fix(proxy): persist per-app takeover state across app restarts

- Fix proxy toggle color to reflect current app's takeover state only - Restore proxy service on startup if Live config is still in takeover state - Preserve per-app backup records instead of clearing all on restart - Only recover Live config when proxy service fails to start
fix(ui): improve AboutSection styling and version detection
2026-07-25 05:38:38 +08:00 · 2025-12-19 15:38:16 +08:00 · 2025-12-19 14:20:43 +08:00 · 2025-12-18 23:41:45 +08:00 · 2025-12-18 22:02:41 +08:00 · 2025-12-18 21:32:17 +08:00
119 changed files with 7940 additions and 3366 deletions
@@ -5,6 +5,100 @@ All notable changes to CC Switch will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

+## [3.9.0-1] - 2025-12-18
+
+### Beta Release
+
+This beta release introduces the **Local API Proxy** feature, along with Skills multi-app support, UI improvements, and numerous bug fixes.
+
+### Major Features
+
+#### Local Proxy Server
+- **Local HTTP Proxy** - High-performance proxy server built on Axum framework
+- **Multi-app Support** - Unified proxy for Claude Code, Codex, and Gemini CLI API requests
+- **Per-app Takeover** - Independent control over which apps route through the proxy
+- **Live Config Takeover** - Automatically backs up and redirects CLI configurations to local proxy
+
+#### Auto Failover
+- **Circuit Breaker** - Automatically detects provider failures and triggers protection
+- **Smart Failover** - Automatically switches to backup provider when current one is unavailable
+- **Health Tracking** - Real-time monitoring of provider availability
+- **Independent Failover Queues** - Each app maintains its own failover queue
+
+#### Monitoring
+- **Request Logging** - Detailed logging of all proxy requests
+- **Usage Statistics** - Token consumption, latency, success rate metrics
+- **Real-time Status** - Frontend displays proxy status and statistics
+
+#### Skills Multi-App Support
+- **Multi-app Support** - Skills now support both Claude and Codex (#365)
+- **Multi-app Migration** - Existing Skills auto-migrate to multi-app structure (#378)
+- **Installation Path Fix** - Use directory basename for skill installation path (#358)
+
+### Added
+- **Provider Icon Colors** - Customize provider icon colors (#385)
+- **Deeplink Usage Config** - Import usage query config via deeplink (#400)
+- **Error Request Logging** - Detailed logging for proxy requests (#401)
+- **Closable Toast** - Added close button to switch notification toast (#350)
+- **Icon Color Component** - ProviderIcon component supports color prop (#384)
+
+### Fixed
+
+#### Proxy Related
+- Takeover Codex base_url via model_provider
+- Harden crash recovery with fallback detection
+- Sync UI when active provider differs from current setting
+- Resolve circuit breaker race condition and error classification
+- Stabilize live takeover and provider editing
+- Reset health badges when proxy stops
+- Retry failover for all HTTP errors including 4xx
+- Fix HalfOpen counter underflow and config field inconsistencies
+- Resolve circuit breaker state persistence and HalfOpen deadlock
+- Auto-recover live config after abnormal exit
+- Update live backup when hot-switching provider in proxy mode
+- Wait for server shutdown before exiting app
+- Disable auto-start on app launch by resetting enabled flag on stop
+- Sync live config tokens to database before takeover
+- Resolve 404 error and auto-setup proxy targets
+
+#### MCP Related
+- Skip sync when target CLI app is not installed
+- Improve upsert and import robustness
+- Use browser-compatible platform detection for MCP presets
+
+#### UI Related
+- Restore fade transition for Skills button
+- Add close button to all success toasts
+- Prevent card jitter when health badge appears
+- Update SettingsPage tab styles (#342)
+
+#### Other
+- Fix Azure website link (#407)
+- Add fallback to provider config for usage credentials (#360)
+- Fix Windows black screen on startup (use system titlebar)
+- Add fallback for crypto.randomUUID() on older WebViews
+- Use correct npm package for Codex CLI version check
+- Security fixes for JavaScript executor and usage script (#151)
+
+### Improved
+- **Proxy Active Theme** - Apply emerald theme when proxy takeover is active
+- **Card Animation** - Improved provider card hover animation
+- **Remove Restart Prompt** - No longer prompts restart when switching providers
+
+### Technical
+- Implement per-app takeover mode
+- Proxy module contains 20+ Rust files with complete layered architecture
+- Add 5 new database tables for proxy functionality
+- Modularize handlers.rs to reduce code duplication
+- Remove is_proxy_target in favor of failover_queue
+
+### Stats
+- 55 commits since v3.8.2
+- 164 files changed
+- +22,164 / -570 lines
+
+---
+
 ## [3.8.0] - 2025-11-28

 ### Major Updates
@@ -3,7 +3,6 @@
 # All-in-One Assistant for Claude Code, Codex & Gemini CLI

 [![Version](https://img.shields.io/badge/version-3.8.2-blue.svg)](https://github.com/farion1231/cc-switch/releases)
-[![Trending](https://img.shields.io/badge/🔥_TypeScript_Trending-Daily%20%7C%20Weekly%20%7C%20Monthly-ff6b6b.svg)](https://github.com/trending/typescript)
 [![Platform](https://img.shields.io/badge/platform-Windows%20%7C%20macOS%20%7C%20Linux-lightgrey.svg)](https://github.com/farion1231/cc-switch/releases)
 [![Built with Tauri](https://img.shields.io/badge/built%20with-Tauri%202-orange.svg)](https://tauri.app/)
 [![Downloads](https://img.shields.io/endpoint?url=https://api.pinstudios.net/api/badges/downloads/farion1231/cc-switch/total)](https://github.com/farion1231/cc-switch/releases/latest)
@@ -12,21 +11,13 @@

 English | [中文](README_ZH.md) | [日本語](README_JA.md) | [Changelog](CHANGELOG.md)

-**From Provider Switcher to All-in-One AI CLI Management Platform**
-
-Unified management for Claude Code, Codex & Gemini CLI provider configurations, MCP servers, Skills extensions, and system prompts.
-
 </div>

 ## ❤️Sponsor

 ![Zhipu GLM](assets/partners/banners/glm-en.jpg)

-This project is sponsored by Z.ai, supporting us with their GLM CODING PLAN.
-
-GLM CODING PLAN is a subscription service designed for AI coding, starting at just $3/month. It provides access to their flagship GLM-4.6 model across 10+ popular AI coding tools (Claude Code, Cline, Roo Code, etc.), offering developers top-tier, fast, and stable coding experiences.
-
-Get 10% OFF the GLM CODING PLAN with [this link](https://z.ai/subscribe?ic=8JVLJQFSKB)!
+This project is sponsored by Z.ai, supporting us with their GLM CODING PLAN.GLM CODING PLAN is a subscription service designed for AI coding, starting at just $3/month. It provides access to their flagship GLM-4.6 model across 10+ popular AI coding tools (Claude Code, Cline, Roo Code, etc.), offering developers top-tier, fast, and stable coding experiences.Get 10% OFF the GLM CODING PLAN with [this link](https://z.ai/subscribe?ic=8JVLJQFSKB)!

 ---

@@ -41,6 +32,12 @@ Get 10% OFF the GLM CODING PLAN with [this link](https://z.ai/subscribe?ic=8JVLJ
 <td>Thanks to ShanDianShuo for sponsoring this project! ShanDianShuo is a local-first AI voice input: Millisecond latency, data stays on device, 4x faster than typing, AI-powered correction, Privacy-first, completely free. Doubles your coding efficiency with Claude Code! <a href="https://www.shandianshuo.cn">Free download</a> for Mac/Win</td>
 </tr>

+<tr>
+<td width="180"><img src="assets/partners/logos/aigocode.png" alt="AIGoCode" width="150"></td>
+<td>Thanks to AIGoCode for sponsoring this project! AIGoCode is an all-in-one platform that integrates Claude Code, Codex, and the latest Gemini models, providing you with stable, efficient, and highly cost-effective AI coding services. The platform offers flexible subscription plans, zero risk of account suspension, direct access with no VPN required, and lightning-fast responses.AIGoCode has prepared a special benefit for CC Switch users: if you register via <a href="https://aigocode.com/invite/CC-SWITCH">this link</a>, you’ll receive an extra 10% bonus credit on your first top-up!
+</td>
+</tr>
+
 </table>

 ## Screenshots
@@ -3,7 +3,6 @@
 # Claude Code / Codex / Gemini CLI オールインワン・アシスタント

 [![Version](https://img.shields.io/badge/version-3.8.2-blue.svg)](https://github.com/farion1231/cc-switch/releases)
-[![Trending](https://img.shields.io/badge/🔥_TypeScript_Trending-Daily%20%7C%20Weekly%20%7C%20Monthly-ff6b6b.svg)](https://github.com/trending/typescript)
 [![Platform](https://img.shields.io/badge/platform-Windows%20%7C%20macOS%20%7C%20Linux-lightgrey.svg)](https://github.com/farion1231/cc-switch/releases)
 [![Built with Tauri](https://img.shields.io/badge/built%20with-Tauri%202-orange.svg)](https://tauri.app/)
 [![Downloads](https://img.shields.io/endpoint?url=https://api.pinstudios.net/api/badges/downloads/farion1231/cc-switch/total)](https://github.com/farion1231/cc-switch/releases/latest)
@@ -12,21 +11,13 @@

 [English](README.md) | [中文](README_ZH.md) | 日本語 | [Changelog](CHANGELOG.md) | [v3.8.0 リリースノート](docs/release-note-v3.8.0-en.md)

-**プロバイダスイッチャーから AI CLI 一体型管理プラットフォームへ**
-
-Claude Code・Codex・Gemini CLI のプロバイダ設定、MCP サーバー、Skills 拡張、システムプロンプトを統合管理。
-
 </div>

 ## ❤️スポンサー

 ![Zhipu GLM](assets/partners/banners/glm-en.jpg)

-本プロジェクトは Z.ai の GLM CODING PLAN による支援を受けています。
-
-GLM CODING PLAN は AI コーディング向けのサブスクリプションで、月額わずか 3 ドルから。Claude Code、Cline、Roo Code など 10 以上の人気 AI コーディングツールでフラッグシップモデル GLM-4.6 を利用でき、速く安定した開発体験を提供します。
-
-[このリンク](https://z.ai/subscribe?ic=8JVLJQFSKB) から申し込むと 10% オフになります！
+本プロジェクトは Z.ai の GLM CODING PLAN による支援を受けています。GLM CODING PLAN は AI コーディング向けのサブスクリプションで、月額わずか 3 ドルから。Claude Code、Cline、Roo Code など 10 以上の人気 AI コーディングツールでフラッグシップモデル GLM-4.6 を利用でき、速く安定した開発体験を提供します。[このリンク](https://z.ai/subscribe?ic=8JVLJQFSKB) から申し込むと 10% オフになります！

 ---

@@ -41,6 +32,13 @@ GLM CODING PLAN は AI コーディング向けのサブスクリプションで
 <td>ShanDianShuo のご支援に感謝します！ShanDianShuo はローカルファーストの音声入力ツールで、ミリ秒遅延・データは端末から外に出ず・キーボード入力の 4 倍の速度・AI 自動補正・プライバシー優先で完全無料。Claude Code と組み合わせればコーディング効率が倍増します。<a href="https://www.shandianshuo.cn">Mac/Win 版を無料ダウンロード</a></td>
 </tr>

+<tr>
+<td width="180"><img src="assets/partners/logos/aigocode.png" alt="AIGoCode" width="150"></td>
+<td>本プロジェクトは AIGoCode のスポンサー提供でお届けしています。AIGoCode は、Claude Code・Codex・最新の Gemini モデルを統合したオールインワンのAIコーディングプラットフォームで、安定性・高速性・コストパフォーマンスに優れた開発サービスを提供します。柔軟なサブスクリプションプランを備え、レスポンスも非常に高速です。さらに、CC Switch ユーザー向けの特典として、<a href="https://aigocode.com/invite/CC-SWITCH">このリンク</a>から登録すると、初回チャージ時に10％分のボーナスクレジットが付与されます！
+
+</td>
+</tr>
+
 </table>

 ## スクリーンショット
@@ -3,7 +3,6 @@
 # Claude Code / Codex / Gemini CLI 全方位辅助工具

 [![Version](https://img.shields.io/badge/version-3.8.2-blue.svg)](https://github.com/farion1231/cc-switch/releases)
-[![Trending](https://img.shields.io/badge/🔥_TypeScript_Trending-Daily%20%7C%20Weekly%20%7C%20Monthly-ff6b6b.svg)](https://github.com/trending/typescript)
 [![Platform](https://img.shields.io/badge/platform-Windows%20%7C%20macOS%20%7C%20Linux-lightgrey.svg)](https://github.com/farion1231/cc-switch/releases)
 [![Built with Tauri](https://img.shields.io/badge/built%20with-Tauri%202-orange.svg)](https://tauri.app/)
 [![Downloads](https://img.shields.io/endpoint?url=https://api.pinstudios.net/api/badges/downloads/farion1231/cc-switch/total)](https://github.com/farion1231/cc-switch/releases/latest)
@@ -12,21 +11,13 @@

 [English](README.md) | 中文 | [日本語](README_JA.md) | [更新日志](CHANGELOG.md) | [v3.8.0 发布说明](docs/release-note-v3.8.0-zh.md)

-**从供应商切换器到 AI CLI 一体化管理平台**
-
-统一管理 Claude Code、Codex 与 Gemini CLI 的供应商配置、MCP 服务器、Skills 扩展和系统提示词。
-
 </div>

 ## ❤️赞助商

 ![智谱 GLM](assets/partners/banners/glm-zh.jpg)

-感谢智谱AI的 GLM CODING PLAN 赞助了本项目！
-
-GLM CODING PLAN 是专为AI编码打造的订阅套餐,每月最低仅需20元，即可在十余款主流AI编码工具如 Claude Code、Cline 中畅享智谱旗舰模型 GLM-4.6，为开发者提供顶尖、高速、稳定的编码体验。
-
-CC Switch 已经预设了智谱GLM，只需要填写 key 即可一键导入编程工具。智谱AI为本软件的用户提供了特别优惠，使用[此链接](https://www.bigmodel.cn/claude-code?ic=RRVJPB5SII)购买可以享受九折优惠。
+感谢智谱AI的 GLM CODING PLAN 赞助了本项目！GLM CODING PLAN 是专为AI编码打造的订阅套餐,每月最低仅需20元，即可在十余款主流AI编码工具如 Claude Code、Cline 中畅享智谱旗舰模型 GLM-4.6，为开发者提供顶尖、高速、稳定的编码体验。CC Switch 已经预设了智谱GLM，只需要填写 key 即可一键导入编程工具。智谱AI为本软件的用户提供了特别优惠，使用[此链接](https://www.bigmodel.cn/claude-code?ic=RRVJPB5SII)购买可以享受九折优惠。

 ---

@@ -41,6 +32,11 @@ CC Switch 已经预设了智谱GLM，只需要填写 key 即可一键导入编
 <td>感谢闪电说赞助了本项目！闪电说是本地优先的 AI 语音输入法：毫秒级响应，数据不离设备；打字速度提升 4 倍，AI 智能纠错；绝对隐私安全，完全免费，配合 Claude Code 写代码效率翻倍！支持 Mac/Win 双平台，<a href="https://www.shandianshuo.cn">免费下载</a></td>
 </tr>

+<tr>
+<td width="180"><img src="assets/partners/logos/aigocode.png" alt="AIGoCode" width="150"></td>
+<td>感谢 AIGoCode 赞助了本项目！AIGoCode 是一个集成了 Claude Code、Codex 以及 Gemini 最新模型的一站式平台，为你提供稳定、高效且高性价比的AI编程服务。本站提供灵活的订阅计划，零封号风险，国内直连，无需魔法，极速响应。AIGoCode 为 CC Switch 的用户提供了特别福利，通过<a href="https://aigocode.com/invite/CC-SWITCH">此链接</a>注册的用户首次充值可以获得额外10%奖励额度！</td>
+</tr>
+
 </table>

 ## 界面预览
@@ -0,0 +1,165 @@
+# CC Switch 代理功能使用指南
+
+## 功能介绍
+
+CC Switch 的代理功能是一个本地 HTTP 代理服务器，可以统一管理 Claude Code、Codex 和 Gemini CLI 的 API 请求。主要特性包括：
+
+- **统一代理入口** - 所有 CLI 应用的请求通过本地代理转发
+- **自动故障转移** - 当前供应商故障时自动切换到备用供应商
+- **按应用控制** - 可独立控制每个应用是否启用代理
+- **配置保护** - 自动备份原始配置，停止代理时安全恢复
+
+## 快速开始
+
+### 1. 启动代理
+
+在 CC Switch 主界面，点击右上角的 **Proxy** 按钮，可以看到代理控制面板。
+
+点击 **启动代理** 按钮启动本地代理服务器。代理默认监听 `127.0.0.1:15721`。
+
+### 2. 启用应用接管
+
+代理启动后，你可以选择让哪些应用的请求通过代理：
+
+- **Claude** - 接管 Claude Code 的 API 请求
+- **Codex** - 接管 Codex CLI 的 API 请求
+- **Gemini** - 接管 Gemini CLI 的 API 请求
+
+点击对应应用的开关即可启用/禁用接管。
+
+> **注意**：启用接管后，CC Switch 会自动修改对应应用的配置文件，将 API 端点指向本地代理。原始配置会被安全备份。
+
+### 3. 正常使用 CLI
+
+启用接管后，你可以正常使用各个 CLI 工具。所有请求都会经过 CC Switch 代理转发到配置的供应商。
+
+### 4. 停止代理
+
+当你不再需要代理时，点击 **停止代理** 按钮。CC Switch 会：
+
+1. 安全关闭代理服务器
+2. 自动恢复所有应用的原始配置
+3. 清除代理状态
+
+## 自动故障转移
+
+### 工作原理
+
+代理功能内置了智能故障转移机制：
+
+1. **健康监控** - 实时监控每个供应商的响应状态
+2. **熔断器** - 连续失败 5 次后触发熔断，暂停使用该供应商
+3. **自动切换** - 熔断后自动切换到列表中的下一个供应商
+4. **自动恢复** - 30 秒后尝试恢复熔断的供应商
+
+### 配置故障转移
+
+要使用故障转移功能，你需要：
+
+1. 在对应应用下添加多个供应商（至少 2 个）
+2. 启动代理并启用接管
+3. 当主供应商故障时，代理会自动切换到备用供应商
+
+### 健康状态指示
+
+在供应商卡片上可以看到健康状态指示：
+
+- **绿色** - 供应商正常
+- **红色** - 供应商故障/熔断中
+- **灰色** - 未使用代理或未检测
+
+## 按应用接管
+
+v3.9.0 新增了按应用分粒度控制功能：
+
+- 你可以只接管 Claude，而让 Codex 使用原始配置
+- 每个应用的接管状态独立管理
+- 启用/禁用不会影响其他应用
+
+### 接管状态检测
+
+CC Switch 通过检测配置备份来判断接管状态：
+
+- 存在备份 = 已接管
+- 无备份 = 未接管
+
+这确保了即使 CC Switch 异常退出，重新启动后也能正确识别状态。
+
+## 代理配置
+
+在代理面板中，你可以配置以下参数：
+
+| 参数 | 默认值 | 说明 |
+|------|--------|------|
+| 监听地址 | 127.0.0.1 | 代理服务器绑定地址 |
+| 监听端口 | 15721 | 代理服务器端口 |
+| 最大重试 | 3 | 请求失败时的最大重试次数 |
+| 请求超时 | 120 秒 | 单个请求的超时时间 |
+| 启用日志 | 是 | 是否记录请求日志 |
+
+## 常见问题
+
+### Q: 代理启动失败，提示端口被占用？
+
+A: 默认端口 15721 可能被其他程序占用。你可以：
+- 关闭占用该端口的程序
+- 在代理配置中修改端口号
+
+### Q: 启用接管后 CLI 无法使用？
+
+A: 请检查：
+1. 代理服务器是否正常运行（查看代理面板状态）
+2. 供应商配置是否正确（API Key 等）
+3. 网络连接是否正常
+
+### Q: 如何恢复原始配置？
+
+A: 点击 **停止代理** 按钮，CC Switch 会自动恢复所有应用的原始配置。
+
+如果 CC Switch 异常退出，重新启动后会检测到之前的备份，你可以：
+- 点击停止代理来恢复配置
+- 或继续使用代理功能
+
+### Q: 故障转移没有生效？
+
+A: 请确保：
+1. 配置了至少 2 个供应商
+2. 代理已启动且接管已启用
+3. 故障转移只在代理模式下工作
+
+### Q: 代理会影响性能吗？
+
+A: 本地代理的延迟开销非常小（通常 < 1ms）。但如果启用了请求日志，在高频请求场景下可能会有少量性能影响。
+
+## 技术细节
+
+### 配置文件位置
+
+启用接管后，CC Switch 会修改以下配置文件：
+
+| 应用 | 配置文件 | 修改内容 |
+|------|----------|----------|
+| Claude | `~/.claude/settings.json` | `apiBaseUrl` 指向代理 |
+| Codex | `~/.codex/config.toml` | `[api] baseUrl` 指向代理 |
+| Gemini | `~/.gemini/.env` | `GEMINI_BASE_URL` 指向代理 |
+
+原始配置备份在 CC Switch 数据库中，停止代理时自动恢复。
+
+### 代理模式
+
+代理服务器运行在接管模式下，会：
+
+1. 接收来自 CLI 的 HTTPS 请求
+2. 根据当前供应商配置转发到真实 API 端点
+3. 返回响应给 CLI
+4. 记录请求日志和健康状态
+
+### 数据库表
+
+代理功能使用以下数据库表：
+
+- `proxy_config` - 代理配置
+- `provider_health` - 供应商健康状态
+- `proxy_request_logs` - 请求日志
+- `circuit_breaker_config` - 熔断器配置
+- `proxy_live_backup` - Live 配置备份
@@ -1,6 +1,6 @@
 {
  "name": "cc-switch",
-  "version": "3.8.2",
+  "version": "3.9.0-1",
  "description": "All-in-One Assistant for Claude Code, Codex & Gemini CLI",
  "scripts": {
    "dev": "pnpm tauri dev",
@@ -695,7 +695,7 @@ dependencies = [

 [[package]]
 name = "cc-switch"
-version = "3.8.2"
+version = "3.9.0-1"
 dependencies = [
 "anyhow",
 "async-stream",
@@ -1,6 +1,6 @@
 [package]
 name = "cc-switch"
-version = "3.8.2"
+version = "3.9.0-1"
 description = "All-in-One Assistant for Claude Code, Codex & Gemini CLI"
 authors = ["Jason Young"]
 license = "MIT"
@@ -0,0 +1,84 @@
+//! 故障转移队列命令
+//!
+//! 管理代理模式下的故障转移队列
+
+use crate::database::FailoverQueueItem;
+use crate::provider::Provider;
+use crate::store::AppState;
+
+/// 获取故障转移队列
+#[tauri::command]
+pub async fn get_failover_queue(
+    state: tauri::State<'_, AppState>,
+    app_type: String,
+) -> Result<Vec<FailoverQueueItem>, String> {
+    state
+        .db
+        .get_failover_queue(&app_type)
+        .map_err(|e| e.to_string())
+}
+
+/// 获取可添加到故障转移队列的供应商（不在队列中的）
+#[tauri::command]
+pub async fn get_available_providers_for_failover(
+    state: tauri::State<'_, AppState>,
+    app_type: String,
+) -> Result<Vec<Provider>, String> {
+    state
+        .db
+        .get_available_providers_for_failover(&app_type)
+        .map_err(|e| e.to_string())
+}
+
+/// 添加供应商到故障转移队列
+#[tauri::command]
+pub async fn add_to_failover_queue(
+    state: tauri::State<'_, AppState>,
+    app_type: String,
+    provider_id: String,
+) -> Result<(), String> {
+    state
+        .db
+        .add_to_failover_queue(&app_type, &provider_id)
+        .map_err(|e| e.to_string())
+}
+
+/// 从故障转移队列移除供应商
+#[tauri::command]
+pub async fn remove_from_failover_queue(
+    state: tauri::State<'_, AppState>,
+    app_type: String,
+    provider_id: String,
+) -> Result<(), String> {
+    state
+        .db
+        .remove_from_failover_queue(&app_type, &provider_id)
+        .map_err(|e| e.to_string())
+}
+
+/// 重新排序故障转移队列
+#[tauri::command]
+pub async fn reorder_failover_queue(
+    state: tauri::State<'_, AppState>,
+    app_type: String,
+    provider_ids: Vec<String>,
+) -> Result<(), String> {
+    state
+        .db
+        .reorder_failover_queue(&app_type, &provider_ids)
+        .map_err(|e| e.to_string())
+}
+
+/// 设置故障转移队列项的启用状态
+#[tauri::command]
+pub async fn set_failover_item_enabled(
+    state: tauri::State<'_, AppState>,
+    app_type: String,
+    provider_id: String,
+    enabled: bool,
+) -> Result<(), String> {
+    state
+        .db
+        .set_failover_item_enabled(&app_type, &provider_id, enabled)
+        .map_err(|e| e.to_string())
+}
@@ -155,11 +155,17 @@ fn try_get_version(tool: &str) -> (Option<String>, Option<String>) {

    match output {
        Ok(out) => {
+            let stdout = String::from_utf8_lossy(&out.stdout).trim().to_string();
+            let stderr = String::from_utf8_lossy(&out.stderr).trim().to_string();
            if out.status.success() {
-                let raw = String::from_utf8_lossy(&out.stdout).trim().to_string();
-                (Some(extract_version(&raw)), None)
+                let raw = if stdout.is_empty() { &stderr } else { &stdout };
+                if raw.is_empty() {
+                    (None, Some("未安装或无法执行".to_string()))
+                } else {
+                    (Some(extract_version(raw)), None)
+                }
            } else {
-                let err = String::from_utf8_lossy(&out.stderr).trim().to_string();
+                let err = if stderr.is_empty() { stdout } else { stderr };
                (
                    None,
                    Some(if err.is_empty() {
@@ -232,16 +238,20 @@ fn scan_cli_version(tool: &str) -> (Option<String>, Option<String>) {
            // 构建 PATH 环境变量，确保 node 可被找到
            let current_path = std::env::var("PATH").unwrap_or_default();
            let new_path = format!("{}:{}", path.display(), current_path);
-            
+
            let output = Command::new(&tool_path)
                .arg("--version")
                .env("PATH", &new_path)
                .output();

            if let Ok(out) = output {
+                let stdout = String::from_utf8_lossy(&out.stdout).trim().to_string();
+                let stderr = String::from_utf8_lossy(&out.stderr).trim().to_string();
                if out.status.success() {
-                    let raw = String::from_utf8_lossy(&out.stdout).trim().to_string();
-                    return (Some(extract_version(&raw)), None);
+                    let raw = if stdout.is_empty() { &stderr } else { &stdout };
+                    if !raw.is_empty() {
+                        return (Some(extract_version(raw)), None);
+                    }
                }
            }
        }
@@ -3,29 +3,31 @@
 mod config;
 mod deeplink;
 mod env;
+mod failover;
 mod import_export;
 mod mcp;
 mod misc;
-mod model_test;
 mod plugin;
 mod prompt;
 mod provider;
 mod proxy;
 mod settings;
 pub mod skill;
+mod stream_check;
 mod usage;

 pub use config::*;
 pub use deeplink::*;
 pub use env::*;
+pub use failover::*;
 pub use import_export::*;
 pub use mcp::*;
 pub use misc::*;
-pub use model_test::*;
 pub use plugin::*;
 pub use prompt::*;
 pub use provider::*;
 pub use proxy::*;
 pub use settings::*;
 pub use skill::*;
+pub use stream_check::*;
 pub use usage::*;
@@ -1,128 +0,0 @@
-//! 模型测试相关命令
-
-use crate::app_config::AppType;
-use crate::error::AppError;
-use crate::services::model_test::{
-    ModelTestConfig, ModelTestLog, ModelTestResult, ModelTestService,
-};
-use crate::store::AppState;
-use tauri::State;
-
-/// 测试单个供应商的模型可用性
-#[tauri::command]
-pub async fn test_provider_model(
-    state: State<'_, AppState>,
-    app_type: AppType,
-    provider_id: String,
-) -> Result<ModelTestResult, AppError> {
-    // 获取测试配置
-    let config = state.db.get_model_test_config()?;
-
-    // 获取供应商
-    let providers = state.db.get_all_providers(app_type.as_str())?;
-    let provider = providers
-        .get(&provider_id)
-        .ok_or_else(|| AppError::Message(format!("供应商 {provider_id} 不存在")))?;
-
-    // 执行测试
-    let result = ModelTestService::test_provider(&app_type, provider, &config).await?;
-
-    // 记录日志
-    let _ = state.db.save_model_test_log(
-        &provider_id,
-        &provider.name,
-        app_type.as_str(),
-        &result.model_used,
-        &config.test_prompt,
-        &result,
-    );
-
-    Ok(result)
-}
-
-/// 批量测试所有供应商
-#[tauri::command]
-pub async fn test_all_providers_model(
-    state: State<'_, AppState>,
-    app_type: AppType,
-    proxy_targets_only: bool,
-) -> Result<Vec<(String, ModelTestResult)>, AppError> {
-    let config = state.db.get_model_test_config()?;
-    let providers = state.db.get_all_providers(app_type.as_str())?;
-
-    let mut results = Vec::new();
-
-    for (id, provider) in providers {
-        // 如果只测试代理目标，跳过非代理目标
-        if proxy_targets_only && !provider.is_proxy_target.unwrap_or(false) {
-            continue;
-        }
-
-        match ModelTestService::test_provider(&app_type, &provider, &config).await {
-            Ok(result) => {
-                // 记录日志
-                let _ = state.db.save_model_test_log(
-                    &id,
-                    &provider.name,
-                    app_type.as_str(),
-                    &result.model_used,
-                    &config.test_prompt,
-                    &result,
-                );
-                results.push((id, result));
-            }
-            Err(e) => {
-                let error_result = ModelTestResult {
-                    success: false,
-                    message: e.to_string(),
-                    response_time_ms: None,
-                    http_status: None,
-                    model_used: String::new(),
-                    tested_at: chrono::Utc::now().timestamp(),
-                };
-                results.push((id, error_result));
-            }
-        }
-    }
-
-    Ok(results)
-}
-
-/// 获取模型测试配置
-#[tauri::command]
-pub fn get_model_test_config(state: State<'_, AppState>) -> Result<ModelTestConfig, AppError> {
-    state.db.get_model_test_config()
-}
-
-/// 保存模型测试配置
-#[tauri::command]
-pub fn save_model_test_config(
-    state: State<'_, AppState>,
-    config: ModelTestConfig,
-) -> Result<(), AppError> {
-    state.db.save_model_test_config(&config)
-}
-
-/// 获取模型测试日志
-#[tauri::command]
-pub fn get_model_test_logs(
-    state: State<'_, AppState>,
-    app_type: Option<String>,
-    provider_id: Option<String>,
-    limit: Option<u32>,
-) -> Result<Vec<ModelTestLog>, AppError> {
-    state.db.get_model_test_logs(
-        app_type.as_deref(),
-        provider_id.as_deref(),
-        limit.unwrap_or(50),
-    )
-}
-
-/// 清理旧的测试日志
-#[tauri::command]
-pub fn cleanup_model_test_logs(
-    state: State<'_, AppState>,
-    keep_count: Option<u32>,
-) -> Result<u64, AppError> {
-    state.db.cleanup_model_test_logs(keep_count.unwrap_or(100))
-}
@@ -86,19 +86,6 @@ pub fn switch_provider(
        .map_err(|e| e.to_string())
 }

-/// 设置代理目标供应商
-#[tauri::command]
-pub fn set_proxy_target_provider(
-    state: State<'_, AppState>,
-    app: String,
-    id: String,
-) -> Result<bool, String> {
-    let app_type = AppType::from_str(&app).map_err(|e| e.to_string())?;
-    ProviderService::set_proxy_target(state.inner(), app_type, &id)
-        .map(|_| true)
-        .map_err(|e| e.to_string())
-}
-
 fn import_default_config_internal(state: &AppState, app_type: AppType) -> Result<bool, AppError> {
    ProviderService::import_default_config(state, app_type)
 }
@@ -2,23 +2,51 @@
 //!
 //! 提供前端调用的 API 接口

-use crate::provider::Provider;
 use crate::proxy::types::*;
 use crate::proxy::{CircuitBreakerConfig, CircuitBreakerStats};
 use crate::store::AppState;

-/// 启动代理服务器
+/// 启动代理服务器（仅启动服务，不接管 Live 配置）
 #[tauri::command]
 pub async fn start_proxy_server(
    state: tauri::State<'_, AppState>,
 ) -> Result<ProxyServerInfo, String> {
-    state.proxy_service.start().await
+    state.proxy_service.start(true).await
 }

-/// 停止代理服务器
+/// 启动代理服务器（带 Live 配置接管）
 #[tauri::command]
-pub async fn stop_proxy_server(state: tauri::State<'_, AppState>) -> Result<(), String> {
-    state.proxy_service.stop().await
+pub async fn start_proxy_with_takeover(
+    state: tauri::State<'_, AppState>,
+) -> Result<ProxyServerInfo, String> {
+    state.proxy_service.start_with_takeover().await
+}
+
+/// 停止代理服务器（恢复 Live 配置）
+#[tauri::command]
+pub async fn stop_proxy_with_restore(state: tauri::State<'_, AppState>) -> Result<(), String> {
+    state.proxy_service.stop_with_restore().await
+}
+
+/// 获取各应用接管状态
+#[tauri::command]
+pub async fn get_proxy_takeover_status(
+    state: tauri::State<'_, AppState>,
+) -> Result<ProxyTakeoverStatus, String> {
+    state.proxy_service.get_takeover_status().await
+}
+
+/// 为指定应用开启/关闭接管
+#[tauri::command]
+pub async fn set_proxy_takeover_for_app(
+    state: tauri::State<'_, AppState>,
+    app_type: String,
+    enabled: bool,
+) -> Result<(), String> {
+    state
+        .proxy_service
+        .set_takeover_for_app(&app_type, enabled)
+        .await
 }

 /// 获取代理服务器状态
@@ -48,49 +76,27 @@ pub async fn is_proxy_running(state: tauri::State<'_, AppState>) -> Result<bool,
    Ok(state.proxy_service.is_running().await)
 }

-// ==================== 故障转移相关命令 ====================
-
-/// 获取代理目标列表
+/// 检查是否处于 Live 接管模式
 #[tauri::command]
-pub async fn get_proxy_targets(
-    state: tauri::State<'_, AppState>,
-    app_type: String,
-) -> Result<Vec<Provider>, String> {
-    let db = &state.db;
-    db.get_proxy_targets(&app_type)
-        .await
-        .map_err(|e| e.to_string())
-        .map(|providers| providers.into_values().collect())
+pub async fn is_live_takeover_active(state: tauri::State<'_, AppState>) -> Result<bool, String> {
+    state.proxy_service.is_takeover_active().await
 }

-/// 设置代理目标
+/// 代理模式下切换供应商（热切换）
 #[tauri::command]
-pub async fn set_proxy_target(
+pub async fn switch_proxy_provider(
    state: tauri::State<'_, AppState>,
+    app_type: String,
    provider_id: String,
-    app_type: String,
-    enabled: bool,
 ) -> Result<(), String> {
-    let db = &state.db;
-
-    // 设置代理目标状态
-    db.set_proxy_target(&provider_id, &app_type, enabled)
+    state
+        .proxy_service
+        .switch_proxy_target(&app_type, &provider_id)
        .await
-        .map_err(|e| e.to_string())?;
-
-    // 如果是禁用代理目标，重置健康状态
-    if !enabled {
-        log::info!(
-            "Resetting health status for provider {provider_id} (app: {app_type}) after disabling proxy target"
-        );
-        if let Err(e) = db.reset_provider_health(&provider_id, &app_type).await {
-            log::warn!("Failed to reset provider health: {e}");
-        }
-    }
-
-    Ok(())
 }

+// ==================== 故障转移相关命令 ====================
+
 /// 获取供应商健康状态
 #[tauri::command]
 pub async fn get_provider_health(
@@ -111,15 +117,17 @@ pub async fn reset_circuit_breaker(
    provider_id: String,
    app_type: String,
 ) -> Result<(), String> {
-    // 重置数据库健康状态
+    // 1. 重置数据库健康状态
    let db = &state.db;
    db.update_provider_health(&provider_id, &app_type, true, None)
        .await
        .map_err(|e| e.to_string())?;

-    // 注意：熔断器状态在内存中，重启代理服务器后会重置
-    // 如果代理服务器正在运行，需要通知它重置熔断器
-    // 目前先通过数据库重置健康状态，熔断器会在下次超时后自动尝试半开
+    // 2. 如果代理正在运行，重置内存中的熔断器状态
+    state
+        .proxy_service
+        .reset_provider_circuit_breaker(&provider_id, &app_type)
+        .await?;

    Ok(())
 }
@@ -142,9 +150,19 @@ pub async fn update_circuit_breaker_config(
    config: CircuitBreakerConfig,
 ) -> Result<(), String> {
    let db = &state.db;
+
+    // 1. 更新数据库配置
    db.update_circuit_breaker_config(&config)
        .await
-        .map_err(|e| e.to_string())
+        .map_err(|e| e.to_string())?;
+
+    // 2. 如果代理正在运行，热更新内存中的熔断器配置
+    state
+        .proxy_service
+        .update_circuit_breaker_configs(config)
+        .await?;
+
+    Ok(())
 }

 /// 获取熔断器统计信息（仅当代理服务器运行时）
@@ -0,0 +1,108 @@
+//! 流式健康检查命令
+
+use crate::app_config::AppType;
+use crate::error::AppError;
+use crate::services::stream_check::{
+    HealthStatus, StreamCheckConfig, StreamCheckResult, StreamCheckService,
+};
+use crate::store::AppState;
+use std::collections::HashSet;
+use tauri::State;
+
+/// 流式健康检查（单个供应商）
+#[tauri::command]
+pub async fn stream_check_provider(
+    state: State<'_, AppState>,
+    app_type: AppType,
+    provider_id: String,
+) -> Result<StreamCheckResult, AppError> {
+    let config = state.db.get_stream_check_config()?;
+
+    let providers = state.db.get_all_providers(app_type.as_str())?;
+    let provider = providers
+        .get(&provider_id)
+        .ok_or_else(|| AppError::Message(format!("供应商 {provider_id} 不存在")))?;
+
+    let result = StreamCheckService::check_with_retry(&app_type, provider, &config).await?;
+
+    // 记录日志
+    let _ =
+        state
+            .db
+            .save_stream_check_log(&provider_id, &provider.name, app_type.as_str(), &result);
+
+    Ok(result)
+}
+
+/// 批量流式健康检查
+#[tauri::command]
+pub async fn stream_check_all_providers(
+    state: State<'_, AppState>,
+    app_type: AppType,
+    proxy_targets_only: bool,
+) -> Result<Vec<(String, StreamCheckResult)>, AppError> {
+    let config = state.db.get_stream_check_config()?;
+    let providers = state.db.get_all_providers(app_type.as_str())?;
+
+    let mut results = Vec::new();
+    let allowed_ids: Option<HashSet<String>> = if proxy_targets_only {
+        let mut ids = HashSet::new();
+        if let Ok(Some(current_id)) = state.db.get_current_provider(app_type.as_str()) {
+            ids.insert(current_id);
+        }
+        if let Ok(queue) = state.db.get_failover_queue(app_type.as_str()) {
+            for item in queue {
+                if item.enabled {
+                    ids.insert(item.provider_id);
+                }
+            }
+        }
+        Some(ids)
+    } else {
+        None
+    };
+
+    for (id, provider) in providers {
+        if let Some(ids) = &allowed_ids {
+            if !ids.contains(&id) {
+                continue;
+            }
+        }
+
+        let result = StreamCheckService::check_with_retry(&app_type, &provider, &config)
+            .await
+            .unwrap_or_else(|e| StreamCheckResult {
+                status: HealthStatus::Failed,
+                success: false,
+                message: e.to_string(),
+                response_time_ms: None,
+                http_status: None,
+                model_used: String::new(),
+                tested_at: chrono::Utc::now().timestamp(),
+                retry_count: 0,
+            });
+
+        let _ = state
+            .db
+            .save_stream_check_log(&id, &provider.name, app_type.as_str(), &result);
+
+        results.push((id, result));
+    }
+
+    Ok(results)
+}
+
+/// 获取流式检查配置
+#[tauri::command]
+pub fn get_stream_check_config(state: State<'_, AppState>) -> Result<StreamCheckConfig, AppError> {
+    state.db.get_stream_check_config()
+}
+
+/// 保存流式检查配置
+#[tauri::command]
+pub fn save_stream_check_config(
+    state: State<'_, AppState>,
+    config: StreamCheckConfig,
+) -> Result<(), AppError> {
+    state.db.save_stream_check_config(&config)
+}
@@ -0,0 +1,241 @@
+//! 故障转移队列 DAO
+//!
+//! 管理代理模式下的故障转移队列
+
+use crate::database::{lock_conn, Database};
+use crate::error::AppError;
+use crate::provider::Provider;
+use serde::{Deserialize, Serialize};
+use std::time::{SystemTime, UNIX_EPOCH};
+
+/// 故障转移队列条目
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct FailoverQueueItem {
+    pub provider_id: String,
+    pub provider_name: String,
+    pub queue_order: i32,
+    pub enabled: bool,
+    pub created_at: i64,
+}
+
+impl Database {
+    /// 获取故障转移队列（按 queue_order 排序）
+    pub fn get_failover_queue(&self, app_type: &str) -> Result<Vec<FailoverQueueItem>, AppError> {
+        let conn = lock_conn!(self.conn);
+
+        let mut stmt = conn
+            .prepare(
+                "SELECT fq.provider_id, p.name, fq.queue_order, fq.enabled, fq.created_at
+                 FROM failover_queue fq
+                 JOIN providers p ON fq.provider_id = p.id AND fq.app_type = p.app_type
+                 WHERE fq.app_type = ?1
+                 ORDER BY fq.queue_order ASC",
+            )
+            .map_err(|e| AppError::Database(e.to_string()))?;
+
+        let items = stmt
+            .query_map([app_type], |row| {
+                Ok(FailoverQueueItem {
+                    provider_id: row.get(0)?,
+                    provider_name: row.get(1)?,
+                    queue_order: row.get(2)?,
+                    enabled: row.get(3)?,
+                    created_at: row.get(4)?,
+                })
+            })
+            .map_err(|e| AppError::Database(e.to_string()))?
+            .collect::<Result<Vec<_>, _>>()
+            .map_err(|e| AppError::Database(e.to_string()))?;
+
+        Ok(items)
+    }
+
+    /// 获取故障转移队列中的供应商（完整 Provider 信息，按顺序）
+    pub fn get_failover_providers(&self, app_type: &str) -> Result<Vec<Provider>, AppError> {
+        let queue = self.get_failover_queue(app_type)?;
+        let all_providers = self.get_all_providers(app_type)?;
+
+        let mut result = Vec::new();
+        for item in queue {
+            if item.enabled {
+                if let Some(provider) = all_providers.get(&item.provider_id) {
+                    result.push(provider.clone());
+                }
+            }
+        }
+
+        Ok(result)
+    }
+
+    /// 添加供应商到故障转移队列末尾
+    pub fn add_to_failover_queue(&self, app_type: &str, provider_id: &str) -> Result<(), AppError> {
+        let conn = lock_conn!(self.conn);
+
+        // 获取当前最大 queue_order
+        let max_order: i32 = conn
+            .query_row(
+                "SELECT COALESCE(MAX(queue_order), 0) FROM failover_queue WHERE app_type = ?1",
+                [app_type],
+                |row| row.get(0),
+            )
+            .map_err(|e| AppError::Database(e.to_string()))?;
+
+        let now = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .unwrap_or_default()
+            .as_secs() as i64;
+
+        conn.execute(
+            "INSERT OR IGNORE INTO failover_queue (app_type, provider_id, queue_order, enabled, created_at)
+             VALUES (?1, ?2, ?3, 1, ?4)",
+            rusqlite::params![app_type, provider_id, max_order + 1, now],
+        )
+        .map_err(|e| AppError::Database(e.to_string()))?;
+
+        Ok(())
+    }
+
+    /// 从故障转移队列中移除供应商
+    pub fn remove_from_failover_queue(
+        &self,
+        app_type: &str,
+        provider_id: &str,
+    ) -> Result<(), AppError> {
+        let conn = lock_conn!(self.conn);
+
+        // 获取被删除项的 queue_order
+        let removed_order: Option<i32> = conn
+            .query_row(
+                "SELECT queue_order FROM failover_queue WHERE app_type = ?1 AND provider_id = ?2",
+                [app_type, provider_id],
+                |row| row.get(0),
+            )
+            .ok();
+
+        // 删除该项
+        conn.execute(
+            "DELETE FROM failover_queue WHERE app_type = ?1 AND provider_id = ?2",
+            [app_type, provider_id],
+        )
+        .map_err(|e| AppError::Database(e.to_string()))?;
+
+        // 重新排序后面的项（填补空隙）
+        if let Some(order) = removed_order {
+            conn.execute(
+                "UPDATE failover_queue
+                 SET queue_order = queue_order - 1
+                 WHERE app_type = ?1 AND queue_order > ?2",
+                rusqlite::params![app_type, order],
+            )
+            .map_err(|e| AppError::Database(e.to_string()))?;
+        }
+
+        Ok(())
+    }
+
+    /// 重新排序故障转移队列
+    /// provider_ids: 按新顺序排列的 provider_id 列表
+    pub fn reorder_failover_queue(
+        &self,
+        app_type: &str,
+        provider_ids: &[String],
+    ) -> Result<(), AppError> {
+        let conn = lock_conn!(self.conn);
+
+        // 使用事务确保原子性
+        conn.execute("BEGIN TRANSACTION", [])
+            .map_err(|e| AppError::Database(e.to_string()))?;
+
+        let result = (|| {
+            for (index, provider_id) in provider_ids.iter().enumerate() {
+                conn.execute(
+                    "UPDATE failover_queue
+                     SET queue_order = ?3
+                     WHERE app_type = ?1 AND provider_id = ?2",
+                    rusqlite::params![app_type, provider_id, (index + 1) as i32],
+                )
+                .map_err(|e| AppError::Database(e.to_string()))?;
+            }
+            Ok(())
+        })();
+
+        match result {
+            Ok(_) => {
+                conn.execute("COMMIT", [])
+                    .map_err(|e| AppError::Database(e.to_string()))?;
+                Ok(())
+            }
+            Err(e) => {
+                conn.execute("ROLLBACK", []).ok();
+                Err(e)
+            }
+        }
+    }
+
+    /// 设置故障转移队列中供应商的启用状态
+    pub fn set_failover_item_enabled(
+        &self,
+        app_type: &str,
+        provider_id: &str,
+        enabled: bool,
+    ) -> Result<(), AppError> {
+        let conn = lock_conn!(self.conn);
+
+        conn.execute(
+            "UPDATE failover_queue SET enabled = ?3 WHERE app_type = ?1 AND provider_id = ?2",
+            rusqlite::params![app_type, provider_id, enabled],
+        )
+        .map_err(|e| AppError::Database(e.to_string()))?;
+
+        Ok(())
+    }
+
+    /// 清空故障转移队列
+    pub fn clear_failover_queue(&self, app_type: &str) -> Result<(), AppError> {
+        let conn = lock_conn!(self.conn);
+
+        conn.execute("DELETE FROM failover_queue WHERE app_type = ?1", [app_type])
+            .map_err(|e| AppError::Database(e.to_string()))?;
+
+        Ok(())
+    }
+
+    /// 检查供应商是否在故障转移队列中
+    pub fn is_in_failover_queue(
+        &self,
+        app_type: &str,
+        provider_id: &str,
+    ) -> Result<bool, AppError> {
+        let conn = lock_conn!(self.conn);
+
+        let count: i32 = conn
+            .query_row(
+                "SELECT COUNT(*) FROM failover_queue WHERE app_type = ?1 AND provider_id = ?2",
+                [app_type, provider_id],
+                |row| row.get(0),
+            )
+            .map_err(|e| AppError::Database(e.to_string()))?;
+
+        Ok(count > 0)
+    }
+
+    /// 获取可添加到故障转移队列的供应商（不在队列中的）
+    pub fn get_available_providers_for_failover(
+        &self,
+        app_type: &str,
+    ) -> Result<Vec<Provider>, AppError> {
+        let all_providers = self.get_all_providers(app_type)?;
+        let queue = self.get_failover_queue(app_type)?;
+
+        let queue_ids: std::collections::HashSet<_> =
+            queue.iter().map(|item| &item.provider_id).collect();
+
+        let available: Vec<Provider> = all_providers
+            .into_values()
+            .filter(|p| !queue_ids.contains(&p.id))
+            .collect();
+
+        Ok(available)
+    }
+}
@@ -2,11 +2,15 @@
 //!
 //! Database access operations for each domain

+pub mod failover;
 pub mod mcp;
 pub mod prompts;
 pub mod providers;
 pub mod proxy;
 pub mod settings;
 pub mod skills;
+pub mod stream_check;

 // 所有 DAO 方法都通过 Database impl 提供，无需单独导出
+// 导出 FailoverQueueItem 供外部使用
+pub use failover::FailoverQueueItem;
@@ -17,7 +17,7 @@ impl Database {
    ) -> Result<IndexMap<String, Provider>, AppError> {
        let conn = lock_conn!(self.conn);
        let mut stmt = conn.prepare(
-            "SELECT id, name, settings_config, website_url, category, created_at, sort_index, notes, icon, icon_color, meta, is_proxy_target
+            "SELECT id, name, settings_config, website_url, category, created_at, sort_index, notes, icon, icon_color, meta
             FROM providers WHERE app_type = ?1
             ORDER BY COALESCE(sort_index, 999999), created_at ASC, id ASC"
        ).map_err(|e| AppError::Database(e.to_string()))?;
@@ -35,7 +35,6 @@ impl Database {
                let icon: Option<String> = row.get(8)?;
                let icon_color: Option<String> = row.get(9)?;
                let meta_str: String = row.get(10)?;
-                let is_proxy_target: bool = row.get(11)?;

                let settings_config =
                    serde_json::from_str(&settings_config_str).unwrap_or(serde_json::Value::Null);
@@ -55,7 +54,6 @@ impl Database {
                        meta: Some(meta),
                        icon,
                        icon_color,
-                        is_proxy_target: Some(is_proxy_target),
                    },
                ))
            })
@@ -131,7 +129,7 @@ impl Database {
    ) -> Result<Option<Provider>, AppError> {
        let conn = lock_conn!(self.conn);
        let result = conn.query_row(
-            "SELECT name, settings_config, website_url, category, created_at, sort_index, notes, icon, icon_color, meta, is_proxy_target
+            "SELECT name, settings_config, website_url, category, created_at, sort_index, notes, icon, icon_color, meta
             FROM providers WHERE id = ?1 AND app_type = ?2",
            params![id, app_type],
            |row| {
@@ -145,7 +143,6 @@ impl Database {
                let icon: Option<String> = row.get(7)?;
                let icon_color: Option<String> = row.get(8)?;
                let meta_str: String = row.get(9)?;
-                let is_proxy_target: bool = row.get(10)?;

                let settings_config = serde_json::from_str(&settings_config_str).unwrap_or(serde_json::Value::Null);
                let meta: ProviderMeta = serde_json::from_str(&meta_str).unwrap_or_default();
@@ -162,7 +159,6 @@ impl Database {
                    meta: Some(meta),
                    icon,
                    icon_color,
-                    is_proxy_target: Some(is_proxy_target),
                })
            },
        );
@@ -174,26 +170,6 @@ impl Database {
        }
    }

-    /// 获取代理目标供应商 ID
-    pub fn get_proxy_target_provider(&self, app_type: &str) -> Result<Option<String>, AppError> {
-        let conn = lock_conn!(self.conn);
-        let mut stmt = conn
-            .prepare("SELECT id FROM providers WHERE app_type = ?1 AND is_proxy_target = 1 LIMIT 1")
-            .map_err(|e| AppError::Database(e.to_string()))?;
-
-        let mut rows = stmt
-            .query(params![app_type])
-            .map_err(|e| AppError::Database(e.to_string()))?;
-
-        if let Some(row) = rows.next().map_err(|e| AppError::Database(e.to_string()))? {
-            Ok(Some(
-                row.get(0).map_err(|e| AppError::Database(e.to_string()))?,
-            ))
-        } else {
-            Ok(None)
-        }
-    }
-
    /// 保存供应商（新增或更新）
    ///
    /// 注意：更新模式下不同步 endpoints，因为编辑模式下端点通过单独的 API 管理
@@ -208,17 +184,17 @@ impl Database {
        let mut meta_clone = provider.meta.clone().unwrap_or_default();
        let endpoints = std::mem::take(&mut meta_clone.custom_endpoints);

-        // 检查是否存在（用于判断新增/更新，以及保留 is_current 和 is_proxy_target）
-        let existing: Option<(bool, bool)> = tx
+        // 检查是否存在（用于判断新增/更新，以及保留 is_current）
+        let existing: Option<bool> = tx
            .query_row(
-                "SELECT is_current, is_proxy_target FROM providers WHERE id = ?1 AND app_type = ?2",
+                "SELECT is_current FROM providers WHERE id = ?1 AND app_type = ?2",
                params![provider.id, app_type],
-                |row| Ok((row.get(0)?, row.get(1)?)),
+                |row| row.get(0),
            )
            .ok();

        let is_update = existing.is_some();
-        let (is_current, is_proxy_target) = existing.unwrap_or((false, false));
+        let is_current = existing.unwrap_or(false);

        if is_update {
            // 更新模式：使用 UPDATE 避免触发 ON DELETE CASCADE
@@ -234,9 +210,8 @@ impl Database {
                    icon = ?8,
                    icon_color = ?9,
                    meta = ?10,
-                    is_current = ?11,
-                    is_proxy_target = ?12
-                WHERE id = ?13 AND app_type = ?14",
+                    is_current = ?11
+                WHERE id = ?12 AND app_type = ?13",
                params![
                    provider.name,
                    serde_json::to_string(&provider.settings_config).unwrap(),
@@ -249,7 +224,6 @@ impl Database {
                    provider.icon_color,
                    serde_json::to_string(&meta_clone).unwrap(),
                    is_current,
-                    is_proxy_target,
                    provider.id,
                    app_type,
                ],
@@ -260,8 +234,8 @@ impl Database {
            tx.execute(
                "INSERT INTO providers (
                    id, app_type, name, settings_config, website_url, category,
-                    created_at, sort_index, notes, icon, icon_color, meta, is_current, is_proxy_target
-                ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14)",
+                    created_at, sort_index, notes, icon, icon_color, meta, is_current
+                ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13)",
                params![
                    provider.id,
                    app_type,
@@ -276,7 +250,6 @@ impl Database {
                    provider.icon_color,
                    serde_json::to_string(&meta_clone).unwrap(),
                    is_current,
-                    is_proxy_target,
                ],
            )
            .map_err(|e| AppError::Database(e.to_string()))?;
@@ -332,157 +305,26 @@ impl Database {
        Ok(())
    }

-    /// 设置代理目标供应商
-    pub fn set_proxy_target_provider(&self, app_type: &str, id: &str) -> Result<(), AppError> {
-        let mut conn = lock_conn!(self.conn);
-        let tx = conn
-            .transaction()
-            .map_err(|e| AppError::Database(e.to_string()))?;
-
-        // 重置所有为 0
-        tx.execute(
-            "UPDATE providers SET is_proxy_target = 0 WHERE app_type = ?1",
-            params![app_type],
-        )
-        .map_err(|e| AppError::Database(e.to_string()))?;
-
-        // 设置新的代理目标供应商
-        tx.execute(
-            "UPDATE providers SET is_proxy_target = 1 WHERE id = ?1 AND app_type = ?2",
-            params![id, app_type],
-        )
-        .map_err(|e| AppError::Database(e.to_string()))?;
-
-        tx.commit().map_err(|e| AppError::Database(e.to_string()))?;
-        Ok(())
-    }
-
-    /// 设置单个供应商的代理目标状态（支持多个代理目标）
-    pub async fn set_proxy_target(
+    /// 更新供应商的 settings_config（仅更新配置，不改变其他字段）
+    pub fn update_provider_settings_config(
        &self,
-        provider_id: &str,
        app_type: &str,
-        enabled: bool,
+        provider_id: &str,
+        settings_config: &serde_json::Value,
    ) -> Result<(), AppError> {
        let conn = lock_conn!(self.conn);
        conn.execute(
-            "UPDATE providers SET is_proxy_target = ?1
-             WHERE id = ?2 AND app_type = ?3",
-            params![if enabled { 1 } else { 0 }, provider_id, app_type],
+            "UPDATE providers SET settings_config = ?1 WHERE id = ?2 AND app_type = ?3",
+            params![
+                serde_json::to_string(settings_config).unwrap(),
+                provider_id,
+                app_type
+            ],
        )
        .map_err(|e| AppError::Database(e.to_string()))?;
        Ok(())
    }

-    /// 获取指定应用类型的所有代理目标供应商（按 sort_index 排序）
-    pub async fn get_proxy_targets(
-        &self,
-        app_type: &str,
-    ) -> Result<IndexMap<String, Provider>, AppError> {
-        let conn = lock_conn!(self.conn);
-        let mut stmt = conn.prepare(
-            "SELECT id, name, settings_config, website_url, category, created_at, sort_index, notes, icon, icon_color, meta, is_proxy_target
-             FROM providers WHERE app_type = ?1 AND is_proxy_target = 1
-             ORDER BY COALESCE(sort_index, 999999), created_at ASC, id ASC"
-        ).map_err(|e| AppError::Database(e.to_string()))?;
-
-        let provider_iter = stmt
-            .query_map(params![app_type], |row| {
-                let id: String = row.get(0)?;
-                let name: String = row.get(1)?;
-                let settings_config_str: String = row.get(2)?;
-                let website_url: Option<String> = row.get(3)?;
-                let category: Option<String> = row.get(4)?;
-                let created_at: Option<i64> = row.get(5)?;
-                let sort_index: Option<usize> = row.get(6)?;
-                let notes: Option<String> = row.get(7)?;
-                let icon: Option<String> = row.get(8)?;
-                let icon_color: Option<String> = row.get(9)?;
-                let meta_str: String = row.get(10)?;
-                let is_proxy_target: bool = row.get(11)?;
-
-                let settings_config =
-                    serde_json::from_str(&settings_config_str).unwrap_or(serde_json::Value::Null);
-                let meta: ProviderMeta = serde_json::from_str(&meta_str).unwrap_or_default();
-
-                Ok((
-                    id,
-                    Provider {
-                        id: "".to_string(),
-                        name,
-                        settings_config,
-                        website_url,
-                        category,
-                        created_at,
-                        sort_index,
-                        notes,
-                        meta: Some(meta),
-                        icon,
-                        icon_color,
-                        is_proxy_target: Some(is_proxy_target),
-                    },
-                ))
-            })
-            .map_err(|e| AppError::Database(e.to_string()))?;
-
-        let mut providers = IndexMap::new();
-        for provider_res in provider_iter {
-            let (id, mut provider) = provider_res.map_err(|e| AppError::Database(e.to_string()))?;
-            provider.id = id.clone();
-
-            // 加载 endpoints
-            let mut stmt_endpoints = conn.prepare(
-                "SELECT url, added_at FROM provider_endpoints WHERE provider_id = ?1 AND app_type = ?2 ORDER BY added_at ASC, url ASC"
-            ).map_err(|e| AppError::Database(e.to_string()))?;
-
-            let endpoints_iter = stmt_endpoints
-                .query_map(params![id, app_type], |row| {
-                    let url: String = row.get(0)?;
-                    let added_at: Option<i64> = row.get(1)?;
-                    Ok((
-                        url,
-                        crate::settings::CustomEndpoint {
-                            url: "".to_string(),
-                            added_at: added_at.unwrap_or(0),
-                            last_used: None,
-                        },
-                    ))
-                })
-                .map_err(|e| AppError::Database(e.to_string()))?;
-
-            let mut custom_endpoints = HashMap::new();
-            for ep_res in endpoints_iter {
-                let (url, mut ep) = ep_res.map_err(|e| AppError::Database(e.to_string()))?;
-                ep.url = url.clone();
-                custom_endpoints.insert(url, ep);
-            }
-
-            if let Some(meta) = &mut provider.meta {
-                meta.custom_endpoints = custom_endpoints;
-            }
-
-            providers.insert(id, provider);
-        }
-
-        Ok(providers)
-    }
-
-    /// 获取所有活跃的代理目标
-    pub fn get_all_proxy_targets(&self) -> Result<Vec<(String, String, String)>, AppError> {
-        let conn = lock_conn!(self.conn);
-        let mut stmt = conn
-            .prepare("SELECT app_type, name, id FROM providers WHERE is_proxy_target = 1")
-            .map_err(|e| AppError::Database(e.to_string()))?;
-
-        let targets = stmt
-            .query_map([], |row| Ok((row.get(0)?, row.get(1)?, row.get(2)?)))
-            .map_err(|e| AppError::Database(e.to_string()))?
-            .collect::<Result<Vec<_>, _>>()
-            .map_err(|e| AppError::Database(e.to_string()))?;
-
-        Ok(targets)
-    }
-
    /// 添加自定义端点
    pub fn add_custom_endpoint(
        &self,
@@ -17,7 +17,7 @@ impl Database {
            let conn = lock_conn!(self.conn);
            conn.query_row(
                "SELECT enabled, listen_address, listen_port, max_retries,
-                        request_timeout, enable_logging
+                        request_timeout, enable_logging, live_takeover_active
                 FROM proxy_config WHERE id = 1",
                [],
                |row| {
@@ -28,6 +28,7 @@ impl Database {
                        max_retries: row.get::<_, i32>(3)? as u8,
                        request_timeout: row.get::<_, i32>(4)? as u64,
                        enable_logging: row.get::<_, i32>(5)? != 0,
+                        live_takeover_active: row.get::<_, i32>(6).unwrap_or(0) != 0,
                    })
                },
            )
@@ -51,8 +52,8 @@ impl Database {

        conn.execute(
            "INSERT OR REPLACE INTO proxy_config
-             (id, enabled, listen_address, listen_port, max_retries, request_timeout, enable_logging, target_app, created_at, updated_at)
-             VALUES (1, ?1, ?2, ?3, ?4, ?5, ?6, ?7,
+             (id, enabled, listen_address, listen_port, max_retries, request_timeout, enable_logging, live_takeover_active, target_app, created_at, updated_at)
+             VALUES (1, ?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8,
                     COALESCE((SELECT created_at FROM proxy_config WHERE id = 1), datetime('now')),
                     datetime('now'))",
            rusqlite::params![
@@ -62,6 +63,7 @@ impl Database {
                config.max_retries as i32,
                config.request_timeout as i32,
                if config.enable_logging { 1 } else { 0 },
+                if config.live_takeover_active { 1 } else { 0 },
                "claude", // 兼容旧字段，写入默认值
            ],
        )
@@ -70,6 +72,23 @@ impl Database {
        Ok(())
    }

+    /// 设置 Live 接管状态
+    pub async fn set_live_takeover_active(&self, active: bool) -> Result<(), AppError> {
+        let conn = lock_conn!(self.conn);
+        conn.execute(
+            "UPDATE proxy_config SET live_takeover_active = ?1, updated_at = datetime('now') WHERE id = 1",
+            rusqlite::params![if active { 1 } else { 0 }],
+        )
+        .map_err(|e| AppError::Database(e.to_string()))?;
+        Ok(())
+    }
+
+    /// 检查是否处于 Live 接管模式
+    pub async fn is_live_takeover_active(&self) -> Result<bool, AppError> {
+        // v3.7.0+：以 proxy_live_backup 是否存在作为“接管状态”的真实来源（更贴近 per-app 接管）
+        self.has_any_live_backup().await
+    }
+
    // ==================== Provider Health ====================

    /// 获取Provider健康状态
@@ -103,12 +122,31 @@ impl Database {
    }

    /// 更新Provider健康状态
+    ///
+    /// 使用默认阈值（5）判断是否健康，建议使用 `update_provider_health_with_threshold` 传入配置的阈值
    pub async fn update_provider_health(
        &self,
        provider_id: &str,
        app_type: &str,
        success: bool,
        error_msg: Option<String>,
+    ) -> Result<(), AppError> {
+        // 默认阈值与 CircuitBreakerConfig::default() 保持一致
+        self.update_provider_health_with_threshold(provider_id, app_type, success, error_msg, 5)
+            .await
+    }
+
+    /// 更新Provider健康状态（带阈值参数）
+    ///
+    /// # Arguments
+    /// * `failure_threshold` - 连续失败多少次后标记为不健康
+    pub async fn update_provider_health_with_threshold(
+        &self,
+        provider_id: &str,
+        app_type: &str,
+        success: bool,
+        error_msg: Option<String>,
+        failure_threshold: u32,
    ) -> Result<(), AppError> {
        let conn = lock_conn!(self.conn);

@@ -116,7 +154,7 @@ impl Database {

        // 先查询当前状态
        let current = conn.query_row(
-            "SELECT consecutive_failures FROM provider_health 
+            "SELECT consecutive_failures FROM provider_health
             WHERE provider_id = ?1 AND app_type = ?2",
            rusqlite::params![provider_id, app_type],
            |row| Ok(row.get::<_, i64>(0)? as u32),
@@ -128,7 +166,8 @@ impl Database {
        } else {
            // 失败：增加失败计数
            let failures = current.unwrap_or(0) + 1;
-            let healthy = if failures >= 3 { 0 } else { 1 };
+            // 使用传入的阈值而非硬编码
+            let healthy = if failures >= failure_threshold { 0 } else { 1 };
            (healthy, failures)
        };

@@ -143,10 +182,10 @@ impl Database {
            "INSERT OR REPLACE INTO provider_health
             (provider_id, app_type, is_healthy, consecutive_failures,
              last_success_at, last_failure_at, last_error, updated_at)
-             VALUES (?1, ?2, ?3, ?4, 
-                     COALESCE(?5, (SELECT last_success_at FROM provider_health 
+             VALUES (?1, ?2, ?3, ?4,
+                     COALESCE(?5, (SELECT last_success_at FROM provider_health
                                   WHERE provider_id = ?1 AND app_type = ?2)),
-                     COALESCE(?6, (SELECT last_failure_at FROM provider_health 
+                     COALESCE(?6, (SELECT last_failure_at FROM provider_health
                                   WHERE provider_id = ?1 AND app_type = ?2)),
                     ?7, ?8)",
            rusqlite::params![
@@ -184,83 +223,17 @@ impl Database {
        Ok(())
    }

-    // ==================== Proxy Usage (可选) ====================
-
-    /// 记录代理使用统计
-    #[allow(dead_code)]
-    pub async fn record_proxy_usage(&self, record: &ProxyUsageRecord) -> Result<(), AppError> {
+    /// 清空所有Provider健康状态（代理停止时调用）
+    pub async fn clear_all_provider_health(&self) -> Result<(), AppError> {
        let conn = lock_conn!(self.conn);

-        conn.execute(
-            "INSERT INTO proxy_usage 
-             (provider_id, app_type, endpoint, request_tokens, response_tokens,
-              status_code, latency_ms, error, timestamp)
-             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9)",
-            rusqlite::params![
-                &record.provider_id,
-                &record.app_type,
-                &record.endpoint,
-                record.request_tokens,
-                record.response_tokens,
-                record.status_code as i64,
-                record.latency_ms as i64,
-                &record.error,
-                &record.timestamp,
-            ],
-        )
-        .map_err(|e| AppError::Database(e.to_string()))?;
+        conn.execute("DELETE FROM provider_health", [])
+            .map_err(|e| AppError::Database(e.to_string()))?;

+        log::debug!("Cleared all provider health records");
        Ok(())
    }

-    /// 查询最近的使用统计
-    #[allow(dead_code)]
-    pub async fn get_recent_usage(
-        &self,
-        provider_id: &str,
-        app_type: &str,
-        limit: usize,
-    ) -> Result<Vec<ProxyUsageRecord>, AppError> {
-        let conn = lock_conn!(self.conn);
-
-        let mut stmt = conn
-            .prepare(
-                "SELECT provider_id, app_type, endpoint, request_tokens, response_tokens,
-                        status_code, latency_ms, error, timestamp
-                 FROM proxy_usage
-                 WHERE provider_id = ?1 AND app_type = ?2
-                 ORDER BY timestamp DESC
-                 LIMIT ?3",
-            )
-            .map_err(|e| AppError::Database(e.to_string()))?;
-
-        let rows = stmt
-            .query_map(
-                rusqlite::params![provider_id, app_type, limit as i64],
-                |row| {
-                    Ok(ProxyUsageRecord {
-                        provider_id: row.get(0)?,
-                        app_type: row.get(1)?,
-                        endpoint: row.get(2)?,
-                        request_tokens: row.get(3)?,
-                        response_tokens: row.get(4)?,
-                        status_code: row.get::<_, i64>(5)? as u16,
-                        latency_ms: row.get::<_, i64>(6)? as u64,
-                        error: row.get(7)?,
-                        timestamp: row.get(8)?,
-                    })
-                },
-            )
-            .map_err(|e| AppError::Database(e.to_string()))?;
-
-        let mut records = Vec::new();
-        for row in rows {
-            records.push(row.map_err(|e| AppError::Database(e.to_string()))?);
-        }
-
-        Ok(records)
-    }
-
    // ==================== Circuit Breaker Config ====================

    /// 获取熔断器配置
@@ -318,4 +291,85 @@ impl Database {

        Ok(())
    }
+
+    // ==================== Live Backup ====================
+
+    /// 保存 Live 配置备份
+    pub async fn save_live_backup(
+        &self,
+        app_type: &str,
+        config_json: &str,
+    ) -> Result<(), AppError> {
+        let conn = lock_conn!(self.conn);
+        let now = chrono::Utc::now().to_rfc3339();
+
+        conn.execute(
+            "INSERT OR REPLACE INTO proxy_live_backup (app_type, original_config, backed_up_at)
+             VALUES (?1, ?2, ?3)",
+            rusqlite::params![app_type, config_json, now],
+        )
+        .map_err(|e| AppError::Database(e.to_string()))?;
+
+        log::info!("已备份 {app_type} Live 配置");
+        Ok(())
+    }
+
+    /// 检查是否存在任意 Live 配置备份
+    pub async fn has_any_live_backup(&self) -> Result<bool, AppError> {
+        let conn = lock_conn!(self.conn);
+        let count: i64 = conn
+            .query_row("SELECT COUNT(*) FROM proxy_live_backup", [], |row| {
+                row.get(0)
+            })
+            .map_err(|e| AppError::Database(e.to_string()))?;
+        Ok(count > 0)
+    }
+
+    /// 获取 Live 配置备份
+    pub async fn get_live_backup(&self, app_type: &str) -> Result<Option<LiveBackup>, AppError> {
+        let conn = lock_conn!(self.conn);
+
+        let result = conn.query_row(
+            "SELECT app_type, original_config, backed_up_at FROM proxy_live_backup WHERE app_type = ?1",
+            rusqlite::params![app_type],
+            |row| {
+                Ok(LiveBackup {
+                    app_type: row.get(0)?,
+                    original_config: row.get(1)?,
+                    backed_up_at: row.get(2)?,
+                })
+            },
+        );
+
+        match result {
+            Ok(backup) => Ok(Some(backup)),
+            Err(rusqlite::Error::QueryReturnedNoRows) => Ok(None),
+            Err(e) => Err(AppError::Database(e.to_string())),
+        }
+    }
+
+    /// 删除 Live 配置备份
+    pub async fn delete_live_backup(&self, app_type: &str) -> Result<(), AppError> {
+        let conn = lock_conn!(self.conn);
+
+        conn.execute(
+            "DELETE FROM proxy_live_backup WHERE app_type = ?1",
+            rusqlite::params![app_type],
+        )
+        .map_err(|e| AppError::Database(e.to_string()))?;
+
+        log::info!("已删除 {app_type} Live 配置备份");
+        Ok(())
+    }
+
+    /// 删除所有 Live 配置备份
+    pub async fn delete_all_live_backups(&self) -> Result<(), AppError> {
+        let conn = lock_conn!(self.conn);
+
+        conn.execute("DELETE FROM proxy_live_backup", [])
+            .map_err(|e| AppError::Database(e.to_string()))?;
+
+        log::info!("已删除所有 Live 配置备份");
+        Ok(())
+    }
 }
@@ -0,0 +1,57 @@
+//! 流式健康检查日志 DAO
+
+use crate::database::{lock_conn, Database};
+use crate::error::AppError;
+use crate::services::stream_check::{StreamCheckConfig, StreamCheckResult};
+
+impl Database {
+    /// 保存流式检查日志
+    pub fn save_stream_check_log(
+        &self,
+        provider_id: &str,
+        provider_name: &str,
+        app_type: &str,
+        result: &StreamCheckResult,
+    ) -> Result<i64, AppError> {
+        let conn = lock_conn!(self.conn);
+
+        conn.execute(
+            "INSERT INTO stream_check_logs 
+             (provider_id, provider_name, app_type, status, success, message, 
+              response_time_ms, http_status, model_used, retry_count, tested_at)
+             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11)",
+            rusqlite::params![
+                provider_id,
+                provider_name,
+                app_type,
+                format!("{:?}", result.status).to_lowercase(),
+                result.success,
+                result.message,
+                result.response_time_ms.map(|t| t as i64),
+                result.http_status.map(|s| s as i64),
+                result.model_used,
+                result.retry_count as i64,
+                result.tested_at,
+            ],
+        )
+        .map_err(|e| AppError::Database(e.to_string()))?;
+
+        Ok(conn.last_insert_rowid())
+    }
+
+    /// 获取流式检查配置
+    pub fn get_stream_check_config(&self) -> Result<StreamCheckConfig, AppError> {
+        match self.get_setting("stream_check_config")? {
+            Some(json) => serde_json::from_str(&json)
+                .map_err(|e| AppError::Message(format!("解析配置失败: {e}"))),
+            None => Ok(StreamCheckConfig::default()),
+        }
+    }
+
+    /// 保存流式检查配置
+    pub fn save_stream_check_config(&self, config: &StreamCheckConfig) -> Result<(), AppError> {
+        let json = serde_json::to_string(config)
+            .map_err(|e| AppError::Message(format!("序列化配置失败: {e}")))?;
+        self.set_setting("stream_check_config", &json)
+    }
+}
@@ -31,6 +31,9 @@ mod schema;
 #[cfg(test)]
 mod tests;

+// DAO 类型导出供外部使用
+pub use dao::FailoverQueueItem;
+
 use crate::config::get_app_config_dir;
 use crate::error::AppError;
 use rusqlite::Connection;
@@ -31,19 +31,12 @@ impl Database {
                icon_color TEXT,
                meta TEXT NOT NULL DEFAULT '{}',
                is_current BOOLEAN NOT NULL DEFAULT 0,
-                is_proxy_target BOOLEAN NOT NULL DEFAULT 0,
                PRIMARY KEY (id, app_type)
            )",
            [],
        )
        .map_err(|e| AppError::Database(e.to_string()))?;

-        // 尝试添加 is_proxy_target 列（如果表已存在但缺少该列）
-        let _ = conn.execute(
-            "ALTER TABLE providers ADD COLUMN is_proxy_target BOOLEAN NOT NULL DEFAULT 0",
-            [],
-        );
-
        // 2. Provider Endpoints 表
        conn.execute(
            "CREATE TABLE IF NOT EXISTS provider_endpoints (
@@ -173,40 +166,7 @@ impl Database {
        )
        .map_err(|e| AppError::Database(e.to_string()))?;

-        // 10. Proxy Usage 表 (代理使用统计，可选)
-        conn.execute(
-            "CREATE TABLE IF NOT EXISTS proxy_usage (
-                id INTEGER PRIMARY KEY AUTOINCREMENT,
-                provider_id TEXT NOT NULL,
-                app_type TEXT NOT NULL,
-                endpoint TEXT NOT NULL,
-                request_tokens INTEGER,
-                response_tokens INTEGER,
-                status_code INTEGER NOT NULL,
-                latency_ms INTEGER NOT NULL,
-                error TEXT,
-                timestamp TEXT NOT NULL
-            )",
-            [],
-        )
-        .map_err(|e| AppError::Database(e.to_string()))?;
-
-        // 为 proxy_usage 创建索引
-        conn.execute(
-            "CREATE INDEX IF NOT EXISTS idx_proxy_usage_timestamp
-             ON proxy_usage(timestamp)",
-            [],
-        )
-        .map_err(|e| AppError::Database(e.to_string()))?;
-
-        conn.execute(
-            "CREATE INDEX IF NOT EXISTS idx_proxy_usage_provider
-             ON proxy_usage(provider_id, app_type)",
-            [],
-        )
-        .map_err(|e| AppError::Database(e.to_string()))?;
-
-        // 11. Proxy Request Logs 表 (详细请求日志)
+        // 10. Proxy Request Logs 表 (详细请求日志)
        conn.execute(
            "CREATE TABLE IF NOT EXISTS proxy_request_logs (
                request_id TEXT PRIMARY KEY,
@@ -272,7 +232,7 @@ impl Database {
        )
        .map_err(|e| AppError::Database(e.to_string()))?;

-        // 12. Model Pricing 表 (模型定价)
+        // 11. Model Pricing 表 (模型定价)
        conn.execute(
            "CREATE TABLE IF NOT EXISTS model_pricing (
                model_id TEXT PRIMARY KEY,
@@ -286,38 +246,20 @@ impl Database {
        )
        .map_err(|e| AppError::Database(e.to_string()))?;

-        // 13. Usage Daily Stats 表 (每日聚合统计)
+        // 12. Stream Check Logs 表 (流式健康检查日志)
        conn.execute(
-            "CREATE TABLE IF NOT EXISTS usage_daily_stats (
-                date TEXT NOT NULL,
-                provider_id TEXT NOT NULL,
-                app_type TEXT NOT NULL,
-                model TEXT NOT NULL,
-                request_count INTEGER NOT NULL DEFAULT 0,
-                total_input_tokens INTEGER NOT NULL DEFAULT 0,
-                total_output_tokens INTEGER NOT NULL DEFAULT 0,
-                total_cost_usd TEXT NOT NULL DEFAULT '0',
-                success_count INTEGER NOT NULL DEFAULT 0,
-                error_count INTEGER NOT NULL DEFAULT 0,
-                PRIMARY KEY (date, provider_id, app_type, model)
-            )",
-            [],
-        )
-        .map_err(|e| AppError::Database(e.to_string()))?;
-
-        // 14. Model Test Logs 表 (模型测试日志，独立于代理使用统计)
-        conn.execute(
-            "CREATE TABLE IF NOT EXISTS model_test_logs (
+            "CREATE TABLE IF NOT EXISTS stream_check_logs (
                id INTEGER PRIMARY KEY AUTOINCREMENT,
                provider_id TEXT NOT NULL,
                provider_name TEXT NOT NULL,
                app_type TEXT NOT NULL,
-                model TEXT NOT NULL,
-                prompt TEXT NOT NULL,
+                status TEXT NOT NULL,
                success INTEGER NOT NULL,
                message TEXT NOT NULL,
                response_time_ms INTEGER,
                http_status INTEGER,
+                model_used TEXT,
+                retry_count INTEGER DEFAULT 0,
                tested_at INTEGER NOT NULL
            )",
            [],
@@ -325,20 +267,13 @@ impl Database {
        .map_err(|e| AppError::Database(e.to_string()))?;

        conn.execute(
-            "CREATE INDEX IF NOT EXISTS idx_model_test_logs_provider
-             ON model_test_logs(provider_id, app_type)",
+            "CREATE INDEX IF NOT EXISTS idx_stream_check_logs_provider
+             ON stream_check_logs(app_type, provider_id, tested_at DESC)",
            [],
        )
        .map_err(|e| AppError::Database(e.to_string()))?;

-        conn.execute(
-            "CREATE INDEX IF NOT EXISTS idx_model_test_logs_tested_at
-             ON model_test_logs(tested_at DESC)",
-            [],
-        )
-        .map_err(|e| AppError::Database(e.to_string()))?;
-
-        // 15. Circuit Breaker Config 表 (熔断器配置)
+        // 13. Circuit Breaker Config 表 (熔断器配置)
        conn.execute(
            "CREATE TABLE IF NOT EXISTS circuit_breaker_config (
                id INTEGER PRIMARY KEY CHECK (id = 1),
@@ -360,6 +295,47 @@ impl Database {
        )
        .map_err(|e| AppError::Database(e.to_string()))?;

+        // 16. Proxy Live Backup 表 (Live 配置备份)
+        conn.execute(
+            "CREATE TABLE IF NOT EXISTS proxy_live_backup (
+                app_type TEXT PRIMARY KEY,
+                original_config TEXT NOT NULL,
+                backed_up_at TEXT NOT NULL
+            )",
+            [],
+        )
+        .map_err(|e| AppError::Database(e.to_string()))?;
+
+        // 尝试添加 live_takeover_active 列到 proxy_config 表
+        let _ = conn.execute(
+            "ALTER TABLE proxy_config ADD COLUMN live_takeover_active INTEGER NOT NULL DEFAULT 0",
+            [],
+        );
+
+        // 14. Failover Queue 表 (故障转移队列)
+        conn.execute(
+            "CREATE TABLE IF NOT EXISTS failover_queue (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                app_type TEXT NOT NULL,
+                provider_id TEXT NOT NULL,
+                queue_order INTEGER NOT NULL,
+                enabled INTEGER NOT NULL DEFAULT 1,
+                created_at INTEGER NOT NULL,
+                UNIQUE (app_type, provider_id),
+                FOREIGN KEY (provider_id, app_type) REFERENCES providers(id, app_type) ON DELETE CASCADE
+            )",
+            [],
+        )
+        .map_err(|e| AppError::Database(e.to_string()))?;
+
+        // 为故障转移队列创建索引
+        conn.execute(
+            "CREATE INDEX IF NOT EXISTS idx_failover_queue_order
+             ON failover_queue(app_type, queue_order)",
+            [],
+        )
+        .map_err(|e| AppError::Database(e.to_string()))?;
+
        Ok(())
    }

@@ -557,24 +533,6 @@ impl Database {
            [],
        )?;

-        // usage_daily_stats 表
-        conn.execute(
-            "CREATE TABLE IF NOT EXISTS usage_daily_stats (
-                date TEXT NOT NULL,
-                provider_id TEXT NOT NULL,
-                app_type TEXT NOT NULL,
-                model TEXT NOT NULL,
-                request_count INTEGER NOT NULL DEFAULT 0,
-                total_input_tokens INTEGER NOT NULL DEFAULT 0,
-                total_output_tokens INTEGER NOT NULL DEFAULT 0,
-                total_cost_usd TEXT NOT NULL DEFAULT '0',
-                success_count INTEGER NOT NULL DEFAULT 0,
-                error_count INTEGER NOT NULL DEFAULT 0,
-                PRIMARY KEY (date, provider_id, app_type, model)
-            )",
-            [],
-        )?;
-
        // 清空并重新插入模型定价
        conn.execute("DELETE FROM model_pricing", [])
            .map_err(|e| AppError::Database(format!("清空模型定价失败: {e}")))?;
@@ -245,7 +245,6 @@ fn dry_run_validates_schema_compatibility() {
            meta: None,
            icon: None,
            icon_color: None,
-            is_proxy_target: Some(false),
        },
    );

@@ -113,4 +113,27 @@ pub struct DeepLinkImportRequest {
    /// Remote config URL
    #[serde(skip_serializing_if = "Option::is_none")]
    pub config_url: Option<String>,
+
+    // ============ Usage script fields (v3.9+) ============
+    /// Whether to enable usage query (default: true if usage_script is provided)
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub usage_enabled: Option<bool>,
+    /// Base64 encoded usage query script code
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub usage_script: Option<String>,
+    /// Usage query API key (if different from provider API key)
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub usage_api_key: Option<String>,
+    /// Usage query base URL (if different from provider endpoint)
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub usage_base_url: Option<String>,
+    /// Usage query access token (for NewAPI template)
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub usage_access_token: Option<String>,
+    /// Usage query user ID (for NewAPI template)
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub usage_user_id: Option<String>,
+    /// Auto query interval in minutes (0 to disable)
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub usage_auto_interval: Option<u64>,
 }
@@ -122,6 +122,19 @@ fn parse_provider_deeplink(
    let config_url = params.get("configUrl").cloned();
    let enabled = params.get("enabled").and_then(|v| v.parse::<bool>().ok());

+    // Extract usage script fields (v3.9+)
+    let usage_enabled = params
+        .get("usageEnabled")
+        .and_then(|v| v.parse::<bool>().ok());
+    let usage_script = params.get("usageScript").cloned();
+    let usage_api_key = params.get("usageApiKey").cloned();
+    let usage_base_url = params.get("usageBaseUrl").cloned();
+    let usage_access_token = params.get("usageAccessToken").cloned();
+    let usage_user_id = params.get("usageUserId").cloned();
+    let usage_auto_interval = params
+        .get("usageAutoInterval")
+        .and_then(|v| v.parse::<u64>().ok());
+
    Ok(DeepLinkImportRequest {
        version,
        resource,
@@ -146,6 +159,13 @@ fn parse_provider_deeplink(
        config,
        config_format,
        config_url,
+        usage_enabled,
+        usage_script,
+        usage_api_key,
+        usage_base_url,
+        usage_access_token,
+        usage_user_id,
+        usage_auto_interval,
    })
 }

@@ -206,6 +226,13 @@ fn parse_prompt_deeplink(
        config: None,
        config_format: None,
        config_url: None,
+        usage_enabled: None,
+        usage_script: None,
+        usage_api_key: None,
+        usage_base_url: None,
+        usage_access_token: None,
+        usage_user_id: None,
+        usage_auto_interval: None,
    })
 }

@@ -261,6 +288,13 @@ fn parse_mcp_deeplink(
        directory: None,
        branch: None,
        config_url: None,
+        usage_enabled: None,
+        usage_script: None,
+        usage_api_key: None,
+        usage_base_url: None,
+        usage_access_token: None,
+        usage_user_id: None,
+        usage_auto_interval: None,
    })
 }

@@ -309,5 +343,12 @@ fn parse_skill_deeplink(
        config: None,
        config_format: None,
        config_url: None,
+        usage_enabled: None,
+        usage_script: None,
+        usage_api_key: None,
+        usage_base_url: None,
+        usage_access_token: None,
+        usage_user_id: None,
+        usage_auto_interval: None,
    })
 }
@@ -5,7 +5,7 @@
 use super::utils::{decode_base64_param, infer_homepage_from_endpoint};
 use super::DeepLinkImportRequest;
 use crate::error::AppError;
-use crate::provider::Provider;
+use crate::provider::{Provider, ProviderMeta, UsageScript};
 use crate::services::ProviderService;
 use crate::store::AppState;
 use crate::AppType;
@@ -117,6 +117,9 @@ pub(crate) fn build_provider_from_request(
        AppType::Gemini => build_gemini_settings(request),
    };

+    // Build usage script configuration if provided
+    let meta = build_provider_meta(request)?;
+
    let provider = Provider {
        id: String::new(), // Will be generated by caller
        name: request.name.clone().unwrap_or_default(),
@@ -126,15 +129,65 @@ pub(crate) fn build_provider_from_request(
        created_at: None,
        sort_index: None,
        notes: request.notes.clone(),
-        meta: None,
+        meta,
        icon: request.icon.clone(),
        icon_color: None,
-        is_proxy_target: None,
    };

    Ok(provider)
 }

+/// Build provider meta with usage script configuration
+fn build_provider_meta(request: &DeepLinkImportRequest) -> Result<Option<ProviderMeta>, AppError> {
+    // Check if any usage script fields are provided
+    if request.usage_script.is_none()
+        && request.usage_enabled.is_none()
+        && request.usage_api_key.is_none()
+        && request.usage_base_url.is_none()
+        && request.usage_access_token.is_none()
+        && request.usage_user_id.is_none()
+        && request.usage_auto_interval.is_none()
+    {
+        return Ok(None);
+    }
+
+    // Decode usage script code if provided
+    let code = if let Some(script_b64) = &request.usage_script {
+        let decoded = decode_base64_param("usage_script", script_b64)?;
+        String::from_utf8(decoded)
+            .map_err(|e| AppError::InvalidInput(format!("Invalid UTF-8 in usage_script: {e}")))?
+    } else {
+        String::new()
+    };
+
+    // Determine enabled state: explicit param > has code > false
+    let enabled = request.usage_enabled.unwrap_or(!code.is_empty());
+
+    // Build UsageScript - use provider's API key and endpoint as defaults
+    let usage_script = UsageScript {
+        enabled,
+        language: "javascript".to_string(),
+        code,
+        timeout: Some(10),
+        api_key: request
+            .usage_api_key
+            .clone()
+            .or_else(|| request.api_key.clone()),
+        base_url: request
+            .usage_base_url
+            .clone()
+            .or_else(|| request.endpoint.clone()),
+        access_token: request.usage_access_token.clone(),
+        user_id: request.usage_user_id.clone(),
+        auto_query_interval: request.usage_auto_interval,
+    };
+
+    Ok(Some(ProviderMeta {
+        usage_script: Some(usage_script),
+        ..Default::default()
+    }))
+}
+
 /// Build Claude settings configuration
 fn build_claude_settings(request: &DeepLinkImportRequest) -> serde_json::Value {
    let mut env = serde_json::Map::new();
@@ -145,6 +145,13 @@ fn test_build_gemini_provider_with_model() {
        content: None,
        description: None,
        enabled: None,
+        usage_enabled: None,
+        usage_script: None,
+        usage_api_key: None,
+        usage_base_url: None,
+        usage_access_token: None,
+        usage_user_id: None,
+        usage_auto_interval: None,
    };

    let provider = build_provider_from_request(&AppType::Gemini, &request).unwrap();
@@ -191,6 +198,13 @@ fn test_build_gemini_provider_without_model() {
        content: None,
        description: None,
        enabled: None,
+        usage_enabled: None,
+        usage_script: None,
+        usage_api_key: None,
+        usage_base_url: None,
+        usage_access_token: None,
+        usage_user_id: None,
+        usage_auto_interval: None,
    };

    let provider = build_provider_from_request(&AppType::Gemini, &request).unwrap();
@@ -232,6 +246,13 @@ fn test_parse_and_merge_config_claude() {
        content: None,
        description: None,
        enabled: None,
+        usage_enabled: None,
+        usage_script: None,
+        usage_api_key: None,
+        usage_base_url: None,
+        usage_access_token: None,
+        usage_user_id: None,
+        usage_auto_interval: None,
    };

    let merged = parse_and_merge_config(&request).unwrap();
@@ -275,6 +296,13 @@ fn test_parse_and_merge_config_url_override() {
        content: None,
        description: None,
        enabled: None,
+        usage_enabled: None,
+        usage_script: None,
+        usage_api_key: None,
+        usage_base_url: None,
+        usage_access_token: None,
+        usage_user_id: None,
+        usage_auto_interval: None,
    };

    let merged = parse_and_merge_config(&request).unwrap();
@@ -42,8 +42,8 @@ fn write_json_value(path: &Path, value: &Value) -> Result<(), AppError> {
 ///
 /// 执行反向格式转换以保持与统一 MCP 结构的兼容性：
 /// - httpUrl → url + type: "http"
-/// - 仅有 url 字段 → 保持不变（SSE 类型）
-/// - 仅有 command 字段 → 保持不变（stdio 类型）
+/// - 仅有 url 字段 → 补齐 type: "sse"（Gemini 以字段名推断传输类型）
+/// - 仅有 command 字段 → 补齐 type: "stdio"
 pub fn read_mcp_servers_map() -> Result<std::collections::HashMap<String, Value>, AppError> {
    let path = user_config_path();
    if !path.exists() {
@@ -65,8 +65,15 @@ pub fn read_mcp_servers_map() -> Result<std::collections::HashMap<String, Value>
                obj.insert("url".to_string(), http_url);
                obj.insert("type".to_string(), Value::String("http".to_string()));
            }
-            // 如果有 url 但没有 type，不添加 type（默认为 SSE）
-            // 如果有 command 但没有 type，不添加 type（默认为 stdio）
+
+            // Gemini CLI 不使用 type 字段：这里补齐成统一结构，便于校验与导入
+            if obj.get("type").is_none() {
+                if obj.contains_key("command") {
+                    obj.insert("type".to_string(), Value::String("stdio".to_string()));
+                } else if obj.contains_key("url") {
+                    obj.insert("type".to_string(), Value::String("sse".to_string()));
+                }
+            }
        }
    }

@@ -39,8 +39,8 @@ pub use mcp::{
 };
 pub use provider::{Provider, ProviderMeta};
 pub use services::{
-    ConfigService, EndpointLatency, McpService, PromptService, ProviderService, SkillService,
-    SpeedtestService,
+    ConfigService, EndpointLatency, McpService, PromptService, ProviderService, ProxyService,
+    SkillService, SpeedtestService,
 };
 pub use settings::{update_settings, AppSettings};
 pub use store::AppState;
@@ -49,7 +49,6 @@ use tauri_plugin_dialog::{DialogExt, MessageDialogButtons, MessageDialogKind};

 use std::sync::Arc;
 use tauri::tray::{TrayIconBuilder, TrayIconEvent};
-#[cfg(target_os = "macos")]
 use tauri::RunEvent;
 use tauri::{Emitter, Manager};

@@ -332,6 +331,9 @@ pub fn run() {

            let app_state = AppState::new(db);

+            // 设置 AppHandle 用于代理故障转移时的 UI 更新
+            app_state.proxy_service.set_app_handle(app.handle().clone());
+
            // ============================================================
            // 按表独立判断的导入逻辑（各类数据独立检查，互不影响）
            // ============================================================
@@ -522,25 +524,69 @@ pub fn run() {
                }
            }

-            // 自动启动代理服务器
+            // 异常退出恢复 + 自动启动代理服务器
            let app_handle = app.handle().clone();
            tauri::async_runtime::spawn(async move {
                let state = app_handle.state::<AppState>();
-                match state.db.get_proxy_config().await {
-                    Ok(config) => {
-                        if config.enabled {
-                            log::info!("代理服务配置为启用，正在启动...");
-                            match state.proxy_service.start().await {
-                                Ok(info) => log::info!(
-                                    "代理服务器自动启动成功: {}:{}",
-                                    info.address,
-                                    info.port
-                                ),
-                                Err(e) => log::error!("代理服务器自动启动失败: {e}"),
+
+                // 检查是否有 Live 备份（表示上次有接管状态）
+                let has_backups = match state.db.has_any_live_backup().await {
+                    Ok(v) => v,
+                    Err(e) => {
+                        log::error!("检查 Live 备份失败: {e}");
+                        false
+                    }
+                };
+
+                // 获取代理配置
+                let proxy_config = match state.db.get_proxy_config().await {
+                    Ok(config) => Some(config),
+                    Err(e) => {
+                        log::error!("启动时获取代理配置失败: {e}");
+                        None
+                    }
+                };
+
+                if has_backups {
+                    // 有备份说明上次退出时有接管状态
+                    // 检查 Live 配置是否仍处于被接管状态（包含占位符）
+                    let live_taken_over = state.proxy_service.detect_takeover_in_live_configs();
+
+                    if live_taken_over {
+                        // Live 配置仍是接管状态，尝试重新启动代理服务以恢复接管
+                        log::info!("检测到上次接管状态，正在重新启动代理服务...");
+                        match state.proxy_service.start(false).await {
+                            Ok(info) => {
+                                log::info!("代理服务器已恢复启动: {}:{}", info.address, info.port);
+                            }
+                            Err(e) => {
+                                // 启动失败，恢复 Live 配置
+                                log::error!("恢复代理服务失败: {e}，正在恢复 Live 配置...");
+                                if let Err(e) = state.proxy_service.recover_from_crash().await {
+                                    log::error!("恢复 Live 配置失败: {e}");
+                                } else {
+                                    log::info!("Live 配置已恢复");
+                                }
                            }
                        }
+                    } else {
+                        // Live 配置已经是正常状态，清理残留备份
+                        log::info!("Live 配置已是正常状态，清理残留备份...");
+                        if let Err(e) = state.db.delete_all_live_backups().await {
+                            log::warn!("清理残留 Live 备份失败: {e}");
+                        }
+                    }
+                } else if let Some(config) = proxy_config {
+                    // 没有备份，检查是否需要自动启动代理服务器（总开关）
+                    if config.enabled {
+                        log::info!("代理服务配置为启用，正在启动...");
+                        match state.proxy_service.start(true).await {
+                            Ok(info) => {
+                                log::info!("代理服务器自动启动成功: {}:{}", info.address, info.port)
+                            }
+                            Err(e) => log::error!("代理服务器自动启动失败: {e}"),
+                        }
                    }
-                    Err(e) => log::error!("启动时获取代理配置失败: {e}"),
                }
            });

@@ -553,7 +599,6 @@ pub fn run() {
            commands::update_provider,
            commands::delete_provider,
            commands::switch_provider,
-            commands::set_proxy_target_provider,
            commands::import_default_config,
            commands::get_claude_config_status,
            commands::get_config_status,
@@ -648,19 +693,29 @@ pub fn run() {
            commands::get_auto_launch_status,
            // Proxy server management
            commands::start_proxy_server,
-            commands::stop_proxy_server,
+            commands::start_proxy_with_takeover,
+            commands::stop_proxy_with_restore,
+            commands::get_proxy_takeover_status,
+            commands::set_proxy_takeover_for_app,
            commands::get_proxy_status,
            commands::get_proxy_config,
            commands::update_proxy_config,
            commands::is_proxy_running,
+            commands::is_live_takeover_active,
+            commands::switch_proxy_provider,
            // Proxy failover commands
-            commands::get_proxy_targets,
-            commands::set_proxy_target,
            commands::get_provider_health,
            commands::reset_circuit_breaker,
            commands::get_circuit_breaker_config,
            commands::update_circuit_breaker_config,
            commands::get_circuit_breaker_stats,
+            // Failover queue management
+            commands::get_failover_queue,
+            commands::get_available_providers_for_failover,
+            commands::add_to_failover_queue,
+            commands::remove_from_failover_queue,
+            commands::reorder_failover_queue,
+            commands::set_failover_item_enabled,
            // Usage statistics
            commands::get_usage_summary,
            commands::get_usage_trends,
@@ -672,13 +727,11 @@ pub fn run() {
            commands::update_model_pricing,
            commands::delete_model_pricing,
            commands::check_provider_limits,
-            // Model testing
-            commands::test_provider_model,
-            commands::test_all_providers_model,
-            commands::get_model_test_config,
-            commands::save_model_test_config,
-            commands::get_model_test_logs,
-            commands::cleanup_model_test_logs,
+            // Stream health check
+            commands::stream_check_provider,
+            commands::stream_check_all_providers,
+            commands::get_stream_check_config,
+            commands::save_stream_check_config,
            commands::get_tool_versions,
        ]);

@@ -687,6 +740,26 @@ pub fn run() {
        .expect("error while running tauri application");

    app.run(|app_handle, event| {
+        // 处理退出请求（所有平台）
+        if let RunEvent::ExitRequested { api, .. } = &event {
+            log::info!("收到退出请求，开始清理...");
+            // 阻止立即退出，执行清理
+            api.prevent_exit();
+
+            let app_handle = app_handle.clone();
+            tauri::async_runtime::spawn(async move {
+                cleanup_before_exit(&app_handle).await;
+                log::info!("清理完成，退出应用");
+
+                // 短暂等待确保所有 I/O 操作（如数据库写入）刷新到磁盘
+                tokio::time::sleep(std::time::Duration::from_millis(100)).await;
+
+                // 使用 std::process::exit 避免再次触发 ExitRequested
+                std::process::exit(0);
+            });
+            return;
+        }
+
        #[cfg(target_os = "macos")]
        {
            match event {
@@ -766,6 +839,44 @@ pub fn run() {
    });
 }

+// ============================================================
+// 应用退出清理
+// ============================================================
+
+/// 应用退出前的清理工作
+///
+/// 在应用退出前检查代理服务器状态，如果正在运行则停止代理并恢复 Live 配置。
+/// 确保 Claude Code/Codex/Gemini 的配置不会处于损坏状态。
+pub async fn cleanup_before_exit(app_handle: &tauri::AppHandle) {
+    if let Some(state) = app_handle.try_state::<store::AppState>() {
+        let proxy_service = &state.proxy_service;
+
+        // 检查代理是否在运行
+        if proxy_service.is_running().await {
+            log::info!("检测到代理服务器正在运行，开始清理...");
+
+            // 检查是否处于 Live 接管模式
+            if let Ok(is_takeover) = state.db.is_live_takeover_active().await {
+                if is_takeover {
+                    // 接管模式：停止并恢复配置
+                    if let Err(e) = proxy_service.stop_with_restore().await {
+                        log::error!("退出时恢复 Live 配置失败: {e}");
+                    } else {
+                        log::info!("已恢复 Live 配置");
+                    }
+                } else {
+                    // 非接管模式：仅停止代理
+                    if let Err(e) = proxy_service.stop().await {
+                        log::error!("退出时停止代理失败: {e}");
+                    }
+                }
+            }
+
+            log::info!("代理服务器清理完成");
+        }
+    }
+}
+
 // ============================================================
 // 迁移错误对话框辅助函数
 // ============================================================
@@ -8,6 +8,12 @@ use crate::error::AppError;

 use super::validation::{extract_server_spec, validate_server_spec};

+fn should_sync_claude_mcp() -> bool {
+    // Claude 未安装/未初始化时：通常 ~/.claude 目录与 ~/.claude.json 都不存在。
+    // 按用户偏好：此时跳过写入/删除，不创建任何文件或目录。
+    crate::config::get_claude_config_dir().exists() || crate::config::get_claude_mcp_path().exists()
+}
+
 /// 返回已启用的 MCP 服务器（过滤 enabled==true）
 fn collect_enabled_servers(cfg: &McpConfig) -> HashMap<String, Value> {
    let mut out = HashMap::new();
@@ -33,6 +39,9 @@ fn collect_enabled_servers(cfg: &McpConfig) -> HashMap<String, Value> {

 /// 将 config.json 中 enabled==true 的项投影写入 ~/.claude.json
 pub fn sync_enabled_to_claude(config: &MultiAppConfig) -> Result<(), AppError> {
+    if !should_sync_claude_mcp() {
+        return Ok(());
+    }
    let enabled = collect_enabled_servers(&config.mcp.claude);
    crate::claude_mcp::set_mcp_servers_map(&enabled)
 }
@@ -107,6 +116,9 @@ pub fn sync_single_server_to_claude(
    id: &str,
    server_spec: &Value,
 ) -> Result<(), AppError> {
+    if !should_sync_claude_mcp() {
+        return Ok(());
+    }
    // 读取现有的 MCP 配置
    let current = crate::claude_mcp::read_mcp_servers_map()?;

@@ -120,6 +132,9 @@ pub fn sync_single_server_to_claude(

 /// 从 Claude live 配置中移除单个 MCP 服务器
 pub fn remove_server_from_claude(id: &str) -> Result<(), AppError> {
+    if !should_sync_claude_mcp() {
+        return Ok(());
+    }
    // 读取现有的 MCP 配置
    let mut current = crate::claude_mcp::read_mcp_servers_map()?;

@@ -13,6 +13,12 @@ use crate::error::AppError;

 use super::validation::{extract_server_spec, validate_server_spec};

+fn should_sync_codex_mcp() -> bool {
+    // Codex 未安装/未初始化时：~/.codex 目录不存在。
+    // 按用户偏好：目录缺失时跳过写入/删除，不创建任何文件或目录。
+    crate::codex_config::get_codex_config_dir().exists()
+}
+
 /// 返回已启用的 MCP 服务器（过滤 enabled==true）
 fn collect_enabled_servers(cfg: &McpConfig) -> HashMap<String, Value> {
    let mut out = HashMap::new();
@@ -273,6 +279,9 @@ pub fn import_from_codex(config: &mut MultiAppConfig) -> Result<usize, AppError>
 /// - 仅更新 `mcp_servers` 表，保留其它键
 /// - 仅写入启用项；无启用项时清理 mcp_servers 表
 pub fn sync_enabled_to_codex(config: &MultiAppConfig) -> Result<(), AppError> {
+    if !should_sync_codex_mcp() {
+        return Ok(());
+    }
    use toml_edit::{Item, Table};

    // 1) 收集启用项（Codex 维度）
@@ -339,6 +348,9 @@ pub fn sync_single_server_to_codex(
    id: &str,
    server_spec: &Value,
 ) -> Result<(), AppError> {
+    if !should_sync_codex_mcp() {
+        return Ok(());
+    }
    use toml_edit::Item;

    // 读取现有的 config.toml
@@ -376,7 +388,8 @@ pub fn sync_single_server_to_codex(
    doc["mcp_servers"][id] = Item::Table(toml_table);

    // 写回文件
-    std::fs::write(&config_path, doc.to_string()).map_err(|e| AppError::io(&config_path, e))?;
+    let new_text = doc.to_string();
+    crate::config::write_text_file(&config_path, &new_text)?;

    Ok(())
 }
@@ -384,6 +397,9 @@ pub fn sync_single_server_to_codex(
 /// 从 Codex live 配置中移除单个 MCP 服务器
 /// 从正确的 [mcp_servers] 表中删除，同时清理可能存在于错误位置 [mcp.servers] 的数据
 pub fn remove_server_from_codex(id: &str) -> Result<(), AppError> {
+    if !should_sync_codex_mcp() {
+        return Ok(());
+    }
    let config_path = crate::codex_config::get_codex_config_path();

    if !config_path.exists() {
@@ -412,7 +428,8 @@ pub fn remove_server_from_codex(id: &str) -> Result<(), AppError> {
    }

    // 写回文件
-    std::fs::write(&config_path, doc.to_string()).map_err(|e| AppError::io(&config_path, e))?;
+    let new_text = doc.to_string();
+    crate::config::write_text_file(&config_path, &new_text)?;

    Ok(())
 }
@@ -8,6 +8,12 @@ use crate::error::AppError;

 use super::validation::{extract_server_spec, validate_server_spec};

+fn should_sync_gemini_mcp() -> bool {
+    // Gemini 未安装/未初始化时：~/.gemini 目录不存在。
+    // 按用户偏好：目录缺失时跳过写入/删除，不创建任何文件或目录。
+    crate::gemini_config::get_gemini_dir().exists()
+}
+
 /// 返回已启用的 MCP 服务器（过滤 enabled==true）
 fn collect_enabled_servers(cfg: &McpConfig) -> HashMap<String, Value> {
    let mut out = HashMap::new();
@@ -33,6 +39,9 @@ fn collect_enabled_servers(cfg: &McpConfig) -> HashMap<String, Value> {

 /// 将 config.json 中 Gemini 的 enabled==true 项写入 Gemini MCP 配置
 pub fn sync_enabled_to_gemini(config: &MultiAppConfig) -> Result<(), AppError> {
+    if !should_sync_gemini_mcp() {
+        return Ok(());
+    }
    let enabled = collect_enabled_servers(&config.mcp.gemini);
    crate::gemini_mcp::set_mcp_servers_map(&enabled)
 }
@@ -103,6 +112,9 @@ pub fn sync_single_server_to_gemini(
    id: &str,
    server_spec: &Value,
 ) -> Result<(), AppError> {
+    if !should_sync_gemini_mcp() {
+        return Ok(());
+    }
    // 读取现有的 MCP 配置
    let mut current = crate::gemini_mcp::read_mcp_servers_map()?;

@@ -115,6 +127,9 @@ pub fn sync_single_server_to_gemini(

 /// 从 Gemini live 配置中移除单个 MCP 服务器
 pub fn remove_server_from_gemini(id: &str) -> Result<(), AppError> {
+    if !should_sync_gemini_mcp() {
+        return Ok(());
+    }
    // 读取现有的 MCP 配置
    let mut current = crate::gemini_mcp::read_mcp_servers_map()?;

@@ -36,10 +36,6 @@ pub struct Provider {
    #[serde(skip_serializing_if = "Option::is_none")]
    #[serde(rename = "iconColor")]
    pub icon_color: Option<String>,
-    /// 是否为代理目标（数据库专用字段，不写入配置文件）
-    #[serde(skip_serializing_if = "Option::is_none")]
-    #[serde(rename = "isProxyTarget")]
-    pub is_proxy_target: Option<bool>,
 }

 impl Provider {
@@ -62,7 +58,6 @@ impl Provider {
            meta: None,
            icon: None,
            icon_color: None,
-            is_proxy_target: None,
        }
    }
 }
@@ -72,8 +72,20 @@ pub struct CircuitBreaker {
    failed_requests: Arc<AtomicU32>,
    /// 上次打开时间
    last_opened_at: Arc<RwLock<Option<Instant>>>,
-    /// 配置
-    config: CircuitBreakerConfig,
+    /// 配置（支持热更新）
+    config: Arc<RwLock<CircuitBreakerConfig>>,
+    /// 半开状态已放行的请求数（用于限流）
+    half_open_requests: Arc<AtomicU32>,
+}
+
+/// 熔断器放行结果
+///
+/// `used_half_open_permit` 表示本次放行是否占用了 HalfOpen 探测名额。
+/// 调用方应在请求结束后把该值传回 `record_success` / `record_failure` 用于正确释放名额。
+#[derive(Debug, Clone, Copy)]
+pub struct AllowResult {
+    pub allowed: bool,
+    pub used_half_open_permit: bool,
 }

 impl CircuitBreaker {
@@ -86,20 +98,35 @@ impl CircuitBreaker {
            total_requests: Arc::new(AtomicU32::new(0)),
            failed_requests: Arc::new(AtomicU32::new(0)),
            last_opened_at: Arc::new(RwLock::new(None)),
-            config,
+            config: Arc::new(RwLock::new(config)),
+            half_open_requests: Arc::new(AtomicU32::new(0)),
        }
    }

-    /// 检查是否允许请求通过
-    pub async fn allow_request(&self) -> bool {
+    /// 更新熔断器配置（热更新，不重置状态）
+    pub async fn update_config(&self, new_config: CircuitBreakerConfig) {
+        *self.config.write().await = new_config;
+        log::debug!("Circuit breaker config updated");
+    }
+
+    /// 判断当前 Provider 是否“可被纳入候选链路”
+    ///
+    /// 这个方法不会占用 HalfOpen 探测名额，仅用于路由选择阶段的“可用性判断”：
+    /// - Closed / HalfOpen：可用（返回 true）
+    /// - Open：若超时到达则切到 HalfOpen 并返回 true，否则返回 false
+    ///
+    /// 注意：真正发起请求前仍需调用 `allow_request()` 来获取 HalfOpen 探测名额，
+    /// 并在请求结束后通过 `record_success()` / `record_failure()` 释放。
+    pub async fn is_available(&self) -> bool {
        let state = *self.state.read().await;
+        let config = self.config.read().await;

        match state {
-            CircuitState::Closed => true,
+            CircuitState::Closed | CircuitState::HalfOpen => true,
            CircuitState::Open => {
-                // 检查是否应该尝试半开
                if let Some(opened_at) = *self.last_opened_at.read().await {
-                    if opened_at.elapsed().as_secs() >= self.config.timeout_seconds {
+                    if opened_at.elapsed().as_secs() >= config.timeout_seconds {
+                        drop(config); // 释放读锁再转换状态
                        log::info!(
                            "Circuit breaker transitioning from Open to HalfOpen (timeout reached)"
                        );
@@ -109,13 +136,62 @@ impl CircuitBreaker {
                }
                false
            }
-            CircuitState::HalfOpen => true,
+        }
+    }
+
+    /// 检查是否允许请求通过
+    pub async fn allow_request(&self) -> AllowResult {
+        let state = *self.state.read().await;
+
+        match state {
+            CircuitState::Closed => AllowResult {
+                allowed: true,
+                used_half_open_permit: false,
+            },
+            CircuitState::Open => {
+                let config = self.config.read().await;
+                // 检查是否应该尝试半开
+                if let Some(opened_at) = *self.last_opened_at.read().await {
+                    if opened_at.elapsed().as_secs() >= config.timeout_seconds {
+                        drop(config); // 释放读锁再转换状态
+                        log::info!(
+                            "Circuit breaker transitioning from Open to HalfOpen (timeout reached)"
+                        );
+                        self.transition_to_half_open().await;
+
+                        // 转换后按当前状态决定是否需要获取 HalfOpen 探测名额
+                        let current_state = *self.state.read().await;
+                        return match current_state {
+                            CircuitState::Closed => AllowResult {
+                                allowed: true,
+                                used_half_open_permit: false,
+                            },
+                            CircuitState::HalfOpen => self.allow_half_open_probe(),
+                            CircuitState::Open => AllowResult {
+                                allowed: false,
+                                used_half_open_permit: false,
+                            },
+                        };
+                    }
+                }
+
+                AllowResult {
+                    allowed: false,
+                    used_half_open_permit: false,
+                }
+            }
+            CircuitState::HalfOpen => self.allow_half_open_probe(),
        }
    }

    /// 记录成功
-    pub async fn record_success(&self) {
+    pub async fn record_success(&self, used_half_open_permit: bool) {
        let state = *self.state.read().await;
+        let config = self.config.read().await;
+
+        if used_half_open_permit {
+            self.release_half_open_permit();
+        }

        // 重置失败计数
        self.consecutive_failures.store(0, Ordering::SeqCst);
@@ -127,10 +203,11 @@ impl CircuitBreaker {
                log::debug!(
                    "Circuit breaker HalfOpen: {} consecutive successes (threshold: {})",
                    successes,
-                    self.config.success_threshold
+                    config.success_threshold
                );

-                if successes >= self.config.success_threshold {
+                if successes >= config.success_threshold {
+                    drop(config); // 释放读锁再转换状态
                    log::info!("Circuit breaker transitioning from HalfOpen to Closed (success threshold reached)");
                    self.transition_to_closed().await;
                }
@@ -143,8 +220,13 @@ impl CircuitBreaker {
    }

    /// 记录失败
-    pub async fn record_failure(&self) {
+    pub async fn record_failure(&self, used_half_open_permit: bool) {
        let state = *self.state.read().await;
+        let config = self.config.read().await;
+
+        if used_half_open_permit {
+            self.release_half_open_permit();
+        }

        // 更新计数器
        let failures = self.consecutive_failures.fetch_add(1, Ordering::SeqCst) + 1;
@@ -158,26 +240,33 @@ impl CircuitBreaker {
            "Circuit breaker {:?}: {} consecutive failures (threshold: {})",
            state,
            failures,
-            self.config.failure_threshold
+            config.failure_threshold
        );

        // 检查是否应该打开熔断器
        match state {
-            CircuitState::Closed | CircuitState::HalfOpen => {
+            CircuitState::HalfOpen => {
+                // HalfOpen 状态下失败，立即转为 Open
+                log::warn!("Circuit breaker HalfOpen probe failed, transitioning to Open");
+                drop(config);
+                self.transition_to_open().await;
+            }
+            CircuitState::Closed => {
                // 检查连续失败次数
-                if failures >= self.config.failure_threshold {
+                if failures >= config.failure_threshold {
                    log::warn!(
                        "Circuit breaker opening due to {} consecutive failures (threshold: {})",
                        failures,
-                        self.config.failure_threshold
+                        config.failure_threshold
                    );
+                    drop(config); // 释放读锁再转换状态
                    self.transition_to_open().await;
                } else {
                    // 检查错误率
                    let total = self.total_requests.load(Ordering::SeqCst);
                    let failed = self.failed_requests.load(Ordering::SeqCst);

-                    if total >= self.config.min_requests {
+                    if total >= config.min_requests {
                        let error_rate = failed as f64 / total as f64;
                        log::debug!(
                            "Circuit breaker error rate: {:.2}% ({}/{} requests)",
@@ -186,12 +275,13 @@ impl CircuitBreaker {
                            total
                        );

-                        if error_rate >= self.config.error_rate_threshold {
+                        if error_rate >= config.error_rate_threshold {
                            log::warn!(
                                "Circuit breaker opening due to high error rate: {:.2}% (threshold: {:.2}%)",
                                error_rate * 100.0,
-                                self.config.error_rate_threshold * 100.0
+                                config.error_rate_threshold * 100.0
                            );
+                            drop(config); // 释放读锁再转换状态
                            self.transition_to_open().await;
                        }
                    }
@@ -202,6 +292,7 @@ impl CircuitBreaker {
    }

    /// 获取当前状态
+    #[allow(dead_code)]
    pub async fn get_state(&self) -> CircuitState {
        *self.state.read().await
    }
@@ -225,6 +316,56 @@ impl CircuitBreaker {
        self.transition_to_closed().await;
    }

+    fn allow_half_open_probe(&self) -> AllowResult {
+        // 半开状态限流：只允许有限请求通过进行探测
+        // 默认最多允许 1 个请求（可在配置中扩展）
+        let max_half_open_requests = 1u32;
+        let current = self.half_open_requests.fetch_add(1, Ordering::SeqCst);
+
+        if current < max_half_open_requests {
+            log::debug!(
+                "Circuit breaker HalfOpen: allowing probe request ({}/{})",
+                current + 1,
+                max_half_open_requests
+            );
+            AllowResult {
+                allowed: true,
+                used_half_open_permit: true,
+            }
+        } else {
+            // 超过限额，回退计数，拒绝请求
+            self.half_open_requests.fetch_sub(1, Ordering::SeqCst);
+            log::debug!(
+                "Circuit breaker HalfOpen: rejecting request (limit reached: {max_half_open_requests})"
+            );
+            AllowResult {
+                allowed: false,
+                used_half_open_permit: false,
+            }
+        }
+    }
+
+    fn release_half_open_permit(&self) {
+        let mut current = self.half_open_requests.load(Ordering::SeqCst);
+        loop {
+            if current == 0 {
+                // 理论上不应该发生：说明调用方传入的 used_half_open_permit 与实际占用不一致
+                log::debug!("Circuit breaker HalfOpen permit already released (counter=0)");
+                return;
+            }
+
+            match self.half_open_requests.compare_exchange(
+                current,
+                current - 1,
+                Ordering::SeqCst,
+                Ordering::SeqCst,
+            ) {
+                Ok(_) => return,
+                Err(actual) => current = actual,
+            }
+        }
+    }
+
    /// 转换到打开状态
    async fn transition_to_open(&self) {
        *self.state.write().await = CircuitState::Open;
@@ -235,8 +376,15 @@ impl CircuitBreaker {

    /// 转换到半开状态
    async fn transition_to_half_open(&self) {
-        *self.state.write().await = CircuitState::HalfOpen;
+        let mut state = self.state.write().await;
+        if *state != CircuitState::Open {
+            return;
+        }
+
+        *state = CircuitState::HalfOpen;
        self.consecutive_successes.store(0, Ordering::SeqCst);
+        // 重置半开状态的请求限流计数
+        self.half_open_requests.store(0, Ordering::SeqCst);
    }

    /// 转换到关闭状态
@@ -275,16 +423,16 @@ mod tests {

        // 初始状态应该是关闭
        assert_eq!(breaker.get_state().await, CircuitState::Closed);
-        assert!(breaker.allow_request().await);
+        assert!(breaker.allow_request().await.allowed);

        // 记录 3 次失败
        for _ in 0..3 {
-            breaker.record_failure().await;
+            breaker.record_failure(false).await;
        }

        // 应该转换到打开状态
        assert_eq!(breaker.get_state().await, CircuitState::Open);
-        assert!(!breaker.allow_request().await);
+        assert!(!breaker.allow_request().await.allowed);
    }

    #[tokio::test]
@@ -297,8 +445,8 @@ mod tests {
        let breaker = CircuitBreaker::new(config);

        // 打开熔断器
-        breaker.record_failure().await;
-        breaker.record_failure().await;
+        breaker.record_failure(false).await;
+        breaker.record_failure(false).await;
        assert_eq!(breaker.get_state().await, CircuitState::Open);

        // 手动转换到半开状态
@@ -306,13 +454,37 @@ mod tests {
        assert_eq!(breaker.get_state().await, CircuitState::HalfOpen);

        // 记录 2 次成功
-        breaker.record_success().await;
-        breaker.record_success().await;
+        breaker.record_success(false).await;
+        breaker.record_success(false).await;

        // 应该转换到关闭状态
        assert_eq!(breaker.get_state().await, CircuitState::Closed);
    }

+    #[tokio::test]
+    async fn test_half_open_transition_does_not_reset_inflight_permit() {
+        let config = CircuitBreakerConfig {
+            timeout_seconds: 0,
+            ..Default::default()
+        };
+        let breaker = CircuitBreaker::new(config);
+
+        // 进入 Open，然后由于 timeout_seconds=0，allow_request 会立即切换到 HalfOpen 并占用探测名额
+        breaker.transition_to_open().await;
+        let first = breaker.allow_request().await;
+        assert!(first.allowed);
+        assert!(first.used_half_open_permit);
+        assert_eq!(breaker.get_state().await, CircuitState::HalfOpen);
+
+        // 模拟并发下的“重复 HalfOpen 转换调用”，不应重置 in-flight 计数
+        breaker.transition_to_half_open().await;
+
+        // 由于名额仍被占用，第二次请求应被拒绝
+        let second = breaker.allow_request().await;
+        assert!(!second.allowed);
+        assert!(!second.used_half_open_permit);
+    }
+
    #[tokio::test]
    async fn test_circuit_breaker_reset() {
        let config = CircuitBreakerConfig {
@@ -322,13 +494,13 @@ mod tests {
        let breaker = CircuitBreaker::new(config);

        // 打开熔断器
-        breaker.record_failure().await;
-        breaker.record_failure().await;
+        breaker.record_failure(false).await;
+        breaker.record_failure(false).await;
        assert_eq!(breaker.get_state().await, CircuitState::Open);

        // 重置
        breaker.reset().await;
        assert_eq!(breaker.get_state().await, CircuitState::Closed);
-        assert!(breaker.allow_request().await);
+        assert!(breaker.allow_request().await.allowed);
    }
 }
@@ -0,0 +1,110 @@
+//! 错误类型到 HTTP 状态码的映射
+//!
+//! 将 ProxyError 映射到合适的 HTTP 状态码，用于日志记录
+
+use super::ProxyError;
+
+/// 将 ProxyError 映射到 HTTP 状态码
+///
+/// 映射规则：
+/// - 上游错误：直接使用上游返回的状态码
+/// - 超时：504 Gateway Timeout
+/// - 连接失败：502 Bad Gateway
+/// - 无可用 Provider：503 Service Unavailable
+/// - 重试耗尽：503 Service Unavailable
+/// - 其他错误：500 Internal Server Error
+pub fn map_proxy_error_to_status(error: &ProxyError) -> u16 {
+    match error {
+        // 上游错误：使用实际状态码
+        ProxyError::UpstreamError { status, .. } => *status,
+
+        // 超时错误：504 Gateway Timeout
+        ProxyError::Timeout(_) => 504,
+
+        // 转发失败/连接失败：502 Bad Gateway
+        ProxyError::ForwardFailed(_) => 502,
+
+        // 无可用 Provider：503 Service Unavailable
+        ProxyError::NoAvailableProvider => 503,
+
+        // 重试耗尽：503 Service Unavailable
+        ProxyError::MaxRetriesExceeded => 503,
+
+        // Provider 不健康：503 Service Unavailable
+        ProxyError::ProviderUnhealthy(_) => 503,
+
+        // 数据库错误：500 Internal Server Error
+        ProxyError::DatabaseError(_) => 500,
+
+        // 转换错误：500 Internal Server Error
+        ProxyError::TransformError(_) => 500,
+
+        // 其他未知错误：500 Internal Server Error
+        _ => 500,
+    }
+}
+
+/// 将 ProxyError 转换为用户友好的错误消息
+pub fn get_error_message(error: &ProxyError) -> String {
+    match error {
+        ProxyError::UpstreamError { status, body } => {
+            if let Some(body) = body {
+                format!("上游错误 ({status}): {body}")
+            } else {
+                format!("上游错误 ({status})")
+            }
+        }
+        ProxyError::Timeout(msg) => format!("请求超时: {msg}"),
+        ProxyError::ForwardFailed(msg) => format!("转发失败: {msg}"),
+        ProxyError::NoAvailableProvider => "无可用 Provider".to_string(),
+        ProxyError::MaxRetriesExceeded => "所有 Provider 都失败，重试耗尽".to_string(),
+        ProxyError::ProviderUnhealthy(msg) => format!("Provider 不健康: {msg}"),
+        ProxyError::DatabaseError(msg) => format!("数据库错误: {msg}"),
+        ProxyError::TransformError(msg) => format!("请求/响应转换错误: {msg}"),
+        _ => error.to_string(),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_map_upstream_error() {
+        let error = ProxyError::UpstreamError {
+            status: 401,
+            body: Some("Unauthorized".to_string()),
+        };
+        assert_eq!(map_proxy_error_to_status(&error), 401);
+    }
+
+    #[test]
+    fn test_map_timeout_error() {
+        let error = ProxyError::Timeout("Request timeout".to_string());
+        assert_eq!(map_proxy_error_to_status(&error), 504);
+    }
+
+    #[test]
+    fn test_map_connection_error() {
+        let error = ProxyError::ForwardFailed("Connection refused".to_string());
+        assert_eq!(map_proxy_error_to_status(&error), 502);
+    }
+
+    #[test]
+    fn test_map_no_provider_error() {
+        let error = ProxyError::NoAvailableProvider;
+        assert_eq!(map_proxy_error_to_status(&error), 503);
+    }
+
+    #[test]
+    fn test_get_error_message() {
+        let error = ProxyError::UpstreamError {
+            status: 500,
+            body: Some("Internal Server Error".to_string()),
+        };
+        let msg = get_error_message(&error);
+        assert!(msg.contains("上游错误"));
+        assert!(msg.contains("500"));
+        assert!(msg.contains("Internal Server Error"));
+    }
+}
@@ -0,0 +1,134 @@
+//! 故障转移切换模块
+//!
+//! 处理故障转移成功后的供应商切换逻辑，包括：
+//! - 去重控制（避免多个请求同时触发）
+//! - 数据库更新
+//! - 托盘菜单更新
+//! - 前端事件发射
+//! - Live 备份更新
+
+use crate::database::Database;
+use crate::error::AppError;
+use std::collections::HashSet;
+use std::str::FromStr;
+use std::sync::Arc;
+use tauri::{Emitter, Manager};
+use tokio::sync::RwLock;
+
+/// 故障转移切换管理器
+///
+/// 负责处理故障转移成功后的供应商切换，确保 UI 能够直观反映当前使用的供应商。
+#[derive(Clone)]
+pub struct FailoverSwitchManager {
+    /// 正在处理中的切换（key = "app_type:provider_id"）
+    pending_switches: Arc<RwLock<HashSet<String>>>,
+    db: Arc<Database>,
+}
+
+impl FailoverSwitchManager {
+    pub fn new(db: Arc<Database>) -> Self {
+        Self {
+            pending_switches: Arc::new(RwLock::new(HashSet::new())),
+            db,
+        }
+    }
+
+    /// 尝试执行故障转移切换
+    ///
+    /// 如果相同的切换已在进行中，则跳过；否则执行切换逻辑。
+    ///
+    /// # Returns
+    /// - `Ok(true)` - 切换成功执行
+    /// - `Ok(false)` - 切换已在进行中，跳过
+    /// - `Err(e)` - 切换过程中发生错误
+    pub async fn try_switch(
+        &self,
+        app_handle: Option<&tauri::AppHandle>,
+        app_type: &str,
+        provider_id: &str,
+        provider_name: &str,
+    ) -> Result<bool, AppError> {
+        let switch_key = format!("{app_type}:{provider_id}");
+
+        // 去重检查：如果相同切换已在进行中，跳过
+        {
+            let mut pending = self.pending_switches.write().await;
+            if pending.contains(&switch_key) {
+                log::debug!("[Failover] 切换已在进行中，跳过: {app_type} -> {provider_id}");
+                return Ok(false);
+            }
+            pending.insert(switch_key.clone());
+        }
+
+        // 执行切换（确保最后清理 pending 标记）
+        let result = self
+            .do_switch(app_handle, app_type, provider_id, provider_name)
+            .await;
+
+        // 清理 pending 标记
+        {
+            let mut pending = self.pending_switches.write().await;
+            pending.remove(&switch_key);
+        }
+
+        result
+    }
+
+    async fn do_switch(
+        &self,
+        app_handle: Option<&tauri::AppHandle>,
+        app_type: &str,
+        provider_id: &str,
+        provider_name: &str,
+    ) -> Result<bool, AppError> {
+        log::info!("[Failover] 开始切换供应商: {app_type} -> {provider_name} ({provider_id})");
+
+        // 1. 更新数据库 is_current
+        self.db.set_current_provider(app_type, provider_id)?;
+
+        // 2. 更新本地 settings（设备级）
+        let app_type_enum = crate::app_config::AppType::from_str(app_type)
+            .map_err(|_| AppError::Message(format!("无效的应用类型: {app_type}")))?;
+        crate::settings::set_current_provider(&app_type_enum, Some(provider_id))?;
+
+        // 3. 更新托盘菜单和发射事件
+        if let Some(app) = app_handle {
+            // 更新托盘菜单
+            if let Some(app_state) = app.try_state::<crate::store::AppState>() {
+                // 更新 Live 备份（确保代理停止时恢复正确配置）
+                if let Ok(Some(provider)) = self.db.get_provider_by_id(provider_id, app_type) {
+                    if let Err(e) = app_state
+                        .proxy_service
+                        .update_live_backup_from_provider(app_type, &provider)
+                        .await
+                    {
+                        log::warn!("[Failover] 更新 Live 备份失败: {e}");
+                    }
+                }
+
+                // 重建托盘菜单
+                if let Ok(new_menu) = crate::tray::create_tray_menu(app, app_state.inner()) {
+                    if let Some(tray) = app.tray_by_id("main") {
+                        if let Err(e) = tray.set_menu(Some(new_menu)) {
+                            log::error!("[Failover] 更新托盘菜单失败: {e}");
+                        }
+                    }
+                }
+            }
+
+            // 发射事件到前端
+            let event_data = serde_json::json!({
+                "appType": app_type,
+                "providerId": provider_id,
+                "source": "failover"  // 标识来源是故障转移
+            });
+            if let Err(e) = app.emit("provider-switched", event_data) {
+                log::error!("[Failover] 发射供应商切换事件失败: {e}");
+            }
+        }
+
+        log::info!("[Failover] 供应商切换完成: {app_type} -> {provider_name} ({provider_id})");
+
+        Ok(true)
+    }
+}
@@ -4,12 +4,13 @@

 use super::{
    error::*,
-    provider_router::ProviderRouter as NewProviderRouter,
+    failover_switch::FailoverSwitchManager,
+    provider_router::ProviderRouter,
    providers::{get_adapter, ProviderAdapter},
    types::ProxyStatus,
    ProxyError,
 };
-use crate::{app_config::AppType, database::Database, provider::Provider};
+use crate::{app_config::AppType, provider::Provider};
 use reqwest::{Client, Response};
 use serde_json::Value;
 use std::sync::Arc;
@@ -18,20 +19,30 @@ use tokio::sync::RwLock;

 pub struct RequestForwarder {
    client: Client,
-    router: Arc<NewProviderRouter>,
-    #[allow(dead_code)]
+    /// 共享的 ProviderRouter（持有熔断器状态）
+    router: Arc<ProviderRouter>,
+    /// 单个 Provider 内的最大重试次数
    max_retries: u8,
    status: Arc<RwLock<ProxyStatus>>,
    current_providers: Arc<RwLock<std::collections::HashMap<String, (String, String)>>>,
+    /// 故障转移切换管理器
+    failover_manager: Arc<FailoverSwitchManager>,
+    /// AppHandle，用于发射事件和更新托盘
+    app_handle: Option<tauri::AppHandle>,
+    /// 请求开始时的“当前供应商 ID”（用于判断是否需要同步 UI/托盘）
+    current_provider_id_at_start: String,
 }

 impl RequestForwarder {
    pub fn new(
-        db: Arc<Database>,
+        router: Arc<ProviderRouter>,
        timeout_secs: u64,
        max_retries: u8,
        status: Arc<RwLock<ProxyStatus>>,
        current_providers: Arc<RwLock<std::collections::HashMap<String, (String, String)>>>,
+        failover_manager: Arc<FailoverSwitchManager>,
+        app_handle: Option<tauri::AppHandle>,
+        current_provider_id_at_start: String,
    ) -> Self {
        let mut client_builder = Client::builder();
        if timeout_secs > 0 {
@@ -44,32 +55,89 @@ impl RequestForwarder {

        Self {
            client,
-            router: Arc::new(NewProviderRouter::new(db)),
+            router,
            max_retries,
            status,
            current_providers,
+            failover_manager,
+            app_handle,
+            current_provider_id_at_start,
        }
    }

+    /// 对单个 Provider 执行请求（带重试）
+    ///
+    /// 在同一个 Provider 上最多重试 max_retries 次，使用指数退避
+    async fn forward_with_provider_retry(
+        &self,
+        provider: &Provider,
+        endpoint: &str,
+        body: &Value,
+        headers: &axum::http::HeaderMap,
+        adapter: &dyn ProviderAdapter,
+    ) -> Result<Response, ProxyError> {
+        let mut last_error = None;
+
+        for attempt in 0..=self.max_retries {
+            if attempt > 0 {
+                // 指数退避：100ms, 200ms, 400ms, ...
+                let delay_ms = 100 * 2u64.pow(attempt as u32 - 1);
+                log::info!(
+                    "[{}] 重试第 {}/{} 次（等待 {}ms）",
+                    adapter.name(),
+                    attempt,
+                    self.max_retries,
+                    delay_ms
+                );
+                tokio::time::sleep(Duration::from_millis(delay_ms)).await;
+            }
+
+            match self
+                .forward(provider, endpoint, body, headers, adapter)
+                .await
+            {
+                Ok(response) => return Ok(response),
+                Err(e) => {
+                    // 只有“同一 Provider 内可重试”的错误才继续重试
+                    if !self.should_retry_same_provider(&e) {
+                        return Err(e);
+                    }
+
+                    log::debug!(
+                        "[{}] Provider {} 第 {} 次请求失败: {}",
+                        adapter.name(),
+                        provider.name,
+                        attempt + 1,
+                        e
+                    );
+                    last_error = Some(e);
+                }
+            }
+        }
+
+        Err(last_error.unwrap_or(ProxyError::MaxRetriesExceeded))
+    }
+
    /// 转发请求（带故障转移）
+    ///
+    /// # Arguments
+    /// * `app_type` - 应用类型
+    /// * `endpoint` - API 端点
+    /// * `body` - 请求体
+    /// * `headers` - 请求头
+    /// * `providers` - 已选择的 Provider 列表（由 RequestContext 提供，避免重复调用 select_providers）
    pub async fn forward_with_retry(
        &self,
        app_type: &AppType,
        endpoint: &str,
        body: Value,
        headers: axum::http::HeaderMap,
+        providers: Vec<Provider>,
    ) -> Result<Response, ProxyError> {
        // 获取适配器
        let adapter = get_adapter(app_type);
        let app_type_str = app_type.as_str();

-        // 使用新的 ProviderRouter 选择所有可用供应商
-        let providers = self
-            .router
-            .select_providers(app_type_str)
-            .await
-            .map_err(|e| ProxyError::DatabaseError(e.to_string()))?;
-
        if providers.is_empty() {
            return Err(ProxyError::NoAvailableProvider);
        }
@@ -81,14 +149,32 @@ impl RequestForwarder {
        );

        let mut last_error = None;
-        let mut failover_happened = false;
+        let mut attempted_providers = 0usize;

        // 依次尝试每个供应商
-        for (attempt, provider) in providers.iter().enumerate() {
+        for provider in providers.iter() {
+            // 发起请求前先获取熔断器放行许可（HalfOpen 会占用探测名额）
+            let permit = self
+                .router
+                .allow_provider_request(&provider.id, app_type_str)
+                .await;
+            if !permit.allowed {
+                log::debug!(
+                    "[{}] Provider {} 熔断器拒绝本次请求，跳过",
+                    app_type_str,
+                    provider.name
+                );
+                continue;
+            }
+
+            let used_half_open_permit = permit.used_half_open_permit;
+
+            attempted_providers += 1;
+
            log::info!(
                "[{}] 尝试 {}/{} - 使用Provider: {} (sort_index: {})",
                app_type_str,
-                attempt + 1,
+                attempted_providers,
                providers.len(),
                provider.name,
                provider.sort_index.unwrap_or(999999)
@@ -101,16 +187,13 @@ impl RequestForwarder {
                status.current_provider_id = Some(provider.id.clone());
                status.total_requests += 1;
                status.last_request_at = Some(chrono::Utc::now().to_rfc3339());
-                if attempt > 0 {
-                    failover_happened = true;
-                }
            }

            let start = Instant::now();

-            // 转发请求
+            // 转发请求（带单 Provider 内重试）
            match self
-                .forward(provider, endpoint, &body, &headers, adapter.as_ref())
+                .forward_with_provider_retry(provider, endpoint, &body, &headers, adapter.as_ref())
                .await
            {
                Ok(response) => {
@@ -119,7 +202,13 @@ impl RequestForwarder {
                    // 成功：记录成功并更新熔断器
                    if let Err(e) = self
                        .router
-                        .record_result(&provider.id, app_type_str, true, None)
+                        .record_result(
+                            &provider.id,
+                            app_type_str,
+                            used_half_open_permit,
+                            true,
+                            None,
+                        )
                        .await
                    {
                        log::warn!("Failed to record success: {e}");
@@ -139,14 +228,30 @@ impl RequestForwarder {
                        let mut status = self.status.write().await;
                        status.success_requests += 1;
                        status.last_error = None;
-                        if failover_happened {
+                        let should_switch =
+                            self.current_provider_id_at_start.as_str() != provider.id.as_str();
+                        if should_switch {
                            status.failover_count += 1;
                            log::info!(
-                                "[{}] 故障转移成功！切换到 Provider: {} (耗时: {}ms)",
+                                "[{}] 代理目标已切换到 Provider: {} (耗时: {}ms)",
                                app_type_str,
                                provider.name,
                                latency
                            );
+
+                            // 异步触发供应商切换，更新 UI/托盘，并把“当前供应商”同步为实际使用的 provider
+                            let fm = self.failover_manager.clone();
+                            let ah = self.app_handle.clone();
+                            let pid = provider.id.clone();
+                            let pname = provider.name.clone();
+                            let at = app_type_str.to_string();
+
+                            tokio::spawn(async move {
+                                if let Err(e) = fm.try_switch(ah.as_ref(), &at, &pid, &pname).await
+                                {
+                                    log::error!("[Failover] 切换供应商失败: {e}");
+                                }
+                            });
                        }
                        // 重新计算成功率
                        if status.total_requests > 0 {
@@ -171,7 +276,13 @@ impl RequestForwarder {
                    // 失败：记录失败并更新熔断器
                    if let Err(record_err) = self
                        .router
-                        .record_result(&provider.id, app_type_str, false, Some(e.to_string()))
+                        .record_result(
+                            &provider.id,
+                            app_type_str,
+                            used_half_open_permit,
+                            false,
+                            Some(e.to_string()),
+                        )
                        .await
                    {
                        log::warn!("Failed to record failure: {record_err}");
@@ -226,6 +337,20 @@ impl RequestForwarder {
            }
        }

+        if attempted_providers == 0 {
+            // providers 列表非空，但全部被熔断器拒绝（典型：HalfOpen 探测名额被占用）
+            {
+                let mut status = self.status.write().await;
+                status.failed_requests += 1;
+                status.last_error = Some("所有供应商暂时不可用（熔断器限制）".to_string());
+                if status.total_requests > 0 {
+                    status.success_rate =
+                        (status.success_requests as f32 / status.total_requests as f32) * 100.0;
+                }
+            }
+            return Err(ProxyError::NoAvailableProvider);
+        }
+
        // 所有供应商都失败了
        {
            let mut status = self.status.write().await;
@@ -373,21 +498,43 @@ impl RequestForwarder {
    }

    /// 分类ProxyError
+    ///
+    /// 决定哪些错误应该触发故障转移到下一个 Provider
+    ///
+    /// 设计原则：既然用户配置了多个供应商，就应该让所有供应商都尝试一遍。
+    /// 只有明确是客户端中断的情况才不重试。
+    fn should_retry_same_provider(&self, error: &ProxyError) -> bool {
+        match error {
+            // 网络类错误：短暂抖动时同一 Provider 内重试有意义
+            ProxyError::Timeout(_) => true,
+            ProxyError::ForwardFailed(_) => true,
+            // 上游 HTTP 错误：只对“可能瞬态”的状态码做同 Provider 重试（其余交给 failover）
+            ProxyError::UpstreamError { status, .. } => {
+                *status == 408 || *status == 429 || *status >= 500
+            }
+            _ => false,
+        }
+    }
+
    fn categorize_proxy_error(&self, error: &ProxyError) -> ErrorCategory {
        match error {
+            // 网络和上游错误：都应该尝试下一个供应商
            ProxyError::Timeout(_) => ErrorCategory::Retryable,
            ProxyError::ForwardFailed(_) => ErrorCategory::Retryable,
-            ProxyError::UpstreamError { status, .. } => {
-                if *status >= 500 {
-                    ErrorCategory::Retryable
-                } else if *status >= 400 && *status < 500 {
-                    ErrorCategory::NonRetryable
-                } else {
-                    ErrorCategory::Retryable
-                }
-            }
            ProxyError::ProviderUnhealthy(_) => ErrorCategory::Retryable,
+            // 上游 HTTP 错误：无论状态码如何，都尝试下一个供应商
+            // 原因：不同供应商有不同的限制和认证，一个供应商的 4xx 错误
+            // 不代表其他供应商也会失败
+            ProxyError::UpstreamError { .. } => ErrorCategory::Retryable,
+            // Provider 级配置/转换问题：换一个 Provider 可能就能成功
+            ProxyError::ConfigError(_) => ErrorCategory::Retryable,
+            ProxyError::TransformError(_) => ErrorCategory::Retryable,
+            ProxyError::AuthError(_) => ErrorCategory::Retryable,
+            ProxyError::StreamIdleTimeout(_) => ErrorCategory::Retryable,
+            ProxyError::MaxRetriesExceeded => ErrorCategory::Retryable,
+            // 无可用供应商：所有供应商都试过了，无法重试
            ProxyError::NoAvailableProvider => ErrorCategory::NonRetryable,
+            // 其他错误（数据库/内部错误等）：不是换供应商能解决的问题
            _ => ErrorCategory::NonRetryable,
        }
    }
@@ -0,0 +1,164 @@
+//! Handler 配置模块
+//!
+//! 定义各 API 处理器的配置结构和使用量解析器
+
+use crate::app_config::AppType;
+use crate::proxy::usage::parser::TokenUsage;
+use serde_json::Value;
+
+/// 使用量解析器类型别名
+pub type StreamUsageParser = fn(&[Value]) -> Option<TokenUsage>;
+pub type ResponseUsageParser = fn(&Value) -> Option<TokenUsage>;
+
+/// 模型提取器类型别名
+/// 参数: (流式事件列表, 请求中的模型名称) -> 最终使用的模型名称
+pub type StreamModelExtractor = fn(&[Value], &str) -> String;
+
+/// 各 API 的使用量解析配置
+#[derive(Clone, Copy)]
+pub struct UsageParserConfig {
+    /// 流式响应解析器
+    pub stream_parser: StreamUsageParser,
+    /// 非流式响应解析器
+    pub response_parser: ResponseUsageParser,
+    /// 流式响应中的模型提取器
+    pub model_extractor: StreamModelExtractor,
+    /// 应用类型字符串（用于日志记录）
+    pub app_type_str: &'static str,
+}
+
+// ============================================================================
+// 模型提取器实现
+// ============================================================================
+
+/// Claude 流式响应模型提取（直接使用请求模型）
+fn claude_model_extractor(_events: &[Value], request_model: &str) -> String {
+    request_model.to_string()
+}
+
+/// OpenAI Chat Completions 流式响应模型提取
+fn openai_model_extractor(events: &[Value], request_model: &str) -> String {
+    events
+        .iter()
+        .find_map(|e| e.get("model")?.as_str())
+        .unwrap_or(request_model)
+        .to_string()
+}
+
+/// Codex Responses API 流式响应模型提取
+fn codex_model_extractor(events: &[Value], request_model: &str) -> String {
+    events
+        .iter()
+        .find_map(|e| {
+            if e.get("type")?.as_str()? == "response.completed" {
+                e.get("response")?.get("model")?.as_str()
+            } else {
+                None
+            }
+        })
+        .unwrap_or(request_model)
+        .to_string()
+}
+
+/// Gemini 流式响应模型提取（优先使用 usage.model）
+fn gemini_model_extractor(events: &[Value], request_model: &str) -> String {
+    // 首先尝试从解析的 usage 中获取模型
+    if let Some(usage) = TokenUsage::from_gemini_stream_chunks(events) {
+        if let Some(model) = usage.model {
+            return model;
+        }
+    }
+    request_model.to_string()
+}
+
+// ============================================================================
+// 预定义配置
+// ============================================================================
+
+/// Claude API 解析配置
+pub const CLAUDE_PARSER_CONFIG: UsageParserConfig = UsageParserConfig {
+    stream_parser: TokenUsage::from_claude_stream_events,
+    response_parser: TokenUsage::from_claude_response,
+    model_extractor: claude_model_extractor,
+    app_type_str: "claude",
+};
+
+/// OpenAI Chat Completions API 解析配置（用于 Codex /v1/chat/completions）
+pub const OPENAI_PARSER_CONFIG: UsageParserConfig = UsageParserConfig {
+    stream_parser: TokenUsage::from_openai_stream_events,
+    response_parser: TokenUsage::from_openai_response,
+    model_extractor: openai_model_extractor,
+    app_type_str: "codex",
+};
+
+/// Codex Responses API 解析配置（用于 /v1/responses）
+pub const CODEX_PARSER_CONFIG: UsageParserConfig = UsageParserConfig {
+    stream_parser: TokenUsage::from_codex_stream_events,
+    response_parser: TokenUsage::from_codex_response,
+    model_extractor: codex_model_extractor,
+    app_type_str: "codex",
+};
+
+/// Gemini API 解析配置
+pub const GEMINI_PARSER_CONFIG: UsageParserConfig = UsageParserConfig {
+    stream_parser: TokenUsage::from_gemini_stream_chunks,
+    response_parser: TokenUsage::from_gemini_response,
+    model_extractor: gemini_model_extractor,
+    app_type_str: "gemini",
+};
+
+// ============================================================================
+// Handler 配置（预留，用于进一步简化）
+// ============================================================================
+
+/// Handler 基础配置
+///
+/// 预留结构，可用于进一步统一各 handler 的配置
+#[allow(dead_code)]
+#[derive(Clone)]
+pub struct HandlerConfig {
+    /// 应用类型
+    pub app_type: AppType,
+    /// 日志标签
+    pub tag: &'static str,
+    /// 应用类型字符串
+    pub app_type_str: &'static str,
+    /// 使用量解析配置
+    pub parser_config: &'static UsageParserConfig,
+}
+
+/// Claude Handler 配置
+#[allow(dead_code)]
+pub const CLAUDE_HANDLER_CONFIG: HandlerConfig = HandlerConfig {
+    app_type: AppType::Claude,
+    tag: "Claude",
+    app_type_str: "claude",
+    parser_config: &CLAUDE_PARSER_CONFIG,
+};
+
+/// Codex Chat Completions Handler 配置
+#[allow(dead_code)]
+pub const CODEX_CHAT_HANDLER_CONFIG: HandlerConfig = HandlerConfig {
+    app_type: AppType::Codex,
+    tag: "Codex",
+    app_type_str: "codex",
+    parser_config: &OPENAI_PARSER_CONFIG,
+};
+
+/// Codex Responses Handler 配置
+#[allow(dead_code)]
+pub const CODEX_RESPONSES_HANDLER_CONFIG: HandlerConfig = HandlerConfig {
+    app_type: AppType::Codex,
+    tag: "Codex",
+    app_type_str: "codex",
+    parser_config: &CODEX_PARSER_CONFIG,
+};
+
+/// Gemini Handler 配置
+#[allow(dead_code)]
+pub const GEMINI_HANDLER_CONFIG: HandlerConfig = HandlerConfig {
+    app_type: AppType::Gemini,
+    tag: "Gemini",
+    app_type_str: "gemini",
+    parser_config: &GEMINI_PARSER_CONFIG,
+};
@@ -0,0 +1,160 @@
+//! 请求上下文模块
+//!
+//! 提供请求生命周期的上下文管理，封装通用初始化逻辑
+
+use crate::app_config::AppType;
+use crate::provider::Provider;
+use crate::proxy::{
+    forwarder::RequestForwarder, server::ProxyState, types::ProxyConfig, ProxyError,
+};
+use std::time::Instant;
+
+/// 请求上下文
+///
+/// 贯穿整个请求生命周期，包含：
+/// - 计时信息
+/// - 代理配置
+/// - 选中的 Provider 列表（用于故障转移）
+/// - 请求模型名称
+/// - 日志标签
+pub struct RequestContext {
+    /// 请求开始时间
+    pub start_time: Instant,
+    /// 代理配置快照
+    pub config: ProxyConfig,
+    /// 选中的 Provider（故障转移链的第一个）
+    pub provider: Provider,
+    /// 完整的 Provider 列表（用于故障转移）
+    providers: Vec<Provider>,
+    /// 请求开始时的“当前供应商”（用于判断是否需要同步 UI/托盘）
+    ///
+    /// 这里使用本地 settings 的设备级 current provider。
+    /// 代理模式下如果实际使用的 provider 与此不一致，会触发切换以确保 UI 始终准确。
+    pub current_provider_id: String,
+    /// 请求中的模型名称
+    pub request_model: String,
+    /// 日志标签（如 "Claude"、"Codex"、"Gemini"）
+    pub tag: &'static str,
+    /// 应用类型字符串（如 "claude"、"codex"、"gemini"）
+    pub app_type_str: &'static str,
+    /// 应用类型（预留，目前通过 app_type_str 使用）
+    #[allow(dead_code)]
+    pub app_type: AppType,
+}
+
+impl RequestContext {
+    /// 创建请求上下文
+    ///
+    /// # Arguments
+    /// * `state` - 代理服务器状态
+    /// * `body` - 请求体 JSON
+    /// * `app_type` - 应用类型
+    /// * `tag` - 日志标签
+    /// * `app_type_str` - 应用类型字符串
+    ///
+    /// # Errors
+    /// 返回 `ProxyError` 如果 Provider 选择失败
+    pub async fn new(
+        state: &ProxyState,
+        body: &serde_json::Value,
+        app_type: AppType,
+        tag: &'static str,
+        app_type_str: &'static str,
+    ) -> Result<Self, ProxyError> {
+        let start_time = Instant::now();
+        let config = state.config.read().await.clone();
+        let current_provider_id =
+            crate::settings::get_current_provider(&app_type).unwrap_or_default();
+
+        // 从请求体提取模型名称
+        let request_model = body
+            .get("model")
+            .and_then(|m| m.as_str())
+            .unwrap_or("unknown")
+            .to_string();
+
+        // 使用共享的 ProviderRouter 选择 Provider（熔断器状态跨请求保持）
+        // 注意：只在这里调用一次，结果传递给 forwarder，避免重复消耗 HalfOpen 名额
+        let providers = state
+            .provider_router
+            .select_providers(app_type_str)
+            .await
+            .map_err(|e| ProxyError::DatabaseError(e.to_string()))?;
+
+        let provider = providers
+            .first()
+            .cloned()
+            .ok_or(ProxyError::NoAvailableProvider)?;
+
+        log::info!(
+            "[{}] Provider: {}, model: {}, failover chain: {} providers",
+            tag,
+            provider.name,
+            request_model,
+            providers.len()
+        );
+
+        Ok(Self {
+            start_time,
+            config,
+            provider,
+            providers,
+            current_provider_id,
+            request_model,
+            tag,
+            app_type_str,
+            app_type,
+        })
+    }
+
+    /// 从 URI 提取模型名称（Gemini 专用）
+    ///
+    /// Gemini API 的模型名称在 URI 中，格式如：
+    /// `/v1beta/models/gemini-pro:generateContent`
+    pub fn with_model_from_uri(mut self, uri: &axum::http::Uri) -> Self {
+        let endpoint = uri
+            .path_and_query()
+            .map(|pq| pq.as_str())
+            .unwrap_or(uri.path());
+
+        self.request_model = endpoint
+            .split('/')
+            .find(|s| s.starts_with("models/"))
+            .and_then(|s| s.strip_prefix("models/"))
+            .map(|s| s.split(':').next().unwrap_or(s))
+            .unwrap_or("unknown")
+            .to_string();
+
+        log::info!("[{}] 从 URI 提取模型: {}", self.tag, self.request_model);
+        self
+    }
+
+    /// 创建 RequestForwarder
+    ///
+    /// 使用共享的 ProviderRouter，确保熔断器状态跨请求保持
+    pub fn create_forwarder(&self, state: &ProxyState) -> RequestForwarder {
+        RequestForwarder::new(
+            state.provider_router.clone(),
+            self.config.request_timeout,
+            self.config.max_retries,
+            state.status.clone(),
+            state.current_providers.clone(),
+            state.failover_manager.clone(),
+            state.app_handle.clone(),
+            self.current_provider_id.clone(),
+        )
+    }
+
+    /// 获取 Provider 列表（用于故障转移）
+    ///
+    /// 返回在创建上下文时已选择的 providers，避免重复调用 select_providers()
+    pub fn get_providers(&self) -> Vec<Provider> {
+        self.providers.clone()
+    }
+
+    /// 计算请求延迟（毫秒）
+    #[inline]
+    pub fn latency_ms(&self) -> u64 {
+        self.start_time.elapsed().as_millis() as u64
+    }
+}
@@ -4,13 +4,17 @@

 pub mod circuit_breaker;
 pub mod error;
+pub mod error_mapper;
+pub(crate) mod failover_switch;
 mod forwarder;
+pub mod handler_config;
+pub mod handler_context;
 mod handlers;
 mod health;
 pub mod provider_router;
 pub mod providers;
 pub mod response_handler;
-mod router;
+pub mod response_processor;
 pub(crate) mod server;
 pub mod session;
 pub(crate) mod types;
@@ -5,7 +5,7 @@
 use crate::database::Database;
 use crate::error::AppError;
 use crate::provider::Provider;
-use crate::proxy::circuit_breaker::CircuitBreaker;
+use crate::proxy::circuit_breaker::{AllowResult, CircuitBreaker, CircuitBreakerConfig};
 use std::collections::HashMap;
 use std::sync::Arc;
 use tokio::sync::RwLock;
@@ -28,60 +28,105 @@ impl ProviderRouter {
    }

    /// 选择可用的供应商（支持故障转移）
-    /// 返回按优先级排序的可用供应商列表
+    ///
+    /// 返回按优先级排序的可用供应商列表：
+    /// 1. 当前供应商（is_current=true）始终第一位
+    /// 2. 故障转移队列中的其他供应商（按 queue_order 排序）
+    /// 3. 只返回熔断器未打开的供应商
    pub async fn select_providers(&self, app_type: &str) -> Result<Vec<Provider>, AppError> {
-        // 1. 获取所有启用代理的供应商
-        let providers = self.db.get_proxy_targets(app_type).await?;
+        let mut result = Vec::new();
+        let all_providers = self.db.get_all_providers(app_type)?;

-        if providers.is_empty() {
-            return Err(AppError::Config(
-                "No proxy target providers configured".to_string(),
-            ));
-        }
+        // 1. 当前供应商始终第一位
+        if let Some(current_id) = self.db.get_current_provider(app_type)? {
+            if let Some(current) = all_providers.get(&current_id) {
+                let circuit_key = format!("{}:{}", app_type, current.id);
+                let breaker = self.get_or_create_circuit_breaker(&circuit_key).await;

-        log::debug!(
-            "Found {} proxy target providers for app_type: {}",
-            providers.len(),
-            app_type
-        );
-
-        // 2. 按 sort_index 排序（已经在数据库查询中排序了）
-        let sorted_providers: Vec<_> = providers.into_values().collect();
-
-        // 3. 过滤可用的供应商（检查熔断器状态）
-        let mut available_providers = Vec::new();
-
-        for provider in sorted_providers {
-            let circuit_key = format!("{}:{}", app_type, provider.id);
-            let breaker = self.get_or_create_circuit_breaker(&circuit_key).await;
-
-            if breaker.allow_request().await {
-                log::debug!(
-                    "Provider {} is available (circuit state: {:?})",
-                    provider.id,
-                    breaker.get_state().await
-                );
-                available_providers.push(provider);
-            } else {
-                log::warn!(
-                    "Provider {} is unavailable (circuit breaker open)",
-                    provider.id
-                );
+                if breaker.is_available().await {
+                    log::info!(
+                        "[{}] Current provider available: {} ({})",
+                        app_type,
+                        current.name,
+                        current.id
+                    );
+                    result.push(current.clone());
+                } else {
+                    log::warn!(
+                        "[{}] Current provider {} circuit breaker open, checking failover queue",
+                        app_type,
+                        current.name
+                    );
+                }
            }
        }

-        if available_providers.is_empty() {
-            return Err(AppError::Config(
-                "All proxy target providers are unavailable (circuit breakers open)".to_string(),
-            ));
+        // 2. 获取故障转移队列中的供应商
+        let queue = self.db.get_failover_queue(app_type)?;
+
+        for item in queue {
+            // 跳过已添加的当前供应商
+            if result.iter().any(|p| p.id == item.provider_id) {
+                continue;
+            }
+
+            // 跳过禁用的队列项
+            if !item.enabled {
+                continue;
+            }
+
+            // 获取供应商信息
+            if let Some(provider) = all_providers.get(&item.provider_id) {
+                // 检查熔断器状态
+                let circuit_key = format!("{}:{}", app_type, provider.id);
+                let breaker = self.get_or_create_circuit_breaker(&circuit_key).await;
+
+                if breaker.is_available().await {
+                    log::info!(
+                        "[{}] Failover provider available: {} ({}) at queue position {}",
+                        app_type,
+                        provider.name,
+                        provider.id,
+                        item.queue_order
+                    );
+                    result.push(provider.clone());
+                } else {
+                    log::debug!(
+                        "[{}] Failover provider {} circuit breaker open, skipping",
+                        app_type,
+                        provider.name
+                    );
+                }
+            }
+        }
+
+        if result.is_empty() {
+            return Err(AppError::Config(format!(
+                "No available provider for {app_type} (all circuit breakers open or no providers configured)"
+            )));
        }

        log::info!(
-            "Selected {} available providers for failover chain",
-            available_providers.len()
+            "[{}] Failover chain: {} provider(s) available",
+            app_type,
+            result.len()
        );

-        Ok(available_providers)
+        Ok(result)
+    }
+
+    /// 请求执行前获取熔断器“放行许可”
+    ///
+    /// - Closed：直接放行
+    /// - Open：超时到达后切到 HalfOpen 并放行一次探测
+    /// - HalfOpen：按限流规则放行探测
+    ///
+    /// 注意：调用方必须在请求结束后通过 `record_result()` 释放 HalfOpen 名额，
+    /// 否则会导致该 Provider 长时间无法进入探测状态。
+    pub async fn allow_provider_request(&self, provider_id: &str, app_type: &str) -> AllowResult {
+        let circuit_key = format!("{app_type}:{provider_id}");
+        let breaker = self.get_or_create_circuit_breaker(&circuit_key).await;
+        breaker.allow_request().await
    }

    /// 记录供应商请求结果
@@ -89,18 +134,23 @@ impl ProviderRouter {
        &self,
        provider_id: &str,
        app_type: &str,
+        used_half_open_permit: bool,
        success: bool,
        error_msg: Option<String>,
    ) -> Result<(), AppError> {
-        // 1. 更新熔断器状态
+        // 1. 获取熔断器配置（用于更新健康状态和判断是否禁用）
+        let config = self.db.get_circuit_breaker_config().await.ok();
+        let failure_threshold = config.map(|c| c.failure_threshold).unwrap_or(5);
+
+        // 2. 更新熔断器状态
        let circuit_key = format!("{app_type}:{provider_id}");
        let breaker = self.get_or_create_circuit_breaker(&circuit_key).await;

        if success {
-            breaker.record_success().await;
+            breaker.record_success(used_half_open_permit).await;
            log::debug!("Provider {provider_id} request succeeded");
        } else {
-            breaker.record_failure().await;
+            breaker.record_failure(used_half_open_permit).await;
            log::warn!(
                "Provider {} request failed: {}",
                provider_id,
@@ -108,38 +158,21 @@ impl ProviderRouter {
            );
        }

-        // 2. 更新数据库健康状态
+        // 3. 更新数据库健康状态（使用配置的阈值）
        self.db
-            .update_provider_health(provider_id, app_type, success, error_msg.clone())
+            .update_provider_health_with_threshold(
+                provider_id,
+                app_type,
+                success,
+                error_msg.clone(),
+                failure_threshold,
+            )
            .await?;

-        // 3. 如果连续失败达到熔断阈值，自动禁用代理目标
-        if !success {
-            let health = self.db.get_provider_health(provider_id, app_type).await?;
-
-            // 获取熔断器配置
-            let config = self.db.get_circuit_breaker_config().await.ok();
-            let failure_threshold = config.map(|c| c.failure_threshold).unwrap_or(5);
-
-            // 如果连续失败达到阈值，自动关闭该供应商的代理开关
-            if health.consecutive_failures >= failure_threshold {
-                log::warn!(
-                    "Provider {} has failed {} times (threshold: {}), auto-disabling proxy target",
-                    provider_id,
-                    health.consecutive_failures,
-                    failure_threshold
-                );
-                self.db
-                    .set_proxy_target(provider_id, app_type, false)
-                    .await?;
-            }
-        }
-
        Ok(())
    }

    /// 重置熔断器（手动恢复）
-    #[allow(dead_code)]
    pub async fn reset_circuit_breaker(&self, circuit_key: &str) {
        let breakers = self.circuit_breakers.read().await;
        if let Some(breaker) = breakers.get(circuit_key) {
@@ -148,6 +181,27 @@ impl ProviderRouter {
        }
    }

+    /// 重置指定供应商的熔断器
+    pub async fn reset_provider_breaker(&self, provider_id: &str, app_type: &str) {
+        let circuit_key = format!("{app_type}:{provider_id}");
+        self.reset_circuit_breaker(&circuit_key).await;
+    }
+
+    /// 更新所有熔断器的配置（热更新）
+    ///
+    /// 当用户在 UI 中修改熔断器配置后调用此方法，
+    /// 所有现有的熔断器会立即使用新配置
+    pub async fn update_all_configs(&self, config: CircuitBreakerConfig) {
+        let breakers = self.circuit_breakers.read().await;
+        let count = breakers.len();
+
+        for breaker in breakers.values() {
+            breaker.update_config(config.clone()).await;
+        }
+
+        log::info!("已更新 {count} 个熔断器的配置");
+    }
+
    /// 获取熔断器状态
    #[allow(dead_code)]
    pub async fn get_circuit_breaker_stats(
@@ -203,6 +257,7 @@ impl ProviderRouter {
 mod tests {
    use super::*;
    use crate::database::Database;
+    use serde_json::json;

    #[tokio::test]
    async fn test_provider_router_creation() {
@@ -211,6 +266,46 @@ mod tests {

        // 测试创建熔断器
        let breaker = router.get_or_create_circuit_breaker("claude:test").await;
-        assert!(breaker.allow_request().await);
+        assert!(breaker.allow_request().await.allowed);
+    }
+
+    #[tokio::test]
+    async fn select_providers_does_not_consume_half_open_permit() {
+        let db = Arc::new(Database::memory().unwrap());
+
+        // 配置：让熔断器 Open 后立刻进入 HalfOpen（timeout_seconds=0），并用 1 次失败就打开熔断器
+        db.update_circuit_breaker_config(&CircuitBreakerConfig {
+            failure_threshold: 1,
+            timeout_seconds: 0,
+            ..Default::default()
+        })
+        .await
+        .unwrap();
+
+        // 准备 2 个 Provider：A（当前）+ B（队列）
+        let provider_a =
+            Provider::with_id("a".to_string(), "Provider A".to_string(), json!({}), None);
+        let provider_b =
+            Provider::with_id("b".to_string(), "Provider B".to_string(), json!({}), None);
+
+        db.save_provider("claude", &provider_a).unwrap();
+        db.save_provider("claude", &provider_b).unwrap();
+        db.set_current_provider("claude", "a").unwrap();
+        db.add_to_failover_queue("claude", "b").unwrap();
+
+        let router = ProviderRouter::new(db.clone());
+
+        // 让 B 进入 Open 状态（failure_threshold=1）
+        router
+            .record_result("b", "claude", false, false, Some("fail".to_string()))
+            .await
+            .unwrap();
+
+        // select_providers 只做“可用性判断”，不应占用 HalfOpen 探测名额
+        let providers = router.select_providers("claude").await.unwrap();
+        assert_eq!(providers.len(), 2);
+
+        // 如果 select_providers 错误地消耗了 HalfOpen 名额，这里会返回 false（被限流拒绝）
+        assert!(router.allow_provider_request("b", "claude").await.allowed);
    }
 }
@@ -253,7 +253,6 @@ mod tests {
            meta: None,
            icon: None,
            icon_color: None,
-            is_proxy_target: None,
        }
    }

@@ -174,7 +174,6 @@ mod tests {
            meta: None,
            icon: None,
            icon_color: None,
-            is_proxy_target: None,
        }
    }

@@ -120,11 +120,7 @@ impl GeminiAdapter {
    /// 从 Provider 配置中提取原始 API Key
    fn extract_key_raw(&self, provider: &Provider) -> Option<String> {
        if let Some(env) = provider.settings_config.get("env") {
-            // 优先使用 GOOGLE_GEMINI_API_KEY
-            if let Some(key) = env.get("GOOGLE_GEMINI_API_KEY").and_then(|v| v.as_str()) {
-                return Some(key.to_string());
-            }
-            // 备选 GEMINI_API_KEY
+            // 使用 GEMINI_API_KEY
            if let Some(key) = env.get("GEMINI_API_KEY").and_then(|v| v.as_str()) {
                return Some(key.to_string());
            }
@@ -254,7 +250,6 @@ mod tests {
            meta: None,
            icon: None,
            icon_color: None,
-            is_proxy_target: None,
        }
    }

@@ -276,7 +271,7 @@ mod tests {
        let adapter = GeminiAdapter::new();
        let provider = create_provider(json!({
            "env": {
-                "GOOGLE_GEMINI_API_KEY": "AIza-test-key-12345678"
+                "GEMINI_API_KEY": "AIza-test-key-12345678"
            }
        }));

@@ -291,7 +286,7 @@ mod tests {
        let adapter = GeminiAdapter::new();
        let provider = create_provider(json!({
            "env": {
-                "GOOGLE_GEMINI_API_KEY": "ya29.test-access-token-12345"
+                "GEMINI_API_KEY": "ya29.test-access-token-12345"
            }
        }));

@@ -308,7 +303,7 @@ mod tests {
        let adapter = GeminiAdapter::new();
        let provider = create_provider(json!({
            "env": {
-                "GOOGLE_GEMINI_API_KEY": "{\"access_token\":\"ya29.test-token\",\"refresh_token\":\"1//refresh\"}"
+                "GEMINI_API_KEY": "{\"access_token\":\"ya29.test-token\",\"refresh_token\":\"1//refresh\"}"
            }
        }));

@@ -324,7 +319,7 @@ mod tests {
        // API Key
        let api_key_provider = create_provider(json!({
            "env": {
-                "GOOGLE_GEMINI_API_KEY": "AIza-test-key"
+                "GEMINI_API_KEY": "AIza-test-key"
            }
        }));
        assert_eq!(
@@ -335,7 +330,7 @@ mod tests {
        // OAuth access_token
        let oauth_provider = create_provider(json!({
            "env": {
-                "GOOGLE_GEMINI_API_KEY": "ya29.test-token"
+                "GEMINI_API_KEY": "ya29.test-token"
            }
        }));
        assert_eq!(
@@ -346,7 +341,7 @@ mod tests {
        // OAuth JSON
        let oauth_json_provider = create_provider(json!({
            "env": {
-                "GOOGLE_GEMINI_API_KEY": "{\"access_token\":\"ya29.test\"}"
+                "GEMINI_API_KEY": "{\"access_token\":\"ya29.test\"}"
            }
        }));
        assert_eq!(
@@ -205,7 +205,6 @@ mod tests {
            meta: None,
            icon: None,
            icon_color: None,
-            is_proxy_target: None,
        }
    }

@@ -369,7 +368,7 @@ mod tests {
    fn test_from_app_type_gemini_api_key() {
        let provider = create_provider(json!({
            "env": {
-                "GOOGLE_GEMINI_API_KEY": "AIza-test-key"
+                "GEMINI_API_KEY": "AIza-test-key"
            }
        }));

@@ -381,7 +380,7 @@ mod tests {
    fn test_from_app_type_gemini_cli_oauth() {
        let provider = create_provider(json!({
            "env": {
-                "GOOGLE_GEMINI_API_KEY": "ya29.test-access-token"
+                "GEMINI_API_KEY": "ya29.test-access-token"
            }
        }));

@@ -393,7 +392,7 @@ mod tests {
    fn test_from_app_type_gemini_cli_json() {
        let provider = create_provider(json!({
            "env": {
-                "GOOGLE_GEMINI_API_KEY": "{\"access_token\":\"ya29.test\",\"refresh_token\":\"1//test\"}"
+                "GEMINI_API_KEY": "{\"access_token\":\"ya29.test\",\"refresh_token\":\"1//test\"}"
            }
        }));

@@ -394,7 +394,6 @@ mod tests {
            meta: None,
            icon: None,
            icon_color: None,
-            is_proxy_target: None,
        }
    }

@@ -0,0 +1,411 @@
+//! 响应处理器模块
+//!
+//! 统一处理流式和非流式 API 响应
+
+use super::{
+    handler_config::UsageParserConfig, handler_context::RequestContext, server::ProxyState,
+    usage::parser::TokenUsage, ProxyError,
+};
+use axum::response::Response;
+use bytes::Bytes;
+use futures::stream::{Stream, StreamExt};
+use rust_decimal::Decimal;
+use serde_json::Value;
+use std::{
+    str::FromStr,
+    sync::{
+        atomic::{AtomicBool, Ordering},
+        Arc,
+    },
+};
+use tokio::sync::Mutex;
+
+// ============================================================================
+// 公共接口
+// ============================================================================
+
+/// 检测响应是否为 SSE 流式响应
+#[inline]
+pub fn is_sse_response(response: &reqwest::Response) -> bool {
+    response
+        .headers()
+        .get("content-type")
+        .and_then(|v| v.to_str().ok())
+        .map(|ct| ct.contains("text/event-stream"))
+        .unwrap_or(false)
+}
+
+/// 处理流式响应
+pub async fn handle_streaming(
+    response: reqwest::Response,
+    ctx: &RequestContext,
+    state: &ProxyState,
+    parser_config: &UsageParserConfig,
+) -> Response {
+    log::info!("[{}] 流式透传响应 (SSE)", ctx.tag);
+
+    let status = response.status();
+    let mut builder = axum::response::Response::builder().status(status);
+
+    // 复制响应头
+    for (key, value) in response.headers() {
+        builder = builder.header(key, value);
+    }
+
+    // 创建字节流
+    let stream = response
+        .bytes_stream()
+        .map(|chunk| chunk.map_err(|e| std::io::Error::other(e.to_string())));
+
+    // 创建使用量收集器
+    let usage_collector = create_usage_collector(ctx, state, status.as_u16(), parser_config);
+
+    // 创建带日志的透传流
+    let logged_stream = create_logged_passthrough_stream(stream, ctx.tag, Some(usage_collector));
+
+    let body = axum::body::Body::from_stream(logged_stream);
+    builder.body(body).unwrap()
+}
+
+/// 处理非流式响应
+pub async fn handle_non_streaming(
+    response: reqwest::Response,
+    ctx: &RequestContext,
+    state: &ProxyState,
+    parser_config: &UsageParserConfig,
+) -> Result<Response, ProxyError> {
+    let response_headers = response.headers().clone();
+    let status = response.status();
+
+    // 读取响应体
+    let body_bytes = response.bytes().await.map_err(|e| {
+        log::error!("[{}] 读取响应失败: {e}", ctx.tag);
+        ProxyError::ForwardFailed(format!("Failed to read response body: {e}"))
+    })?;
+
+    // 解析并记录使用量
+    if let Ok(json_value) = serde_json::from_slice::<Value>(&body_bytes) {
+        log::info!(
+            "[{}] <<< 响应 JSON:\n{}",
+            ctx.tag,
+            serde_json::to_string_pretty(&json_value).unwrap_or_default()
+        );
+
+        // 解析使用量
+        if let Some(usage) = (parser_config.response_parser)(&json_value) {
+            let model = json_value
+                .get("model")
+                .and_then(|m| m.as_str())
+                .unwrap_or(&ctx.request_model);
+
+            spawn_log_usage(state, ctx, usage, model, status.as_u16(), false);
+        } else {
+            log::debug!(
+                "[{}] 未能解析 usage 信息，跳过记录",
+                parser_config.app_type_str
+            );
+        }
+    } else {
+        log::info!(
+            "[{}] <<< 响应 (非 JSON): {} bytes",
+            ctx.tag,
+            body_bytes.len()
+        );
+    }
+
+    log::info!("[{}] ====== 请求结束 ======", ctx.tag);
+
+    // 构建响应
+    let mut builder = axum::response::Response::builder().status(status);
+    for (key, value) in response_headers.iter() {
+        builder = builder.header(key, value);
+    }
+
+    let body = axum::body::Body::from(body_bytes);
+    Ok(builder.body(body).unwrap())
+}
+
+/// 通用响应处理入口
+///
+/// 根据响应类型自动选择流式或非流式处理
+pub async fn process_response(
+    response: reqwest::Response,
+    ctx: &RequestContext,
+    state: &ProxyState,
+    parser_config: &UsageParserConfig,
+) -> Result<Response, ProxyError> {
+    if is_sse_response(&response) {
+        Ok(handle_streaming(response, ctx, state, parser_config).await)
+    } else {
+        handle_non_streaming(response, ctx, state, parser_config).await
+    }
+}
+
+// ============================================================================
+// SSE 使用量收集器
+// ============================================================================
+
+type UsageCallbackWithTiming = Arc<dyn Fn(Vec<Value>, Option<u64>) + Send + Sync + 'static>;
+
+/// SSE 使用量收集器
+#[derive(Clone)]
+pub struct SseUsageCollector {
+    inner: Arc<SseUsageCollectorInner>,
+}
+
+struct SseUsageCollectorInner {
+    events: Mutex<Vec<Value>>,
+    first_event_time: Mutex<Option<std::time::Instant>>,
+    start_time: std::time::Instant,
+    on_complete: UsageCallbackWithTiming,
+    finished: AtomicBool,
+}
+
+impl SseUsageCollector {
+    /// 创建新的使用量收集器
+    pub fn new(
+        start_time: std::time::Instant,
+        callback: impl Fn(Vec<Value>, Option<u64>) + Send + Sync + 'static,
+    ) -> Self {
+        let on_complete: UsageCallbackWithTiming = Arc::new(callback);
+        Self {
+            inner: Arc::new(SseUsageCollectorInner {
+                events: Mutex::new(Vec::new()),
+                first_event_time: Mutex::new(None),
+                start_time,
+                on_complete,
+                finished: AtomicBool::new(false),
+            }),
+        }
+    }
+
+    /// 推送 SSE 事件
+    pub async fn push(&self, event: Value) {
+        // 记录首个事件时间
+        {
+            let mut first_time = self.inner.first_event_time.lock().await;
+            if first_time.is_none() {
+                *first_time = Some(std::time::Instant::now());
+            }
+        }
+        let mut events = self.inner.events.lock().await;
+        events.push(event);
+    }
+
+    /// 完成收集并触发回调
+    pub async fn finish(&self) {
+        if self.inner.finished.swap(true, Ordering::SeqCst) {
+            return;
+        }
+
+        let events = {
+            let mut guard = self.inner.events.lock().await;
+            std::mem::take(&mut *guard)
+        };
+
+        let first_token_ms = {
+            let first_time = self.inner.first_event_time.lock().await;
+            first_time.map(|t| (t - self.inner.start_time).as_millis() as u64)
+        };
+
+        (self.inner.on_complete)(events, first_token_ms);
+    }
+}
+
+// ============================================================================
+// 内部辅助函数
+// ============================================================================
+
+/// 创建使用量收集器
+fn create_usage_collector(
+    ctx: &RequestContext,
+    state: &ProxyState,
+    status_code: u16,
+    parser_config: &UsageParserConfig,
+) -> SseUsageCollector {
+    let state = state.clone();
+    let provider_id = ctx.provider.id.clone();
+    let request_model = ctx.request_model.clone();
+    let app_type_str = parser_config.app_type_str;
+    let tag = ctx.tag;
+    let start_time = ctx.start_time;
+    let stream_parser = parser_config.stream_parser;
+    let model_extractor = parser_config.model_extractor;
+
+    SseUsageCollector::new(start_time, move |events, first_token_ms| {
+        if let Some(usage) = stream_parser(&events) {
+            let model = model_extractor(&events, &request_model);
+            let latency_ms = start_time.elapsed().as_millis() as u64;
+
+            let state = state.clone();
+            let provider_id = provider_id.clone();
+
+            tokio::spawn(async move {
+                log_usage_internal(
+                    &state,
+                    &provider_id,
+                    app_type_str,
+                    &model,
+                    usage,
+                    latency_ms,
+                    first_token_ms,
+                    true, // is_streaming
+                    status_code,
+                )
+                .await;
+            });
+        } else {
+            log::debug!("[{tag}] 流式响应缺少 usage 统计，跳过消费记录");
+        }
+    })
+}
+
+/// 异步记录使用量
+fn spawn_log_usage(
+    state: &ProxyState,
+    ctx: &RequestContext,
+    usage: TokenUsage,
+    model: &str,
+    status_code: u16,
+    is_streaming: bool,
+) {
+    let state = state.clone();
+    let provider_id = ctx.provider.id.clone();
+    let app_type_str = ctx.app_type_str.to_string();
+    let model = model.to_string();
+    let latency_ms = ctx.latency_ms();
+
+    tokio::spawn(async move {
+        log_usage_internal(
+            &state,
+            &provider_id,
+            &app_type_str,
+            &model,
+            usage,
+            latency_ms,
+            None,
+            is_streaming,
+            status_code,
+        )
+        .await;
+    });
+}
+
+/// 内部使用量记录函数
+#[allow(clippy::too_many_arguments)]
+async fn log_usage_internal(
+    state: &ProxyState,
+    provider_id: &str,
+    app_type: &str,
+    model: &str,
+    usage: TokenUsage,
+    latency_ms: u64,
+    first_token_ms: Option<u64>,
+    is_streaming: bool,
+    status_code: u16,
+) {
+    use super::usage::logger::UsageLogger;
+
+    let logger = UsageLogger::new(&state.db);
+
+    // 获取 provider 的 cost_multiplier
+    let multiplier = match state.db.get_provider_by_id(provider_id, app_type) {
+        Ok(Some(p)) => {
+            if let Some(meta) = p.meta {
+                if let Some(cm) = meta.cost_multiplier {
+                    Decimal::from_str(&cm).unwrap_or(Decimal::from(1))
+                } else {
+                    Decimal::from(1)
+                }
+            } else {
+                Decimal::from(1)
+            }
+        }
+        _ => Decimal::from(1),
+    };
+
+    let request_id = uuid::Uuid::new_v4().to_string();
+
+    if let Err(e) = logger.log_with_calculation(
+        request_id,
+        provider_id.to_string(),
+        app_type.to_string(),
+        model.to_string(),
+        usage,
+        multiplier,
+        latency_ms,
+        first_token_ms,
+        status_code,
+        None,
+        None, // provider_type
+        is_streaming,
+    ) {
+        log::warn!("记录使用量失败: {e}");
+    }
+}
+
+/// 创建带日志记录的透传流
+pub fn create_logged_passthrough_stream(
+    stream: impl Stream<Item = Result<Bytes, std::io::Error>> + Send + 'static,
+    tag: &'static str,
+    usage_collector: Option<SseUsageCollector>,
+) -> impl Stream<Item = Result<Bytes, std::io::Error>> + Send {
+    async_stream::stream! {
+        let mut buffer = String::new();
+        let mut collector = usage_collector;
+
+        tokio::pin!(stream);
+
+        while let Some(chunk) = stream.next().await {
+            match chunk {
+                Ok(bytes) => {
+                    let text = String::from_utf8_lossy(&bytes);
+                    buffer.push_str(&text);
+
+                    // 尝试解析并记录完整的 SSE 事件
+                    while let Some(pos) = buffer.find("\n\n") {
+                        let event_text = buffer[..pos].to_string();
+                        buffer = buffer[pos + 2..].to_string();
+
+                        if !event_text.trim().is_empty() {
+                            // 提取 data 部分并尝试解析为 JSON
+                            for line in event_text.lines() {
+                                if let Some(data) = line.strip_prefix("data: ") {
+                                    if data.trim() != "[DONE]" {
+                                        if let Ok(json_value) = serde_json::from_str::<Value>(data) {
+                                            if let Some(c) = &collector {
+                                                c.push(json_value.clone()).await;
+                                            }
+                                            log::info!(
+                                                "[{}] <<< SSE 事件:\n{}",
+                                                tag,
+                                                serde_json::to_string_pretty(&json_value).unwrap_or_else(|_| data.to_string())
+                                            );
+                                        } else {
+                                            log::info!("[{tag}] <<< SSE 数据: {data}");
+                                        }
+                                    } else {
+                                        log::info!("[{tag}] <<< SSE: [DONE]");
+                                    }
+                                }
+                            }
+                        }
+                    }
+
+                    yield Ok(bytes);
+                }
+                Err(e) => {
+                    log::error!("[{tag}] 流错误: {e}");
+                    yield Err(std::io::Error::other(e.to_string()));
+                    break;
+                }
+            }
+        }
+
+        log::info!("[{}] ====== 流结束 ======", tag);
+
+        if let Some(c) = collector.take() {
+            c.finish().await;
+        }
+    }
+}
@@ -1,70 +0,0 @@
-//! Provider路由器
-//!
-//! 负责选择合适的Provider进行请求转发
-
-use super::ProxyError;
-use crate::{app_config::AppType, database::Database, provider::Provider};
-use std::sync::Arc;
-
-pub struct ProviderRouter {
-    db: Arc<Database>,
-}
-
-impl ProviderRouter {
-    pub fn new(db: Arc<Database>) -> Self {
-        Self { db }
-    }
-
-    /// 选择Provider（只使用标记为代理目标的 Provider）
-    pub async fn select_provider(
-        &self,
-        app_type: &AppType,
-        _failed_ids: &[String],
-    ) -> Result<Provider, ProxyError> {
-        // 1. 获取 Proxy Target Provider ID
-        let proxy_target_id = self
-            .db
-            .get_proxy_target_provider(app_type.as_str())
-            .map_err(|e| ProxyError::DatabaseError(e.to_string()))?;
-
-        let target_id = proxy_target_id.ok_or_else(|| {
-            log::warn!("[{}] 未设置代理目标 Provider", app_type.as_str());
-            ProxyError::NoAvailableProvider
-        })?;
-
-        // 2. 获取所有 Provider
-        let providers = self
-            .db
-            .get_all_providers(app_type.as_str())
-            .map_err(|e| ProxyError::DatabaseError(e.to_string()))?;
-
-        // 3. 找到目标 Provider
-        let target = providers.get(&target_id).ok_or_else(|| {
-            log::warn!(
-                "[{}] 代理目标 Provider 不存在: {}",
-                app_type.as_str(),
-                target_id
-            );
-            ProxyError::NoAvailableProvider
-        })?;
-
-        log::info!(
-            "[{}] 使用代理目标 Provider: {}",
-            app_type.as_str(),
-            target.name
-        );
-        Ok(target.clone())
-    }
-
-    /// 更新Provider健康状态（保留接口但不影响选择）
-    #[allow(dead_code)]
-    pub async fn update_health(
-        &self,
-        _provider: &Provider,
-        _app_type: &AppType,
-        _success: bool,
-        _error_msg: Option<String>,
-    ) {
-        // 不再记录健康状态
-    }
-}
@@ -2,7 +2,10 @@
 //!
 //! 基于Axum的HTTP服务器，处理代理请求

-use super::{handlers, types::*, ProxyError};
+use super::{
+    failover_switch::FailoverSwitchManager, handlers, provider_router::ProviderRouter, types::*,
+    ProxyError,
+};
 use crate::database::Database;
 use axum::{
    routing::{get, post},
@@ -11,6 +14,7 @@ use axum::{
 use std::net::SocketAddr;
 use std::sync::Arc;
 use tokio::sync::{oneshot, RwLock};
+use tokio::task::JoinHandle;
 use tower_http::cors::{Any, CorsLayer};

 /// 代理服务器状态（共享）
@@ -22,6 +26,12 @@ pub struct ProxyState {
    pub start_time: Arc<RwLock<Option<std::time::Instant>>>,
    /// 每个应用类型当前使用的 provider (app_type -> (provider_id, provider_name))
    pub current_providers: Arc<RwLock<std::collections::HashMap<String, (String, String)>>>,
+    /// 共享的 ProviderRouter（持有熔断器状态，跨请求保持）
+    pub provider_router: Arc<ProviderRouter>,
+    /// AppHandle，用于发射事件和更新托盘菜单
+    pub app_handle: Option<tauri::AppHandle>,
+    /// 故障转移切换管理器
+    pub failover_manager: Arc<FailoverSwitchManager>,
 }

 /// 代理HTTP服务器
@@ -29,22 +39,37 @@ pub struct ProxyServer {
    config: ProxyConfig,
    state: ProxyState,
    shutdown_tx: Arc<RwLock<Option<oneshot::Sender<()>>>>,
+    /// 服务器任务句柄，用于等待服务器实际关闭
+    server_handle: Arc<RwLock<Option<JoinHandle<()>>>>,
 }

 impl ProxyServer {
-    pub fn new(config: ProxyConfig, db: Arc<Database>) -> Self {
+    pub fn new(
+        config: ProxyConfig,
+        db: Arc<Database>,
+        app_handle: Option<tauri::AppHandle>,
+    ) -> Self {
+        // 创建共享的 ProviderRouter（熔断器状态将跨所有请求保持）
+        let provider_router = Arc::new(ProviderRouter::new(db.clone()));
+        // 创建故障转移切换管理器
+        let failover_manager = Arc::new(FailoverSwitchManager::new(db.clone()));
+
        let state = ProxyState {
            db,
            config: Arc::new(RwLock::new(config.clone())),
            status: Arc::new(RwLock::new(ProxyStatus::default())),
            start_time: Arc::new(RwLock::new(None)),
            current_providers: Arc::new(RwLock::new(std::collections::HashMap::new())),
+            provider_router,
+            app_handle,
+            failover_manager,
        };

        Self {
            config,
            state,
            shutdown_tx: Arc::new(RwLock::new(None)),
+            server_handle: Arc::new(RwLock::new(None)),
        }
    }

@@ -87,7 +112,7 @@ impl ProxyServer {

        // 启动服务器
        let state = self.state.clone();
-        tokio::spawn(async move {
+        let handle = tokio::spawn(async move {
            axum::serve(listener, app)
                .with_graceful_shutdown(async {
                    shutdown_rx.await.ok();
@@ -100,6 +125,9 @@ impl ProxyServer {
            *state.start_time.write().await = None;
        });

+        // 保存服务器任务句柄
+        *self.server_handle.write().await = Some(handle);
+
        Ok(ProxyServerInfo {
            address: self.config.listen_address.clone(),
            port: self.config.listen_port,
@@ -108,12 +136,23 @@ impl ProxyServer {
    }

    pub async fn stop(&self) -> Result<(), ProxyError> {
+        // 1. 发送关闭信号
        if let Some(tx) = self.shutdown_tx.write().await.take() {
            let _ = tx.send(());
-            Ok(())
        } else {
-            Err(ProxyError::NotRunning)
+            return Err(ProxyError::NotRunning);
        }
+
+        // 2. 等待服务器任务结束（带 5 秒超时保护）
+        if let Some(handle) = self.server_handle.write().await.take() {
+            match tokio::time::timeout(std::time::Duration::from_secs(5), handle).await {
+                Ok(Ok(())) => log::info!("代理服务器已完全停止"),
+                Ok(Err(e)) => log::warn!("代理服务器任务异常终止: {e}"),
+                Err(_) => log::warn!("代理服务器停止超时（5秒），强制继续"),
+            }
+        }
+
+        Ok(())
    }

    pub async fn get_status(&self) -> ProxyStatus {
@@ -148,17 +187,31 @@ impl ProxyServer {
            // 健康检查
            .route("/health", get(handlers::health_check))
            .route("/status", get(handlers::get_status))
-            // Claude API
+            // Claude API (支持带前缀和不带前缀两种格式)
            .route("/v1/messages", post(handlers::handle_messages))
-            // OpenAI Chat Completions API (Codex CLI)
+            .route("/claude/v1/messages", post(handlers::handle_messages))
+            // OpenAI Chat Completions API (Codex CLI，支持带前缀和不带前缀)
+            .route("/chat/completions", post(handlers::handle_chat_completions))
            .route(
                "/v1/chat/completions",
                post(handlers::handle_chat_completions),
            )
-            // OpenAI Responses API (Codex CLI)
+            .route(
+                "/v1/v1/chat/completions",
+                post(handlers::handle_chat_completions),
+            )
+            .route(
+                "/codex/v1/chat/completions",
+                post(handlers::handle_chat_completions),
+            )
+            // OpenAI Responses API (Codex CLI，支持带前缀和不带前缀)
+            .route("/responses", post(handlers::handle_responses))
            .route("/v1/responses", post(handlers::handle_responses))
-            // Gemini API
+            .route("/v1/v1/responses", post(handlers::handle_responses))
+            .route("/codex/v1/responses", post(handlers::handle_responses))
+            // Gemini API (支持带前缀和不带前缀)
            .route("/v1beta/*path", post(handlers::handle_gemini))
+            .route("/gemini/v1beta/*path", post(handlers::handle_gemini))
            .layer(cors)
            .with_state(self.state.clone())
    }
@@ -167,4 +220,22 @@ impl ProxyServer {
    pub async fn apply_runtime_config(&self, config: &ProxyConfig) {
        *self.state.config.write().await = config.clone();
    }
+
+    /// 热更新熔断器配置
+    ///
+    /// 将新配置应用到所有已创建的熔断器实例
+    pub async fn update_circuit_breaker_configs(
+        &self,
+        config: super::circuit_breaker::CircuitBreakerConfig,
+    ) {
+        self.state.provider_router.update_all_configs(config).await;
+    }
+
+    /// 重置指定 Provider 的熔断器
+    pub async fn reset_provider_circuit_breaker(&self, provider_id: &str, app_type: &str) {
+        self.state
+            .provider_router
+            .reset_provider_breaker(provider_id, app_type)
+            .await;
+    }
 }
@@ -15,6 +15,9 @@ pub struct ProxyConfig {
    pub request_timeout: u64,
    /// 是否启用日志
    pub enable_logging: bool,
+    /// 是否正在接管 Live 配置
+    #[serde(default)]
+    pub live_takeover_active: bool,
 }

 impl Default for ProxyConfig {
@@ -26,6 +29,7 @@ impl Default for ProxyConfig {
            max_retries: 3,
            request_timeout: 300,
            enable_logging: true,
+            live_takeover_active: false,
        }
    }
 }
@@ -82,6 +86,14 @@ pub struct ProxyServerInfo {
    pub started_at: String,
 }

+/// 各应用的接管状态（是否改写该应用的 Live 配置指向本地代理）
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+pub struct ProxyTakeoverStatus {
+    pub claude: bool,
+    pub codex: bool,
+    pub gemini: bool,
+}
+
 /// API 格式类型（预留，当前不需要格式转换）
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 #[allow(dead_code)]
@@ -104,16 +116,13 @@ pub struct ProviderHealth {
    pub updated_at: String,
 }

-/// 使用统计记录
+/// Live 配置备份记录
 #[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct ProxyUsageRecord {
-    pub provider_id: String,
+pub struct LiveBackup {
+    /// 应用类型 (claude/codex/gemini)
    pub app_type: String,
-    pub endpoint: String,
-    pub request_tokens: Option<i32>,
-    pub response_tokens: Option<i32>,
-    pub status_code: u16,
-    pub latency_ms: u64,
-    pub error: Option<String>,
-    pub timestamp: String,
+    /// 原始配置 JSON
+    pub original_config: String,
+    /// 备份时间
+    pub backed_up_at: String,
 }
@@ -107,6 +107,8 @@ impl<'a> UsageLogger<'a> {
    }

    /// 记录失败的请求
+    ///
+    /// 用于记录无法从上游获取 usage 信息的失败请求
    #[allow(dead_code, clippy::too_many_arguments)]
    pub fn log_error(
        &self,
@@ -138,6 +140,43 @@ impl<'a> UsageLogger<'a> {
        self.log_request(&log)
    }

+    /// 记录失败的请求（带更多上下文信息）
+    ///
+    /// 相比 log_error，这个方法接受更多参数以提供完整的请求上下文
+    #[allow(clippy::too_many_arguments)]
+    pub fn log_error_with_context(
+        &self,
+        request_id: String,
+        provider_id: String,
+        app_type: String,
+        model: String,
+        status_code: u16,
+        error_message: String,
+        latency_ms: u64,
+        is_streaming: bool,
+        session_id: Option<String>,
+        provider_type: Option<String>,
+    ) -> Result<(), AppError> {
+        let log = RequestLog {
+            request_id,
+            provider_id,
+            app_type,
+            model,
+            usage: TokenUsage::default(),
+            cost: None,
+            latency_ms,
+            first_token_ms: None,
+            status_code,
+            error_message: Some(error_message),
+            session_id,
+            provider_type,
+            is_streaming,
+            cost_multiplier: "1.0".to_string(),
+        };
+
+        self.log_request(&log)
+    }
+
    /// 获取模型定价
    pub fn get_model_pricing(&self, model_id: &str) -> Result<Option<ModelPricing>, AppError> {
        let conn = crate::database::lock_conn!(self.db.conn);
@@ -17,8 +17,27 @@ impl McpService {

    /// 添加或更新 MCP 服务器
    pub fn upsert_server(state: &AppState, server: McpServer) -> Result<(), AppError> {
+        // 读取旧状态：用于处理“编辑时取消勾选某个应用”的场景（需要从对应 live 配置中移除）
+        let prev_apps = state
+            .db
+            .get_all_mcp_servers()?
+            .get(&server.id)
+            .map(|s| s.apps.clone())
+            .unwrap_or_default();
+
        state.db.save_mcp_server(&server)?;

+        // 处理禁用：若旧版本启用但新版本取消，则需要从该应用的 live 配置移除
+        if prev_apps.claude && !server.apps.claude {
+            Self::remove_server_from_app(state, &server.id, &AppType::Claude)?;
+        }
+        if prev_apps.codex && !server.apps.codex {
+            Self::remove_server_from_app(state, &server.id, &AppType::Codex)?;
+        }
+        if prev_apps.gemini && !server.apps.gemini {
+            Self::remove_server_from_app(state, &server.id, &AppType::Gemini)?;
+        }
+
        // 同步到各个启用的应用
        Self::sync_server_to_apps(state, &server)?;

@@ -190,10 +209,22 @@ impl McpService {
        // 如果有导入的服务器，保存到数据库
        if count > 0 {
            if let Some(servers) = &temp_config.mcp.servers {
+                let mut existing = state.db.get_all_mcp_servers()?;
                for server in servers.values() {
-                    state.db.save_mcp_server(server)?;
-                    // 同步到 Claude live 配置
-                    Self::sync_server_to_apps(state, server)?;
+                    // 已存在：仅启用 Claude，不覆盖其他字段（与导入模块语义保持一致）
+                    let to_save = if let Some(existing_server) = existing.get(&server.id) {
+                        let mut merged = existing_server.clone();
+                        merged.apps.claude = true;
+                        merged
+                    } else {
+                        server.clone()
+                    };
+
+                    state.db.save_mcp_server(&to_save)?;
+                    existing.insert(to_save.id.clone(), to_save.clone());
+
+                    // 同步到对应应用 live 配置
+                    Self::sync_server_to_apps(state, &to_save)?;
                }
            }
        }
@@ -212,10 +243,22 @@ impl McpService {
        // 如果有导入的服务器，保存到数据库
        if count > 0 {
            if let Some(servers) = &temp_config.mcp.servers {
+                let mut existing = state.db.get_all_mcp_servers()?;
                for server in servers.values() {
-                    state.db.save_mcp_server(server)?;
-                    // 同步到 Codex live 配置
-                    Self::sync_server_to_apps(state, server)?;
+                    // 已存在：仅启用 Codex，不覆盖其他字段（与导入模块语义保持一致）
+                    let to_save = if let Some(existing_server) = existing.get(&server.id) {
+                        let mut merged = existing_server.clone();
+                        merged.apps.codex = true;
+                        merged
+                    } else {
+                        server.clone()
+                    };
+
+                    state.db.save_mcp_server(&to_save)?;
+                    existing.insert(to_save.id.clone(), to_save.clone());
+
+                    // 同步到对应应用 live 配置
+                    Self::sync_server_to_apps(state, &to_save)?;
                }
            }
        }
@@ -234,10 +277,22 @@ impl McpService {
        // 如果有导入的服务器，保存到数据库
        if count > 0 {
            if let Some(servers) = &temp_config.mcp.servers {
+                let mut existing = state.db.get_all_mcp_servers()?;
                for server in servers.values() {
-                    state.db.save_mcp_server(server)?;
-                    // 同步到 Gemini live 配置
-                    Self::sync_server_to_apps(state, server)?;
+                    // 已存在：仅启用 Gemini，不覆盖其他字段（与导入模块语义保持一致）
+                    let to_save = if let Some(existing_server) = existing.get(&server.id) {
+                        let mut merged = existing_server.clone();
+                        merged.apps.gemini = true;
+                        merged
+                    } else {
+                        server.clone()
+                    };
+
+                    state.db.save_mcp_server(&to_save)?;
+                    existing.insert(to_save.id.clone(), to_save.clone());
+
+                    // 同步到对应应用 live 配置
+                    Self::sync_server_to_apps(state, &to_save)?;
                }
            }
        }
@@ -2,18 +2,16 @@ pub mod config;
 pub mod env_checker;
 pub mod env_manager;
 pub mod mcp;
-pub mod model_test;
 pub mod prompt;
 pub mod provider;
 pub mod proxy;
 pub mod skill;
 pub mod speedtest;
+pub mod stream_check;
 pub mod usage_stats;

 pub use config::ConfigService;
 pub use mcp::McpService;
-#[allow(unused_imports)]
-pub use model_test::{ModelTestConfig, ModelTestLog, ModelTestResult, ModelTestService};
 pub use prompt::PromptService;
 pub use provider::{ProviderService, ProviderSortUpdate};
 pub use proxy::ProxyService;
@@ -1,510 +0,0 @@
-//! 模型测试服务
-//!
-//! 提供独立的模型可用性测试功能，复用现有 Provider 适配器逻辑，
-//! 但不影响正常代理数据流程。测试结果记录到独立的日志表。
-
-use crate::app_config::AppType;
-use crate::database::Database;
-use crate::error::AppError;
-use crate::provider::Provider;
-use crate::proxy::providers::{get_adapter, AuthInfo, ProviderAdapter};
-use reqwest::Client;
-use serde::{Deserialize, Serialize};
-use serde_json::{json, Value};
-use std::time::{Duration, Instant};
-
-/// 模型测试配置
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct ModelTestConfig {
-    /// 默认测试模型（Claude）
-    pub claude_model: String,
-    /// 默认测试模型（Codex/OpenAI）
-    pub codex_model: String,
-    /// 默认测试模型（Gemini）
-    pub gemini_model: String,
-    /// 测试提示词
-    pub test_prompt: String,
-    /// 超时时间（秒）
-    pub timeout_secs: u64,
-}
-
-impl Default for ModelTestConfig {
-    fn default() -> Self {
-        Self {
-            claude_model: "claude-haiku-4-5-20251001".to_string(),
-            codex_model: "gpt-5.1-low".to_string(),
-            gemini_model: "gemini-3-pro-low".to_string(),
-            test_prompt: "ping".to_string(),
-            timeout_secs: 15,
-        }
-    }
-}
-
-/// 模型测试结果
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct ModelTestResult {
-    pub success: bool,
-    pub message: String,
-    pub response_time_ms: Option<u64>,
-    pub http_status: Option<u16>,
-    pub model_used: String,
-    pub tested_at: i64,
-}
-
-/// 模型测试日志记录
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct ModelTestLog {
-    pub id: i64,
-    pub provider_id: String,
-    pub provider_name: String,
-    pub app_type: String,
-    pub model: String,
-    pub prompt: String,
-    pub success: bool,
-    pub message: String,
-    pub response_time_ms: Option<i64>,
-    pub http_status: Option<i64>,
-    pub tested_at: i64,
-}
-
-/// 模型测试服务
-pub struct ModelTestService;
-
-impl ModelTestService {
-    /// 测试单个供应商的模型可用性
-    pub async fn test_provider(
-        app_type: &AppType,
-        provider: &Provider,
-        config: &ModelTestConfig,
-    ) -> Result<ModelTestResult, AppError> {
-        let start = Instant::now();
-        let adapter = get_adapter(app_type);
-
-        // 构建 HTTP 客户端（独立于代理服务）
-        let client = Client::builder()
-            .timeout(Duration::from_secs(config.timeout_secs))
-            .build()
-            .map_err(|e| AppError::Message(format!("创建 HTTP 客户端失败: {e}")))?;
-
-        // 根据 AppType 选择测试模型
-        let model = match app_type {
-            AppType::Claude => &config.claude_model,
-            AppType::Codex => &config.codex_model,
-            AppType::Gemini => &config.gemini_model,
-        };
-
-        let result = match app_type {
-            AppType::Claude => {
-                Self::test_claude(
-                    &client,
-                    provider,
-                    adapter.as_ref(),
-                    model,
-                    &config.test_prompt,
-                )
-                .await
-            }
-            AppType::Codex => {
-                Self::test_codex(
-                    &client,
-                    provider,
-                    adapter.as_ref(),
-                    model,
-                    &config.test_prompt,
-                )
-                .await
-            }
-            AppType::Gemini => {
-                Self::test_gemini(
-                    &client,
-                    provider,
-                    adapter.as_ref(),
-                    model,
-                    &config.test_prompt,
-                )
-                .await
-            }
-        };
-
-        let response_time = start.elapsed().as_millis() as u64;
-        let tested_at = chrono::Utc::now().timestamp();
-
-        match result {
-            Ok((status, msg)) => Ok(ModelTestResult {
-                success: true,
-                message: msg,
-                response_time_ms: Some(response_time),
-                http_status: Some(status),
-                model_used: model.clone(),
-                tested_at,
-            }),
-            Err(e) => Ok(ModelTestResult {
-                success: false,
-                message: e.to_string(),
-                response_time_ms: Some(response_time),
-                http_status: None,
-                model_used: model.clone(),
-                tested_at,
-            }),
-        }
-    }
-
-    /// 测试 Claude (Anthropic Messages API)
-    async fn test_claude(
-        client: &Client,
-        provider: &Provider,
-        adapter: &dyn ProviderAdapter,
-        model: &str,
-        prompt: &str,
-    ) -> Result<(u16, String), AppError> {
-        let base_url = adapter
-            .extract_base_url(provider)
-            .map_err(|e| AppError::Message(format!("提取 base_url 失败: {e}")))?;
-
-        let auth = adapter
-            .extract_auth(provider)
-            .ok_or_else(|| AppError::Message("未找到 API Key".to_string()))?;
-
-        // 智能拼接 URL，避免重复 /v1
-        let base = base_url.trim_end_matches('/');
-        let url = if base.ends_with("/v1") {
-            format!("{base}/messages")
-        } else {
-            format!("{base}/v1/messages")
-        };
-
-        let body = json!({
-            "model": model,
-            "max_tokens": 1,
-            "messages": [{
-                "role": "user",
-                "content": prompt
-            }]
-        });
-
-        let mut request = client.post(&url).json(&body);
-        request = Self::add_claude_auth(request, &auth);
-
-        let response = request.send().await.map_err(|e| {
-            if e.is_timeout() {
-                AppError::Message("请求超时".to_string())
-            } else if e.is_connect() {
-                AppError::Message(format!("连接失败: {e}"))
-            } else {
-                AppError::Message(e.to_string())
-            }
-        })?;
-
-        let status = response.status().as_u16();
-
-        if response.status().is_success() {
-            // 先获取文本，再尝试解析 JSON（兼容流式响应）
-            let text = response.text().await.unwrap_or_default();
-
-            // 尝试解析 JSON
-            if let Ok(data) = serde_json::from_str::<Value>(&text) {
-                if data.get("type").is_some()
-                    || data.get("content").is_some()
-                    || data.get("id").is_some()
-                {
-                    return Ok((status, "模型测试成功".to_string()));
-                }
-            }
-
-            // 即使无法解析 JSON，只要状态码是 200 就认为成功
-            Ok((status, "模型测试成功".to_string()))
-        } else {
-            let error_text = response.text().await.unwrap_or_default();
-            Err(AppError::Message(format!("HTTP {status}: {error_text}")))
-        }
-    }
-
-    /// 测试 Codex (OpenAI Chat Completions API)
-    async fn test_codex(
-        client: &Client,
-        provider: &Provider,
-        adapter: &dyn ProviderAdapter,
-        model: &str,
-        prompt: &str,
-    ) -> Result<(u16, String), AppError> {
-        let base_url = adapter
-            .extract_base_url(provider)
-            .map_err(|e| AppError::Message(format!("提取 base_url 失败: {e}")))?;
-
-        let auth = adapter
-            .extract_auth(provider)
-            .ok_or_else(|| AppError::Message("未找到 API Key".to_string()))?;
-
-        // 智能拼接 URL，避免重复 /v1
-        let base = base_url.trim_end_matches('/');
-        let url = if base.ends_with("/v1") {
-            format!("{base}/chat/completions")
-        } else {
-            format!("{base}/v1/chat/completions")
-        };
-
-        let body = json!({
-            "model": model,
-            "messages": [{
-                "role": "user",
-                "content": prompt
-            }],
-            "max_tokens": 1,
-            "stream": false
-        });
-
-        let request = client
-            .post(&url)
-            .header("Authorization", format!("Bearer {}", auth.api_key))
-            .header("Content-Type", "application/json")
-            .json(&body);
-
-        let response = request.send().await.map_err(|e| {
-            if e.is_timeout() {
-                AppError::Message("请求超时".to_string())
-            } else if e.is_connect() {
-                AppError::Message(format!("连接失败: {e}"))
-            } else {
-                AppError::Message(e.to_string())
-            }
-        })?;
-
-        let status = response.status().as_u16();
-
-        if response.status().is_success() {
-            // 先获取文本，再尝试解析 JSON
-            let text = response.text().await.unwrap_or_default();
-
-            if let Ok(data) = serde_json::from_str::<Value>(&text) {
-                if data.get("choices").is_some() || data.get("id").is_some() {
-                    return Ok((status, "模型测试成功".to_string()));
-                }
-            }
-
-            // 即使无法解析 JSON，只要状态码是 200 就认为成功
-            Ok((status, "模型测试成功".to_string()))
-        } else {
-            let error_text = response.text().await.unwrap_or_default();
-            Err(AppError::Message(format!("HTTP {status}: {error_text}")))
-        }
-    }
-
-    /// 测试 Gemini (Google Generative AI API)
-    async fn test_gemini(
-        client: &Client,
-        provider: &Provider,
-        adapter: &dyn ProviderAdapter,
-        model: &str,
-        prompt: &str,
-    ) -> Result<(u16, String), AppError> {
-        let base_url = adapter
-            .extract_base_url(provider)
-            .map_err(|e| AppError::Message(format!("提取 base_url 失败: {e}")))?;
-
-        let auth = adapter
-            .extract_auth(provider)
-            .ok_or_else(|| AppError::Message("未找到 API Key".to_string()))?;
-
-        let url = format!(
-            "{}/v1beta/models/{}:generateContent?key={}",
-            base_url.trim_end_matches('/'),
-            model,
-            auth.api_key
-        );
-
-        let body = json!({
-            "contents": [{
-                "parts": [{
-                    "text": prompt
-                }]
-            }],
-            "generationConfig": {
-                "maxOutputTokens": 1
-            }
-        });
-
-        let request = client
-            .post(&url)
-            .header("Content-Type", "application/json")
-            .json(&body);
-
-        let response = request.send().await.map_err(|e| {
-            if e.is_timeout() {
-                AppError::Message("请求超时".to_string())
-            } else if e.is_connect() {
-                AppError::Message(format!("连接失败: {e}"))
-            } else {
-                AppError::Message(e.to_string())
-            }
-        })?;
-
-        let status = response.status().as_u16();
-
-        if response.status().is_success() {
-            let data: Value = response
-                .json()
-                .await
-                .map_err(|e| AppError::Message(format!("解析响应失败: {e}")))?;
-
-            if data.get("candidates").is_some() {
-                Ok((status, "模型测试成功".to_string()))
-            } else {
-                Err(AppError::Message("响应格式异常".to_string()))
-            }
-        } else {
-            let error_text = response.text().await.unwrap_or_default();
-            Err(AppError::Message(format!("HTTP {status}: {error_text}")))
-        }
-    }
-
-    /// 添加 Claude 认证头
-    fn add_claude_auth(
-        request: reqwest::RequestBuilder,
-        auth: &AuthInfo,
-    ) -> reqwest::RequestBuilder {
-        request
-            .header("x-api-key", &auth.api_key)
-            .header("anthropic-version", "2023-06-01")
-            .header("Content-Type", "application/json")
-    }
-}
-
-// ===== 数据库操作 =====
-
-impl Database {
-    /// 保存模型测试日志
-    pub fn save_model_test_log(
-        &self,
-        provider_id: &str,
-        provider_name: &str,
-        app_type: &str,
-        model: &str,
-        prompt: &str,
-        result: &ModelTestResult,
-    ) -> Result<i64, AppError> {
-        let conn = self
-            .conn
-            .lock()
-            .map_err(|e| AppError::Database(format!("获取数据库连接失败: {e}")))?;
-
-        conn.execute(
-            "INSERT INTO model_test_logs 
-             (provider_id, provider_name, app_type, model, prompt, success, message, response_time_ms, http_status, tested_at)
-             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10)",
-            rusqlite::params![
-                provider_id,
-                provider_name,
-                app_type,
-                model,
-                prompt,
-                result.success,
-                result.message,
-                result.response_time_ms.map(|t| t as i64),
-                result.http_status.map(|s| s as i64),
-                result.tested_at,
-            ],
-        )
-        .map_err(|e| AppError::Database(e.to_string()))?;
-
-        Ok(conn.last_insert_rowid())
-    }
-
-    /// 获取模型测试日志
-    pub fn get_model_test_logs(
-        &self,
-        app_type: Option<&str>,
-        provider_id: Option<&str>,
-        limit: u32,
-    ) -> Result<Vec<ModelTestLog>, AppError> {
-        let conn = self
-            .conn
-            .lock()
-            .map_err(|e| AppError::Database(format!("获取数据库连接失败: {e}")))?;
-
-        let mut sql = String::from(
-            "SELECT id, provider_id, provider_name, app_type, model, prompt, success, message, response_time_ms, http_status, tested_at
-             FROM model_test_logs WHERE 1=1"
-        );
-
-        let mut params: Vec<Box<dyn rusqlite::ToSql>> = Vec::new();
-
-        if let Some(at) = app_type {
-            sql.push_str(" AND app_type = ?");
-            params.push(Box::new(at.to_string()));
-        }
-
-        if let Some(pid) = provider_id {
-            sql.push_str(" AND provider_id = ?");
-            params.push(Box::new(pid.to_string()));
-        }
-
-        sql.push_str(" ORDER BY tested_at DESC LIMIT ?");
-        params.push(Box::new(limit as i64));
-
-        let params_refs: Vec<&dyn rusqlite::ToSql> = params.iter().map(|p| p.as_ref()).collect();
-
-        let mut stmt = conn
-            .prepare(&sql)
-            .map_err(|e| AppError::Database(e.to_string()))?;
-
-        let logs = stmt
-            .query_map(params_refs.as_slice(), |row| {
-                Ok(ModelTestLog {
-                    id: row.get(0)?,
-                    provider_id: row.get(1)?,
-                    provider_name: row.get(2)?,
-                    app_type: row.get(3)?,
-                    model: row.get(4)?,
-                    prompt: row.get(5)?,
-                    success: row.get(6)?,
-                    message: row.get(7)?,
-                    response_time_ms: row.get(8)?,
-                    http_status: row.get(9)?,
-                    tested_at: row.get(10)?,
-                })
-            })
-            .map_err(|e| AppError::Database(e.to_string()))?
-            .collect::<Result<Vec<_>, _>>()
-            .map_err(|e| AppError::Database(e.to_string()))?;
-
-        Ok(logs)
-    }
-
-    /// 获取模型测试配置
-    pub fn get_model_test_config(&self) -> Result<ModelTestConfig, AppError> {
-        match self.get_setting("model_test_config")? {
-            Some(json) => serde_json::from_str(&json)
-                .map_err(|e| AppError::Message(format!("解析模型测试配置失败: {e}"))),
-            None => Ok(ModelTestConfig::default()),
-        }
-    }
-
-    /// 保存模型测试配置
-    pub fn save_model_test_config(&self, config: &ModelTestConfig) -> Result<(), AppError> {
-        let json = serde_json::to_string(config)
-            .map_err(|e| AppError::Message(format!("序列化模型测试配置失败: {e}")))?;
-        self.set_setting("model_test_config", &json)
-    }
-
-    /// 清理旧的测试日志（保留最近 N 条）
-    pub fn cleanup_model_test_logs(&self, keep_count: u32) -> Result<u64, AppError> {
-        let conn = self
-            .conn
-            .lock()
-            .map_err(|e| AppError::Database(format!("获取数据库连接失败: {e}")))?;
-
-        let deleted = conn
-            .execute(
-                "DELETE FROM model_test_logs WHERE id NOT IN (
-                SELECT id FROM model_test_logs ORDER BY tested_at DESC LIMIT ?
-            )",
-                rusqlite::params![keep_count as i64],
-            )
-            .map_err(|e| AppError::Database(e.to_string()))?;
-
-        Ok(deleted as u64)
-    }
-}
@@ -144,9 +144,29 @@ impl ProviderService {
        state.db.save_provider(app_type.as_str(), &provider)?;

        if is_current {
-            write_live_snapshot(&app_type, &provider)?;
-            // Sync MCP
-            McpService::sync_all_enabled(state)?;
+            // 如果代理接管模式处于激活状态，并且代理服务正在运行：
+            // - 不写 Live 配置（否则会破坏接管）
+            // - 仅更新 Live 备份（保证关闭代理时能恢复到最新配置）
+            let is_app_taken_over =
+                futures::executor::block_on(state.db.get_live_backup(app_type.as_str()))
+                    .ok()
+                    .flatten()
+                    .is_some();
+            let is_proxy_running = futures::executor::block_on(state.proxy_service.is_running());
+            let should_skip_live_write = is_app_taken_over && is_proxy_running;
+
+            if should_skip_live_write {
+                futures::executor::block_on(
+                    state
+                        .proxy_service
+                        .update_live_backup_from_provider(app_type.as_str(), &provider),
+                )
+                .map_err(|e| AppError::Message(format!("更新 Live 备份失败: {e}")))?;
+            } else {
+                write_live_snapshot(&app_type, &provider)?;
+                // Sync MCP
+                McpService::sync_all_enabled(state)?;
+            }
        }

        Ok(true)
@@ -173,14 +193,77 @@ impl ProviderService {
    ///
    /// Switch flow:
    /// 1. Validate target provider exists
-    /// 2. **Backfill mechanism**: Backfill current live config to current provider, protect user manual modifications
-    /// 3. Update local settings current_provider_xxx (device-level)
-    /// 4. Update database is_current (as default for new devices)
-    /// 5. Write target provider config to live files
-    /// 6. Sync MCP configuration
+    /// 2. Check if proxy takeover mode is active AND proxy server is running
+    /// 3. If takeover mode active: hot-switch proxy target only (no Live config write)
+    /// 4. If normal mode:
+    ///    a. **Backfill mechanism**: Backfill current live config to current provider
+    ///    b. Update local settings current_provider_xxx (device-level)
+    ///    c. Update database is_current (as default for new devices)
+    ///    d. Write target provider config to live files
+    ///    e. Sync MCP configuration
    pub fn switch(state: &AppState, app_type: AppType, id: &str) -> Result<(), AppError> {
        // Check if provider exists
        let providers = state.db.get_all_providers(app_type.as_str())?;
+        let _provider = providers
+            .get(id)
+            .ok_or_else(|| AppError::Message(format!("供应商 {id} 不存在")))?;
+
+        // Check if proxy takeover mode is active AND proxy server is actually running
+        // Both conditions must be true to use hot-switch mode
+        // Use blocking wait since this is a sync function
+        let is_app_taken_over =
+            futures::executor::block_on(state.db.get_live_backup(app_type.as_str()))
+                .ok()
+                .flatten()
+                .is_some();
+        let is_proxy_running = futures::executor::block_on(state.proxy_service.is_running());
+
+        // Hot-switch only when BOTH: this app is taken over AND proxy server is actually running
+        let should_hot_switch = is_app_taken_over && is_proxy_running;
+
+        if should_hot_switch {
+            // Proxy takeover mode: hot-switch only, don't write Live config
+            log::info!(
+                "代理接管模式：热切换 {} 的目标供应商为 {}",
+                app_type.as_str(),
+                id
+            );
+
+            // 获取新供应商的完整配置（用于更新备份）
+            let provider = providers
+                .get(id)
+                .ok_or_else(|| AppError::Message(format!("供应商 {id} 不存在")))?;
+
+            // Update database is_current
+            state.db.set_current_provider(app_type.as_str(), id)?;
+
+            // Update local settings for consistency
+            crate::settings::set_current_provider(&app_type, Some(id))?;
+
+            // 更新 Live 备份（确保代理关闭时恢复正确的供应商配置）
+            futures::executor::block_on(
+                state
+                    .proxy_service
+                    .update_live_backup_from_provider(app_type.as_str(), provider),
+            )
+            .map_err(|e| AppError::Message(format!("更新 Live 备份失败: {e}")))?;
+
+            // Note: No Live config write, no MCP sync
+            // The proxy server will route requests to the new provider via is_current
+            return Ok(());
+        }
+
+        // Normal mode: full switch with Live config write
+        Self::switch_normal(state, app_type, id, &providers)
+    }
+
+    /// Normal switch flow (non-proxy mode)
+    fn switch_normal(
+        state: &AppState,
+        app_type: AppType,
+        id: &str,
+        providers: &indexmap::IndexMap<String, Provider>,
+    ) -> Result<(), AppError> {
        let provider = providers
            .get(id)
            .ok_or_else(|| AppError::Message(format!("供应商 {id} 不存在")))?;
@@ -217,18 +300,6 @@ impl ProviderService {
        Ok(())
    }

-    /// Set proxy target provider
-    pub fn set_proxy_target(state: &AppState, app_type: AppType, id: &str) -> Result<(), AppError> {
-        // Check if provider exists
-        let providers = state.db.get_all_providers(app_type.as_str())?;
-        if !providers.contains_key(id) {
-            return Err(AppError::Message(format!("供应商 {id} 不存在")));
-        }
-
-        state.db.set_proxy_target_provider(app_type.as_str(), id)?;
-        Ok(())
-    }
-
    /// Sync current provider to live configuration (re-export)
    pub fn sync_current_to_live(state: &AppState) -> Result<(), AppError> {
        sync_current_to_live(state)
@@ -79,6 +79,34 @@ pub(crate) async fn execute_and_format_usage_result(
    }
 }

+/// Extract API key from provider configuration
+fn extract_api_key_from_provider(provider: &crate::provider::Provider) -> Option<String> {
+    if let Some(env) = provider.settings_config.get("env") {
+        // Try multiple possible API key fields
+        env.get("ANTHROPIC_AUTH_TOKEN")
+            .or_else(|| env.get("ANTHROPIC_API_KEY"))
+            .or_else(|| env.get("OPENROUTER_API_KEY"))
+            .or_else(|| env.get("GOOGLE_API_KEY"))
+            .and_then(|v| v.as_str())
+            .map(|s| s.to_string())
+    } else {
+        None
+    }
+}
+
+/// Extract base URL from provider configuration
+fn extract_base_url_from_provider(provider: &crate::provider::Provider) -> Option<String> {
+    if let Some(env) = provider.settings_config.get("env") {
+        // Try multiple possible base URL fields
+        env.get("ANTHROPIC_BASE_URL")
+            .or_else(|| env.get("GOOGLE_GEMINI_BASE_URL"))
+            .and_then(|v| v.as_str())
+            .map(|s| s.trim_end_matches('/').to_string())
+    } else {
+        None
+    }
+}
+
 /// Query provider usage (using saved script configuration)
 pub async fn query_usage(
    state: &AppState,
@@ -114,12 +142,26 @@ pub async fn query_usage(
            ));
        }

-        // Get credentials directly from UsageScript, no longer extract from provider config
+        // Get credentials: prioritize UsageScript values, fallback to provider config
+        let api_key = usage_script
+            .api_key
+            .clone()
+            .filter(|k| !k.is_empty())
+            .or_else(|| extract_api_key_from_provider(provider))
+            .unwrap_or_default();
+
+        let base_url = usage_script
+            .base_url
+            .clone()
+            .filter(|u| !u.is_empty())
+            .or_else(|| extract_base_url_from_provider(provider))
+            .unwrap_or_default();
+
        (
            usage_script.code.clone(),
            usage_script.timeout.unwrap_or(10),
-            usage_script.api_key.clone().unwrap_or_default(),
-            usage_script.base_url.clone().unwrap_or_default(),
+            api_key,
+            base_url,
            usage_script.access_token.clone(),
            usage_script.user_id.clone(),
        )
@@ -31,40 +31,51 @@ impl SpeedtestService {
            return Ok(vec![]);
        }

+        let mut results: Vec<Option<EndpointLatency>> = vec![None; urls.len()];
+        let mut valid_targets = Vec::new();
+
+        for (idx, raw_url) in urls.into_iter().enumerate() {
+            let trimmed = raw_url.trim().to_string();
+
+            if trimmed.is_empty() {
+                results[idx] = Some(EndpointLatency {
+                    url: raw_url,
+                    latency: None,
+                    status: None,
+                    error: Some("URL 不能为空".to_string()),
+                });
+                continue;
+            }
+
+            match Url::parse(&trimmed) {
+                Ok(parsed_url) => valid_targets.push((idx, trimmed, parsed_url)),
+                Err(err) => {
+                    results[idx] = Some(EndpointLatency {
+                        url: trimmed,
+                        latency: None,
+                        status: None,
+                        error: Some(format!("URL 无效: {err}")),
+                    });
+                }
+            }
+        }
+
+        if valid_targets.is_empty() {
+            return Ok(results.into_iter().flatten().collect::<Vec<_>>());
+        }
+
        let timeout = Self::sanitize_timeout(timeout_secs);
        let client = Self::build_client(timeout)?;

-        let tasks = urls.into_iter().map(|raw_url| {
+        let tasks = valid_targets.into_iter().map(|(idx, trimmed, parsed_url)| {
            let client = client.clone();
            async move {
-                let trimmed = raw_url.trim().to_string();
-                if trimmed.is_empty() {
-                    return EndpointLatency {
-                        url: raw_url,
-                        latency: None,
-                        status: None,
-                        error: Some("URL 不能为空".to_string()),
-                    };
-                }
-
-                let parsed_url = match Url::parse(&trimmed) {
-                    Ok(url) => url,
-                    Err(err) => {
-                        return EndpointLatency {
-                            url: trimmed,
-                            latency: None,
-                            status: None,
-                            error: Some(format!("URL 无效: {err}")),
-                        };
-                    }
-                };
-
                // 先进行一次热身请求，忽略结果，仅用于复用连接/绕过首包惩罚。
                let _ = client.get(parsed_url.clone()).send().await;

                // 第二次请求开始计时，并将其作为结果返回。
                let start = Instant::now();
-                match client.get(parsed_url).send().await {
+                let latency = match client.get(parsed_url).send().await {
                    Ok(resp) => EndpointLatency {
                        url: trimmed,
                        latency: Some(start.elapsed().as_millis()),
@@ -88,11 +99,17 @@ impl SpeedtestService {
                            error: Some(error_message),
                        }
                    }
-                }
+                };
+
+                (idx, latency)
            }
        });

-        Ok(join_all(tasks).await)
+        for (idx, latency) in join_all(tasks).await {
+            results[idx] = Some(latency);
+        }
+
+        Ok(results.into_iter().flatten().collect::<Vec<_>>())
    }

    fn build_client(timeout_secs: u64) -> Result<Client, AppError> {
@@ -0,0 +1,436 @@
+//! 流式健康检查服务
+//!
+//! 使用流式 API 进行快速健康检查，只需接收首个 chunk 即判定成功。
+
+use futures::StreamExt;
+use reqwest::Client;
+use serde::{Deserialize, Serialize};
+use serde_json::json;
+use std::time::{Duration, Instant};
+
+use crate::app_config::AppType;
+use crate::error::AppError;
+use crate::provider::Provider;
+use crate::proxy::providers::{get_adapter, AuthInfo};
+
+/// 健康状态枚举
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
+#[serde(rename_all = "lowercase")]
+pub enum HealthStatus {
+    Operational,
+    Degraded,
+    Failed,
+}
+
+/// 流式检查配置
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct StreamCheckConfig {
+    pub timeout_secs: u64,
+    pub max_retries: u32,
+    pub degraded_threshold_ms: u64,
+    /// Claude 测试模型
+    pub claude_model: String,
+    /// Codex 测试模型
+    pub codex_model: String,
+    /// Gemini 测试模型
+    pub gemini_model: String,
+}
+
+impl Default for StreamCheckConfig {
+    fn default() -> Self {
+        Self {
+            timeout_secs: 45,
+            max_retries: 2,
+            degraded_threshold_ms: 6000,
+            claude_model: "claude-haiku-4-5-20251001".to_string(),
+            codex_model: "gpt-5.1-codex@low".to_string(),
+            gemini_model: "gemini-3-pro-preview".to_string(),
+        }
+    }
+}
+
+/// 流式检查结果
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct StreamCheckResult {
+    pub status: HealthStatus,
+    pub success: bool,
+    pub message: String,
+    pub response_time_ms: Option<u64>,
+    pub http_status: Option<u16>,
+    pub model_used: String,
+    pub tested_at: i64,
+    pub retry_count: u32,
+}
+
+/// 流式健康检查服务
+pub struct StreamCheckService;
+
+impl StreamCheckService {
+    /// 执行流式健康检查（带重试）
+    pub async fn check_with_retry(
+        app_type: &AppType,
+        provider: &Provider,
+        config: &StreamCheckConfig,
+    ) -> Result<StreamCheckResult, AppError> {
+        let mut last_result = None;
+
+        for attempt in 0..=config.max_retries {
+            let result = Self::check_once(app_type, provider, config).await;
+
+            match &result {
+                Ok(r) if r.success => {
+                    return Ok(StreamCheckResult {
+                        retry_count: attempt,
+                        ..r.clone()
+                    });
+                }
+                Ok(r) => {
+                    // 失败但非异常，判断是否重试
+                    if Self::should_retry(&r.message) && attempt < config.max_retries {
+                        last_result = Some(r.clone());
+                        continue;
+                    }
+                    return Ok(StreamCheckResult {
+                        retry_count: attempt,
+                        ..r.clone()
+                    });
+                }
+                Err(e) => {
+                    if Self::should_retry(&e.to_string()) && attempt < config.max_retries {
+                        continue;
+                    }
+                    return Err(AppError::Message(e.to_string()));
+                }
+            }
+        }
+
+        Ok(last_result.unwrap_or_else(|| StreamCheckResult {
+            status: HealthStatus::Failed,
+            success: false,
+            message: "检查失败".to_string(),
+            response_time_ms: None,
+            http_status: None,
+            model_used: String::new(),
+            tested_at: chrono::Utc::now().timestamp(),
+            retry_count: config.max_retries,
+        }))
+    }
+
+    /// 单次流式检查
+    async fn check_once(
+        app_type: &AppType,
+        provider: &Provider,
+        config: &StreamCheckConfig,
+    ) -> Result<StreamCheckResult, AppError> {
+        let start = Instant::now();
+        let adapter = get_adapter(app_type);
+
+        let base_url = adapter
+            .extract_base_url(provider)
+            .map_err(|e| AppError::Message(format!("提取 base_url 失败: {e}")))?;
+
+        let auth = adapter
+            .extract_auth(provider)
+            .ok_or_else(|| AppError::Message("未找到 API Key".to_string()))?;
+
+        let client = Client::builder()
+            .timeout(Duration::from_secs(config.timeout_secs))
+            .user_agent("cc-switch/1.0")
+            .build()
+            .map_err(|e| AppError::Message(format!("创建客户端失败: {e}")))?;
+
+        let result = match app_type {
+            AppType::Claude => {
+                Self::check_claude_stream(&client, &base_url, &auth, &config.claude_model).await
+            }
+            AppType::Codex => {
+                Self::check_codex_stream(&client, &base_url, &auth, &config.codex_model).await
+            }
+            AppType::Gemini => {
+                Self::check_gemini_stream(&client, &base_url, &auth, &config.gemini_model).await
+            }
+        };
+
+        let response_time = start.elapsed().as_millis() as u64;
+        let tested_at = chrono::Utc::now().timestamp();
+
+        match result {
+            Ok((status_code, model)) => {
+                let health_status =
+                    Self::determine_status(response_time, config.degraded_threshold_ms);
+                Ok(StreamCheckResult {
+                    status: health_status,
+                    success: true,
+                    message: "检查成功".to_string(),
+                    response_time_ms: Some(response_time),
+                    http_status: Some(status_code),
+                    model_used: model,
+                    tested_at,
+                    retry_count: 0,
+                })
+            }
+            Err(e) => Ok(StreamCheckResult {
+                status: HealthStatus::Failed,
+                success: false,
+                message: e.to_string(),
+                response_time_ms: Some(response_time),
+                http_status: None,
+                model_used: String::new(),
+                tested_at,
+                retry_count: 0,
+            }),
+        }
+    }
+
+    /// Claude 流式检查
+    async fn check_claude_stream(
+        client: &Client,
+        base_url: &str,
+        auth: &AuthInfo,
+        model: &str,
+    ) -> Result<(u16, String), AppError> {
+        let base = base_url.trim_end_matches('/');
+        let url = if base.ends_with("/v1") {
+            format!("{base}/messages")
+        } else {
+            format!("{base}/v1/messages")
+        };
+
+        let body = json!({
+            "model": model,
+            "max_tokens": 1,
+            "messages": [{ "role": "user", "content": "hi" }],
+            "stream": true
+        });
+
+        let response = client
+            .post(&url)
+            .header("x-api-key", &auth.api_key)
+            .header("anthropic-version", "2023-06-01")
+            .header("Content-Type", "application/json")
+            .json(&body)
+            .send()
+            .await
+            .map_err(Self::map_request_error)?;
+
+        let status = response.status().as_u16();
+
+        if !response.status().is_success() {
+            let error_text = response.text().await.unwrap_or_default();
+            return Err(AppError::Message(format!("HTTP {status}: {error_text}")));
+        }
+
+        // 流式读取：只需首个 chunk
+        let mut stream = response.bytes_stream();
+        if let Some(chunk) = stream.next().await {
+            match chunk {
+                Ok(_) => Ok((status, model.to_string())),
+                Err(e) => Err(AppError::Message(format!("读取流失败: {e}"))),
+            }
+        } else {
+            Err(AppError::Message("未收到响应数据".to_string()))
+        }
+    }
+
+    /// Codex 流式检查
+    async fn check_codex_stream(
+        client: &Client,
+        base_url: &str,
+        auth: &AuthInfo,
+        model: &str,
+    ) -> Result<(u16, String), AppError> {
+        let base = base_url.trim_end_matches('/');
+        let url = if base.ends_with("/v1") {
+            format!("{base}/chat/completions")
+        } else {
+            format!("{base}/v1/chat/completions")
+        };
+
+        // 解析模型名和推理等级 (支持 model@level 或 model#level 格式)
+        let (actual_model, reasoning_effort) = Self::parse_model_with_effort(model);
+
+        let mut body = json!({
+            "model": actual_model,
+            "messages": [
+                { "role": "system", "content": "" },
+                { "role": "assistant", "content": "" },
+                { "role": "user", "content": "hi" }
+            ],
+            "max_tokens": 1,
+            "temperature": 0,
+            "stream": true
+        });
+
+        // 如果是推理模型，添加 reasoning_effort
+        if let Some(effort) = reasoning_effort {
+            body["reasoning_effort"] = json!(effort);
+        }
+
+        let response = client
+            .post(&url)
+            .header("Authorization", format!("Bearer {}", auth.api_key))
+            .header("Content-Type", "application/json")
+            .json(&body)
+            .send()
+            .await
+            .map_err(Self::map_request_error)?;
+
+        let status = response.status().as_u16();
+
+        if !response.status().is_success() {
+            let error_text = response.text().await.unwrap_or_default();
+            return Err(AppError::Message(format!("HTTP {status}: {error_text}")));
+        }
+
+        let mut stream = response.bytes_stream();
+        if let Some(chunk) = stream.next().await {
+            match chunk {
+                Ok(_) => Ok((status, model.to_string())),
+                Err(e) => Err(AppError::Message(format!("读取流失败: {e}"))),
+            }
+        } else {
+            Err(AppError::Message("未收到响应数据".to_string()))
+        }
+    }
+
+    /// Gemini 流式检查
+    async fn check_gemini_stream(
+        client: &Client,
+        base_url: &str,
+        auth: &AuthInfo,
+        model: &str,
+    ) -> Result<(u16, String), AppError> {
+        let base = base_url.trim_end_matches('/');
+        let url = format!("{base}/v1/chat/completions");
+
+        let body = json!({
+            "model": model,
+            "messages": [{ "role": "user", "content": "hi" }],
+            "max_tokens": 1,
+            "temperature": 0,
+            "stream": true
+        });
+
+        let response = client
+            .post(&url)
+            .header("Authorization", format!("Bearer {}", auth.api_key))
+            .header("Content-Type", "application/json")
+            .json(&body)
+            .send()
+            .await
+            .map_err(Self::map_request_error)?;
+
+        let status = response.status().as_u16();
+
+        if !response.status().is_success() {
+            let error_text = response.text().await.unwrap_or_default();
+            return Err(AppError::Message(format!("HTTP {status}: {error_text}")));
+        }
+
+        let mut stream = response.bytes_stream();
+        if let Some(chunk) = stream.next().await {
+            match chunk {
+                Ok(_) => Ok((status, model.to_string())),
+                Err(e) => Err(AppError::Message(format!("读取流失败: {e}"))),
+            }
+        } else {
+            Err(AppError::Message("未收到响应数据".to_string()))
+        }
+    }
+
+    fn determine_status(latency_ms: u64, threshold: u64) -> HealthStatus {
+        if latency_ms <= threshold {
+            HealthStatus::Operational
+        } else {
+            HealthStatus::Degraded
+        }
+    }
+
+    /// 解析模型名和推理等级 (支持 model@level 或 model#level 格式)
+    /// 返回 (实际模型名, Option<推理等级>)
+    fn parse_model_with_effort(model: &str) -> (String, Option<String>) {
+        // 查找 @ 或 # 分隔符
+        if let Some(pos) = model.find('@').or_else(|| model.find('#')) {
+            let actual_model = model[..pos].to_string();
+            let effort = model[pos + 1..].to_string();
+            if !effort.is_empty() {
+                return (actual_model, Some(effort));
+            }
+        }
+        (model.to_string(), None)
+    }
+
+    fn should_retry(msg: &str) -> bool {
+        let lower = msg.to_lowercase();
+        lower.contains("timeout")
+            || lower.contains("abort")
+            || lower.contains("中断")
+            || lower.contains("超时")
+    }
+
+    fn map_request_error(e: reqwest::Error) -> AppError {
+        if e.is_timeout() {
+            AppError::Message("请求超时".to_string())
+        } else if e.is_connect() {
+            AppError::Message(format!("连接失败: {e}"))
+        } else {
+            AppError::Message(e.to_string())
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_determine_status() {
+        assert_eq!(
+            StreamCheckService::determine_status(3000, 6000),
+            HealthStatus::Operational
+        );
+        assert_eq!(
+            StreamCheckService::determine_status(6000, 6000),
+            HealthStatus::Operational
+        );
+        assert_eq!(
+            StreamCheckService::determine_status(6001, 6000),
+            HealthStatus::Degraded
+        );
+    }
+
+    #[test]
+    fn test_should_retry() {
+        assert!(StreamCheckService::should_retry("请求超时"));
+        assert!(StreamCheckService::should_retry("request timeout"));
+        assert!(!StreamCheckService::should_retry("API Key 无效"));
+    }
+
+    #[test]
+    fn test_default_config() {
+        let config = StreamCheckConfig::default();
+        assert_eq!(config.timeout_secs, 45);
+        assert_eq!(config.max_retries, 2);
+        assert_eq!(config.degraded_threshold_ms, 6000);
+    }
+
+    #[test]
+    fn test_parse_model_with_effort() {
+        // 带 @ 分隔符
+        let (model, effort) = StreamCheckService::parse_model_with_effort("gpt-5.1-codex@low");
+        assert_eq!(model, "gpt-5.1-codex");
+        assert_eq!(effort, Some("low".to_string()));
+
+        // 带 # 分隔符
+        let (model, effort) = StreamCheckService::parse_model_with_effort("o1-preview#high");
+        assert_eq!(model, "o1-preview");
+        assert_eq!(effort, Some("high".to_string()));
+
+        // 无分隔符
+        let (model, effort) = StreamCheckService::parse_model_with_effort("gpt-4o-mini");
+        assert_eq!(model, "gpt-4o-mini");
+        assert_eq!(effort, None);
+    }
+}
@@ -652,56 +652,6 @@ impl Database {
            monthly_exceeded,
        })
    }
-
-    /// 更新每日统计聚合
-    ///
-    /// 在请求完成后调用，更新 usage_daily_stats 表
-    #[allow(clippy::too_many_arguments)]
-    pub fn update_daily_stats(
-        &self,
-        provider_id: &str,
-        app_type: &str,
-        model: &str,
-        input_tokens: u32,
-        output_tokens: u32,
-        total_cost: &str,
-        is_success: bool,
-    ) -> Result<(), AppError> {
-        let conn = lock_conn!(self.conn);
-        let date = Utc::now().format("%Y-%m-%d").to_string();
-
-        // 使用 UPSERT 更新或插入统计
-        conn.execute(
-            "INSERT INTO usage_daily_stats (
-                date, provider_id, app_type, model,
-                request_count, total_input_tokens, total_output_tokens,
-                total_cost_usd, success_count, error_count
-            ) VALUES (?1, ?2, ?3, ?4, 1, ?5, ?6, ?7, ?8, ?9)
-            ON CONFLICT(date, provider_id, app_type, model) DO UPDATE SET
-                request_count = request_count + 1,
-                total_input_tokens = total_input_tokens + ?5,
-                total_output_tokens = total_output_tokens + ?6,
-                total_cost_usd = CAST(
-                    CAST(total_cost_usd AS REAL) + CAST(?7 AS REAL) AS TEXT
-                ),
-                success_count = success_count + ?8,
-                error_count = error_count + ?9",
-            params![
-                date,
-                provider_id,
-                app_type,
-                model,
-                input_tokens,
-                output_tokens,
-                total_cost,
-                if is_success { 1 } else { 0 },
-                if is_success { 0 } else { 1 },
-            ],
-        )
-        .map_err(|e| AppError::Database(format!("更新每日统计失败: {e}")))?;
-
-        Ok(())
-    }
 }

 /// Provider 限额状态
@@ -525,23 +525,18 @@ fn validate_request_url(request_url: &str, base_url: &str) -> Result<(), AppErro

    // 检查端口是否匹配（考虑默认端口）
    // 使用 port_or_known_default() 会自动处理默认端口（http->80, https->443）
-    match (parsed_request.port_or_known_default(), parsed_base.port_or_known_default()) {
+    match (
+        parsed_request.port_or_known_default(),
+        parsed_base.port_or_known_default(),
+    ) {
        (Some(request_port), Some(base_port)) if request_port == base_port => {
            // 端口匹配，继续执行
        }
        (Some(request_port), Some(base_port)) => {
            return Err(AppError::localized(
                "usage_script.request_port_mismatch",
-                format!(
-                    "请求端口 {} 必须与 base_url 端口 {} 匹配",
-                    request_port,
-                    base_port
-                ),
-                format!(
-                    "Request port {} must match base_url port {}",
-                    request_port,
-                    base_port
-                ),
+                format!("请求端口 {request_port} 必须与 base_url 端口 {base_port} 匹配"),
+                format!("Request port {request_port} must match base_url port {base_port}"),
            ));
        }
        _ => {
@@ -774,22 +769,25 @@ mod tests {
    fn test_https_bypass_prevention() {
        // 非本地域名的 HTTP 应该被拒绝
        let result = validate_base_url("http://127.0.0.1.evil.com/api");
-        assert!(result.is_err(), "Should reject HTTP for non-localhost domains");
+        assert!(
+            result.is_err(),
+            "Should reject HTTP for non-localhost domains"
+        );
    }

    #[test]
    fn test_edge_cases() {
        // 边界情况测试
-        assert!(is_private_ip("172.16.0.0"));   // RFC1918起始
+        assert!(is_private_ip("172.16.0.0")); // RFC1918起始
        assert!(is_private_ip("172.31.255.255")); // RFC1918结束
-        assert!(is_private_ip("10.0.0.0"));      // 10.0.0.0/8起始
+        assert!(is_private_ip("10.0.0.0")); // 10.0.0.0/8起始
        assert!(is_private_ip("10.255.255.255")); // 10.0.0.0/8结束
-        assert!(is_private_ip("192.168.0.0"));   // 192.168.0.0/16起始
+        assert!(is_private_ip("192.168.0.0")); // 192.168.0.0/16起始
        assert!(is_private_ip("192.168.255.255")); // 192.168.0.0/16结束

        // 紧邻RFC1918的公网地址 - 应该返回false
        assert!(!is_private_ip("172.15.255.255")); // 172.16.0.0的前一个
-        assert!(!is_private_ip("172.32.0.0"));    // 172.31.255.255的后一个
+        assert!(!is_private_ip("172.32.0.0")); // 172.31.255.255的后一个
    }

    #[test]
@@ -815,27 +813,57 @@ mod tests {
        // 测试用例：(base_url, request_url, should_match)
        let test_cases = vec![
            // HTTPS默认端口测试
-            ("https://api.example.com", "https://api.example.com/v1/test", true),
-            ("https://api.example.com", "https://api.example.com:443/v1/test", true),
-            ("https://api.example.com:443", "https://api.example.com/v1/test", true),
-            ("https://api.example.com:443", "https://api.example.com:443/v1/test", true),
-
+            (
+                "https://api.example.com",
+                "https://api.example.com/v1/test",
+                true,
+            ),
+            (
+                "https://api.example.com",
+                "https://api.example.com:443/v1/test",
+                true,
+            ),
+            (
+                "https://api.example.com:443",
+                "https://api.example.com/v1/test",
+                true,
+            ),
+            (
+                "https://api.example.com:443",
+                "https://api.example.com:443/v1/test",
+                true,
+            ),
            // 端口不匹配测试
-            ("https://api.example.com", "https://api.example.com:8443/v1/test", false),
-            ("https://api.example.com:443", "https://api.example.com:8443/v1/test", false),
+            (
+                "https://api.example.com",
+                "https://api.example.com:8443/v1/test",
+                false,
+            ),
+            (
+                "https://api.example.com:443",
+                "https://api.example.com:8443/v1/test",
+                false,
+            ),
        ];

        for (base_url, request_url, should_match) in test_cases {
            let result = validate_request_url(request_url, base_url);

            if should_match {
-                assert!(result.is_ok(),
+                assert!(
+                    result.is_ok(),
                    "应该匹配的URL被拒绝: base_url={}, request_url={}, error={}",
-                    base_url, request_url, result.unwrap_err());
+                    base_url,
+                    request_url,
+                    result.unwrap_err()
+                );
            } else {
-                assert!(result.is_err(),
+                assert!(
+                    result.is_err(),
                    "应该不匹配的URL被允许: base_url={}, request_url={}",
-                    base_url, request_url);
+                    base_url,
+                    request_url
+                );
            }
        }
    }
@@ -1,7 +1,7 @@
 {
  "$schema": "https://schema.tauri.app/config/2",
  "productName": "CC Switch",
-  "version": "3.8.2",
+  "version": "3.9.0-1",
  "identifier": "com.ccswitch.desktop",
  "build": {
    "frontendDist": "../dist",
@@ -1,6 +1,8 @@
 use std::sync::Arc;

-use cc_switch_lib::{import_provider_from_deeplink, parse_deeplink_url, AppState, Database};
+use cc_switch_lib::{
+    import_provider_from_deeplink, parse_deeplink_url, AppState, Database, ProxyService,
+};

 #[path = "support.rs"]
 mod support;
@@ -16,8 +18,11 @@ fn deeplink_import_claude_provider_persists_to_db() {
    let request = parse_deeplink_url(url).expect("parse deeplink url");

    let db = Arc::new(Database::memory().expect("create memory db"));
-
-    let state = AppState { db: db.clone() };
+    let proxy_service = ProxyService::new(db.clone());
+    let state = AppState {
+        db: db.clone(),
+        proxy_service,
+    };

    let provider_id = import_provider_from_deeplink(&state, request.clone())
        .expect("import provider from deeplink");
@@ -53,8 +58,11 @@ fn deeplink_import_codex_provider_builds_auth_and_config() {
    let request = parse_deeplink_url(url).expect("parse deeplink url");

    let db = Arc::new(Database::memory().expect("create memory db"));
-
-    let state = AppState { db: db.clone() };
+    let proxy_service = ProxyService::new(db.clone());
+    let state = AppState {
+        db: db.clone(),
+        proxy_service,
+    };

    let provider_id = import_provider_from_deeplink(&state, request.clone())
        .expect("import provider from deeplink");
@@ -154,6 +154,12 @@ fn sync_enabled_to_codex_writes_enabled_servers() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();

+    // 模拟 Codex 已安装/已初始化：存在 ~/.codex 目录
+    let path = cc_switch_lib::get_codex_config_path();
+    if let Some(parent) = path.parent() {
+        fs::create_dir_all(parent).expect("create codex dir");
+    }
+
    let mut config = MultiAppConfig::default();
    config.mcp.codex.servers.insert(
        "stdio-enabled".into(),
@@ -170,7 +176,6 @@ fn sync_enabled_to_codex_writes_enabled_servers() {

    cc_switch_lib::sync_enabled_to_codex(&config).expect("sync codex");

-    let path = cc_switch_lib::get_codex_config_path();
    assert!(path.exists(), "config.toml should be created");
    let text = fs::read_to_string(&path).expect("read config.toml");
    assert!(
@@ -594,6 +599,11 @@ command = "echo"
 fn sync_claude_enabled_mcp_projects_to_user_config() {
    let _guard = test_mutex().lock().expect("acquire test mutex");
    reset_test_fs();
+    let home = ensure_test_home();
+
+    // 模拟 Claude 已安装/已初始化：存在 ~/.claude 目录
+    fs::create_dir_all(home.join(".claude")).expect("create claude dir");
+
    let mut config = MultiAppConfig::default();

    config.mcp.claude.servers.insert(
@@ -246,3 +246,311 @@ fn set_mcp_enabled_for_codex_writes_live_config() {
        "codex config should include the enabled server definition"
    );
 }
+
+#[test]
+fn enabling_codex_mcp_skips_when_codex_dir_missing() {
+    use support::create_test_state;
+
+    let _guard = test_mutex().lock().expect("acquire test mutex");
+    reset_test_fs();
+    let home = ensure_test_home();
+
+    // 确认 Codex 配置目录不存在（模拟“未安装/未运行过 Codex CLI”）
+    assert!(
+        !home.join(".codex").exists(),
+        "~/.codex should not exist in fresh test environment"
+    );
+
+    let state = create_test_state().expect("create test state");
+
+    // 先插入一个未启用 Codex 的 MCP 服务器（避免 upsert 触发同步）
+    McpService::upsert_server(
+        &state,
+        McpServer {
+            id: "codex-server".to_string(),
+            name: "Codex Server".to_string(),
+            server: json!({
+                "type": "stdio",
+                "command": "echo"
+            }),
+            apps: McpApps {
+                claude: false,
+                codex: false,
+                gemini: false,
+            },
+            description: None,
+            homepage: None,
+            docs: None,
+            tags: Vec::new(),
+        },
+    )
+    .expect("insert server without syncing");
+
+    // 启用 Codex：目录缺失时应跳过写入（不创建 ~/.codex/config.toml）
+    McpService::toggle_app(&state, "codex-server", AppType::Codex, true)
+        .expect("toggle codex should succeed even when ~/.codex is missing");
+
+    assert!(
+        !home.join(".codex").exists(),
+        "~/.codex should still not exist after skipped sync"
+    );
+}
+
+#[test]
+fn upsert_mcp_server_disabling_app_removes_from_claude_live_config() {
+    let _guard = test_mutex().lock().expect("acquire test mutex");
+    reset_test_fs();
+    let home = ensure_test_home();
+
+    // 模拟 Claude 已安装/已初始化：存在 ~/.claude 目录
+    fs::create_dir_all(home.join(".claude")).expect("create ~/.claude dir");
+
+    // 先创建一个启用 Claude 的 MCP 服务器
+    let state = support::create_test_state().expect("create test state");
+    McpService::upsert_server(
+        &state,
+        McpServer {
+            id: "echo".to_string(),
+            name: "echo".to_string(),
+            server: json!({
+                "type": "stdio",
+                "command": "echo"
+            }),
+            apps: McpApps {
+                claude: true,
+                codex: false,
+                gemini: false,
+            },
+            description: None,
+            homepage: None,
+            docs: None,
+            tags: Vec::new(),
+        },
+    )
+    .expect("upsert should sync to Claude live config");
+
+    // 确认已写入 ~/.claude.json
+    let mcp_path = get_claude_mcp_path();
+    let text = fs::read_to_string(&mcp_path).expect("read ~/.claude.json");
+    let v: serde_json::Value = serde_json::from_str(&text).expect("parse ~/.claude.json");
+    assert!(
+        v.pointer("/mcpServers/echo").is_some(),
+        "echo should exist in Claude live config after enabling"
+    );
+
+    // 再次 upsert：取消勾选 Claude（apps.claude=false），应从 Claude live 配置中移除
+    McpService::upsert_server(
+        &state,
+        McpServer {
+            id: "echo".to_string(),
+            name: "echo".to_string(),
+            server: json!({
+                "type": "stdio",
+                "command": "echo"
+            }),
+            apps: McpApps {
+                claude: false,
+                codex: false,
+                gemini: false,
+            },
+            description: None,
+            homepage: None,
+            docs: None,
+            tags: Vec::new(),
+        },
+    )
+    .expect("upsert disabling app should remove from Claude live config");
+
+    let text = fs::read_to_string(&mcp_path).expect("read ~/.claude.json after disable");
+    let v: serde_json::Value = serde_json::from_str(&text).expect("parse ~/.claude.json");
+    assert!(
+        v.pointer("/mcpServers/echo").is_none(),
+        "echo should be removed from Claude live config after disabling"
+    );
+}
+
+#[test]
+fn import_mcp_from_multiple_apps_merges_enabled_flags() {
+    let _guard = test_mutex().lock().expect("acquire test mutex");
+    reset_test_fs();
+    let home = ensure_test_home();
+
+    // 1) Claude: ~/.claude.json
+    let mcp_path = get_claude_mcp_path();
+    let claude_json = json!({
+        "mcpServers": {
+            "shared": {
+                "type": "stdio",
+                "command": "echo"
+            }
+        }
+    });
+    fs::write(
+        &mcp_path,
+        serde_json::to_string_pretty(&claude_json).expect("serialize claude mcp"),
+    )
+    .expect("seed ~/.claude.json");
+
+    // 2) Codex: ~/.codex/config.toml
+    let codex_dir = home.join(".codex");
+    fs::create_dir_all(&codex_dir).expect("create codex dir");
+    fs::write(
+        codex_dir.join("config.toml"),
+        r#"[mcp_servers.shared]
+type = "stdio"
+command = "echo"
+"#,
+    )
+    .expect("seed ~/.codex/config.toml");
+
+    let state = support::create_test_state().expect("create test state");
+
+    McpService::import_from_claude(&state).expect("import from claude");
+    McpService::import_from_codex(&state).expect("import from codex");
+
+    let servers = state.db.get_all_mcp_servers().expect("get all mcp servers");
+    let entry = servers.get("shared").expect("shared server exists");
+    assert!(entry.apps.claude, "shared should enable Claude");
+    assert!(entry.apps.codex, "shared should enable Codex");
+}
+
+#[test]
+fn import_mcp_from_gemini_sse_url_only_is_valid() {
+    let _guard = test_mutex().lock().expect("acquire test mutex");
+    reset_test_fs();
+    let home = ensure_test_home();
+
+    // Gemini MCP 位于 ~/.gemini/settings.json
+    let gemini_dir = home.join(".gemini");
+    fs::create_dir_all(&gemini_dir).expect("create gemini dir");
+    let settings_path = gemini_dir.join("settings.json");
+
+    // Gemini SSE：只包含 url（Gemini 不使用 type 字段）
+    let gemini_settings = json!({
+        "mcpServers": {
+            "sse-server": {
+                "url": "https://example.com/sse"
+            }
+        }
+    });
+    fs::write(
+        &settings_path,
+        serde_json::to_string_pretty(&gemini_settings).expect("serialize gemini settings"),
+    )
+    .expect("seed ~/.gemini/settings.json");
+
+    let state = support::create_test_state().expect("create test state");
+    let changed = McpService::import_from_gemini(&state).expect("import from gemini");
+    assert!(changed > 0, "should import at least 1 server");
+
+    let servers = state.db.get_all_mcp_servers().expect("get all mcp servers");
+    let entry = servers.get("sse-server").expect("sse-server exists");
+    assert!(entry.apps.gemini, "imported server should enable Gemini");
+    assert_eq!(
+        entry.server.get("type").and_then(|v| v.as_str()),
+        Some("sse"),
+        "Gemini url-only server should be normalized to type=sse in unified structure"
+    );
+}
+
+#[test]
+fn enabling_gemini_mcp_skips_when_gemini_dir_missing() {
+    use support::create_test_state;
+
+    let _guard = test_mutex().lock().expect("acquire test mutex");
+    reset_test_fs();
+    let home = ensure_test_home();
+
+    // 确认 Gemini 配置目录不存在（模拟“未安装/未运行过 Gemini CLI”）
+    assert!(
+        !home.join(".gemini").exists(),
+        "~/.gemini should not exist in fresh test environment"
+    );
+
+    let state = create_test_state().expect("create test state");
+
+    // 先插入一个未启用 Gemini 的 MCP 服务器（避免 upsert 触发同步）
+    McpService::upsert_server(
+        &state,
+        McpServer {
+            id: "gemini-server".to_string(),
+            name: "Gemini Server".to_string(),
+            server: json!({
+                "type": "sse",
+                "url": "https://example.com/sse"
+            }),
+            apps: McpApps {
+                claude: false,
+                codex: false,
+                gemini: false,
+            },
+            description: None,
+            homepage: None,
+            docs: None,
+            tags: Vec::new(),
+        },
+    )
+    .expect("insert server without syncing");
+
+    // 启用 Gemini：目录缺失时应跳过写入（不创建 ~/.gemini/settings.json）
+    McpService::toggle_app(&state, "gemini-server", AppType::Gemini, true)
+        .expect("toggle gemini should succeed even when ~/.gemini is missing");
+
+    assert!(
+        !home.join(".gemini").exists(),
+        "~/.gemini should still not exist after skipped sync"
+    );
+}
+
+#[test]
+fn enabling_claude_mcp_skips_when_claude_config_absent() {
+    use support::create_test_state;
+
+    let _guard = test_mutex().lock().expect("acquire test mutex");
+    reset_test_fs();
+    let home = ensure_test_home();
+
+    // 确认 Claude 相关目录/文件都不存在（模拟“未安装/未运行过 Claude”）
+    assert!(
+        !home.join(".claude").exists(),
+        "~/.claude should not exist in fresh test environment"
+    );
+    assert!(
+        !home.join(".claude.json").exists(),
+        "~/.claude.json should not exist in fresh test environment"
+    );
+
+    let state = create_test_state().expect("create test state");
+
+    // 先插入一个未启用 Claude 的 MCP 服务器（避免 upsert 触发同步）
+    McpService::upsert_server(
+        &state,
+        McpServer {
+            id: "claude-server".to_string(),
+            name: "Claude Server".to_string(),
+            server: json!({
+                "type": "stdio",
+                "command": "echo"
+            }),
+            apps: McpApps {
+                claude: false,
+                codex: false,
+                gemini: false,
+            },
+            description: None,
+            homepage: None,
+            docs: None,
+            tags: Vec::new(),
+        },
+    )
+    .expect("insert server without syncing");
+
+    // 启用 Claude：配置缺失时应跳过写入（不创建 ~/.claude.json）
+    McpService::toggle_app(&state, "claude-server", AppType::Claude, true)
+        .expect("toggle claude should succeed even when ~/.claude is missing");
+
+    assert!(
+        !home.join(".claude.json").exists(),
+        "~/.claude.json should still not exist after skipped sync"
+    );
+}
@@ -1,7 +1,9 @@
 use std::path::{Path, PathBuf};
 use std::sync::{Arc, Mutex, OnceLock};

-use cc_switch_lib::{update_settings, AppSettings, AppState, Database, MultiAppConfig};
+use cc_switch_lib::{
+    update_settings, AppSettings, AppState, Database, MultiAppConfig, ProxyService,
+};

 /// 为测试设置隔离的 HOME 目录，避免污染真实用户数据。
 pub fn ensure_test_home() -> &'static Path {
@@ -48,15 +50,17 @@ pub fn test_mutex() -> &'static Mutex<()> {

 /// 创建测试用的 AppState，包含一个空的数据库
 pub fn create_test_state() -> Result<AppState, Box<dyn std::error::Error>> {
-    let db = Database::init()?;
-    Ok(AppState { db: Arc::new(db) })
+    let db = Arc::new(Database::init()?);
+    let proxy_service = ProxyService::new(db.clone());
+    Ok(AppState { db, proxy_service })
 }

 /// 创建测试用的 AppState，并从 MultiAppConfig 迁移数据
 pub fn create_test_state_with_config(
    config: &MultiAppConfig,
 ) -> Result<AppState, Box<dyn std::error::Error>> {
-    let db = Database::init()?;
+    let db = Arc::new(Database::init()?);
    db.migrate_from_json(config)?;
-    Ok(AppState { db: Arc::new(db) })
+    let proxy_service = ProxyService::new(db.clone());
+    Ok(AppState { db, proxy_service })
 }
@@ -25,6 +25,7 @@ import { checkAllEnvConflicts, checkEnvConflicts } from "@/lib/api/env";
 import { useProviderActions } from "@/hooks/useProviderActions";
 import { useProxyStatus } from "@/hooks/useProxyStatus";
 import { extractErrorMessage } from "@/utils/errorUtils";
+import { cn } from "@/lib/utils";
 import { AppSwitcher } from "@/components/AppSwitcher";
 import { ProviderList } from "@/components/providers/ProviderList";
 import { AddProviderDialog } from "@/components/providers/AddProviderDialog";
@@ -33,6 +34,7 @@ import { ConfirmDialog } from "@/components/ConfirmDialog";
 import { SettingsPage } from "@/components/settings/SettingsPage";
 import { UpdateBadge } from "@/components/UpdateBadge";
 import { EnvWarningBanner } from "@/components/env/EnvWarningBanner";
+import { ProxyToggle } from "@/components/proxy/ProxyToggle";
 import UsageScriptModal from "@/components/UsageScriptModal";
 import UnifiedMcpPanel from "@/components/mcp/UnifiedMcpPanel";
 import PromptPanel from "@/components/prompts/PromptPanel";
@@ -63,7 +65,15 @@ function App() {
    "bg-orange-500 hover:bg-orange-600 dark:bg-orange-500 dark:hover:bg-orange-600 text-white shadow-lg shadow-orange-500/30 dark:shadow-orange-500/40 rounded-full w-8 h-8";

  // 获取代理服务状态
-  const { isRunning: isProxyRunning } = useProxyStatus();
+  const { isRunning: isProxyRunning, takeoverStatus } = useProxyStatus();
+  // 当前应用的代理是否开启
+  const isCurrentAppTakeoverActive = takeoverStatus?.[activeApp] || false;
+  // 任意应用的代理是否开启
+  const isTakeoverActive =
+    takeoverStatus?.claude ||
+    takeoverStatus?.codex ||
+    takeoverStatus?.gemini ||
+    false;

  // 获取供应商列表，当代理服务运行时自动刷新
  const { data, isLoading, refetch } = useProvidersQuery(activeApp, {
@@ -140,6 +150,7 @@ function App() {
        if (migrated) {
          toast.success(
            t("migration.success", { defaultValue: "配置迁移成功" }),
+            { closeButton: true },
          );
        }
      } catch (error) {
@@ -321,6 +332,7 @@ function App() {
                  appId={activeApp}
                  isLoading={isLoading}
                  isProxyRunning={isProxyRunning}
+                  isProxyTakeover={isProxyRunning && isCurrentAppTakeoverActive}
                  onSwitch={switchProvider}
                  onEdit={setEditingProvider}
                  onDelete={setConfirmDelete}
@@ -415,7 +427,12 @@ function App() {
                    href="https://github.com/farion1231/cc-switch"
                    target="_blank"
                    rel="noreferrer"
-                    className="text-xl font-semibold text-blue-500 transition-colors hover:text-blue-600 dark:text-blue-400 dark:hover:text-blue-300"
+                    className={cn(
+                      "text-xl font-semibold transition-colors",
+                      isProxyRunning && isCurrentAppTakeoverActive
+                        ? "text-emerald-500 hover:text-emerald-600 dark:text-emerald-400 dark:hover:text-emerald-300"
+                        : "text-blue-500 hover:text-blue-600 dark:text-blue-400 dark:hover:text-blue-300",
+                    )}
                  >
                    CC Switch
                  </a>
@@ -482,20 +499,26 @@ function App() {
            )}
            {currentView === "providers" && (
              <>
+                <ProxyToggle activeApp={activeApp} />
+
                <AppSwitcher activeApp={activeApp} onSwitch={setActiveApp} />

                <div className="bg-muted p-1 rounded-xl flex items-center gap-1">
-                  {hasSkillsSupport && (
-                    <Button
-                      variant="ghost"
-                      size="sm"
-                      onClick={() => setCurrentView("skills")}
-                      className="text-muted-foreground hover:text-foreground hover:bg-black/5 dark:hover:bg-white/5"
-                      title={t("skills.manage")}
-                    >
-                      <Wrench className="h-4 w-4" />
-                    </Button>
-                  )}
+                  <Button
+                    variant="ghost"
+                    size="sm"
+                    onClick={() => setCurrentView("skills")}
+                    className={cn(
+                      "text-muted-foreground hover:text-foreground hover:bg-black/5 dark:hover:bg-white/5",
+                      "transition-all duration-200 ease-in-out overflow-hidden",
+                      hasSkillsSupport
+                        ? "opacity-100 w-8 scale-100 px-2"
+                        : "opacity-0 w-0 scale-75 pointer-events-none px-0 -ml-1",
+                    )}
+                    title={t("skills.manage")}
+                  >
+                    <Wrench className="h-4 w-4 flex-shrink-0" />
+                  </Button>
                  {/* TODO: Agents 功能开发中，暂时隐藏入口 */}
                  {/* {isClaudeApp && (
                    <Button
@@ -567,6 +590,7 @@ function App() {
        }}
        onSubmit={handleEditProvider}
        appId={activeApp}
+        isProxyTakeover={isProxyRunning && isTakeoverActive}
      />

      {usageProvider && (
@@ -128,6 +128,7 @@ export function DeepLinkImportDialog() {
            description: t("deeplink.mcpImportSuccessDescription", {
              count: summary.importedCount,
            }),
+            closeButton: true,
          });
        }
      };
@@ -142,6 +143,7 @@ export function DeepLinkImportDialog() {
            description: t("deeplink.importSuccessDescription", {
              name: request.name,
            }),
+            closeButton: true,
          });
        } else if (result.type === "prompt") {
          // Prompts don't use React Query, trigger a custom event for refresh
@@ -154,6 +156,7 @@ export function DeepLinkImportDialog() {
            description: t("deeplink.promptImportSuccessDescription", {
              name: request.name,
            }),
+            closeButton: true,
          });
        } else if (result.type === "mcp") {
          await refreshMcp(result);
@@ -171,6 +174,7 @@ export function DeepLinkImportDialog() {
            description: t("deeplink.skillImportSuccessDescription", {
              repo: request.repo,
            }),
+            closeButton: true,
          });
        }
      } else if (isMcpImportResult(result)) {
@@ -185,6 +189,7 @@ export function DeepLinkImportDialog() {
          description: t("deeplink.importSuccessDescription", {
            name: request.name,
          }),
+          closeButton: true,
        });
      }

@@ -605,6 +610,86 @@ export function DeepLinkImportDialog() {
                    </div>
                  )}

+                  {/* Usage Script Configuration (v3.9+) */}
+                  {request.usageScript && (
+                    <div className="space-y-3 pt-2 border-t border-border-default">
+                      <div className="grid grid-cols-3 items-center gap-4">
+                        <div className="font-medium text-sm text-muted-foreground">
+                          {t("deeplink.usageScript", {
+                            defaultValue: "用量查询",
+                          })}
+                        </div>
+                        <div className="col-span-2 text-sm">
+                          <span
+                            className={`inline-flex items-center px-2 py-0.5 rounded-md text-xs font-medium ${
+                              request.usageEnabled !== false
+                                ? "bg-green-100 dark:bg-green-900/30 text-green-700 dark:text-green-300"
+                                : "bg-gray-100 dark:bg-gray-800 text-gray-600 dark:text-gray-400"
+                            }`}
+                          >
+                            {request.usageEnabled !== false
+                              ? t("deeplink.usageScriptEnabled", {
+                                  defaultValue: "已启用",
+                                })
+                              : t("deeplink.usageScriptDisabled", {
+                                  defaultValue: "未启用",
+                                })}
+                          </span>
+                        </div>
+                      </div>
+
+                      {/* Usage API Key (if different from provider) */}
+                      {request.usageApiKey &&
+                        request.usageApiKey !== request.apiKey && (
+                          <div className="grid grid-cols-3 items-center gap-4">
+                            <div className="font-medium text-sm text-muted-foreground">
+                              {t("deeplink.usageApiKey", {
+                                defaultValue: "用量 API Key",
+                              })}
+                            </div>
+                            <div className="col-span-2 text-sm font-mono text-muted-foreground">
+                              {request.usageApiKey.length > 4
+                                ? `${request.usageApiKey.substring(0, 4)}${"*".repeat(12)}`
+                                : "****"}
+                            </div>
+                          </div>
+                        )}
+
+                      {/* Usage Base URL (if different from provider) */}
+                      {request.usageBaseUrl &&
+                        request.usageBaseUrl !== request.endpoint && (
+                          <div className="grid grid-cols-3 items-center gap-4">
+                            <div className="font-medium text-sm text-muted-foreground">
+                              {t("deeplink.usageBaseUrl", {
+                                defaultValue: "用量查询地址",
+                              })}
+                            </div>
+                            <div className="col-span-2 text-sm break-all">
+                              {request.usageBaseUrl}
+                            </div>
+                          </div>
+                        )}
+
+                      {/* Auto Query Interval */}
+                      {request.usageAutoInterval &&
+                        request.usageAutoInterval > 0 && (
+                          <div className="grid grid-cols-3 items-center gap-4">
+                            <div className="font-medium text-sm text-muted-foreground">
+                              {t("deeplink.usageAutoInterval", {
+                                defaultValue: "自动查询",
+                              })}
+                            </div>
+                            <div className="col-span-2 text-sm">
+                              {t("deeplink.usageAutoIntervalValue", {
+                                defaultValue: "每 {{minutes}} 分钟",
+                                minutes: request.usageAutoInterval,
+                              })}
+                            </div>
+                          </div>
+                        )}
+                    </div>
+                  )}
+
                  {/* Warning */}
                  <div className="rounded-lg bg-yellow-50 dark:bg-yellow-900/20 p-3 text-sm text-yellow-800 dark:text-yellow-200">
                    {t("deeplink.warning")}
@@ -234,7 +234,9 @@ const JsonEditor: React.FC<JsonEditorProps> = ({
    try {
      const formatted = formatJSON(currentValue);
      onChange(formatted);
-      toast.success(t("common.formatSuccess", { defaultValue: "格式化成功" }));
+      toast.success(t("common.formatSuccess", { defaultValue: "格式化成功" }), {
+        closeButton: true,
+      });
    } catch (error) {
      const errorMessage =
        error instanceof Error ? error.message : String(error);
@@ -227,6 +227,7 @@ const UsageScriptModal: React.FC<UsageScriptModalProps> = ({
          .join(", ");
        toast.success(`${t("usageScript.testSuccess")}${summary}`, {
          duration: 3000,
+          closeButton: true,
        });
      } else {
        toast.error(
@@ -259,7 +260,10 @@ const UsageScriptModal: React.FC<UsageScriptModalProps> = ({
        printWidth: 80,
      });
      setScript({ ...script, code: formatted.trim() });
-      toast.success(t("usageScript.formatSuccess"), { duration: 1000 });
+      toast.success(t("usageScript.formatSuccess"), {
+        duration: 1000,
+        closeButton: true,
+      });
    } catch (error: any) {
      toast.error(
        `${t("usageScript.formatFailed")}: ${error?.message || t("jsonEditor.invalidJson")}`,
@@ -400,15 +404,25 @@ const UsageScriptModal: React.FC<UsageScriptModalProps> = ({
            {/* 凭证配置 */}
            {shouldShowCredentialsConfig && (
              <div className="space-y-4">
-                <h4 className="text-sm font-medium text-foreground">
-                  {t("usageScript.credentialsConfig")}
-                </h4>
+                <div className="flex items-start justify-between">
+                  <h4 className="text-sm font-medium text-foreground">
+                    {t("usageScript.credentialsConfig")}
+                  </h4>
+                  <p className="text-xs text-muted-foreground">
+                    {t("usageScript.credentialsHint")}
+                  </p>
+                </div>

                <div className="grid gap-4 md:grid-cols-2">
                  {selectedTemplate === TEMPLATE_KEYS.GENERAL && (
                    <>
                      <div className="space-y-2">
-                        <Label htmlFor="usage-api-key">API Key</Label>
+                        <Label htmlFor="usage-api-key">
+                          API Key{" "}
+                          <span className="text-xs text-muted-foreground font-normal">
+                            ({t("usageScript.optional")})
+                          </span>
+                        </Label>
                        <div className="relative">
                          <Input
                            id="usage-api-key"
@@ -417,7 +431,7 @@ const UsageScriptModal: React.FC<UsageScriptModalProps> = ({
                            onChange={(e) =>
                              setScript({ ...script, apiKey: e.target.value })
                            }
-                            placeholder="sk-xxxxx"
+                            placeholder={t("usageScript.apiKeyPlaceholder")}
                            autoComplete="off"
                            className="border-white/10"
                          />
@@ -444,7 +458,10 @@ const UsageScriptModal: React.FC<UsageScriptModalProps> = ({

                      <div className="space-y-2">
                        <Label htmlFor="usage-base-url">
-                          {t("usageScript.baseUrl")}
+                          {t("usageScript.baseUrl")}{" "}
+                          <span className="text-xs text-muted-foreground font-normal">
+                            ({t("usageScript.optional")})
+                          </span>
                        </Label>
                        <Input
                          id="usage-base-url"
@@ -453,7 +470,7 @@ const UsageScriptModal: React.FC<UsageScriptModalProps> = ({
                          onChange={(e) =>
                            setScript({ ...script, baseUrl: e.target.value })
                          }
-                          placeholder="https://api.example.com"
+                          placeholder={t("usageScript.baseUrlPlaceholder")}
                          autoComplete="off"
                          className="border-white/10"
                        />
@@ -79,6 +79,7 @@ export function EnvWarningBanner({
          path: backupInfo.backupPath,
        }),
        duration: 5000,
+        closeButton: true,
      });

      // 清空选择并通知父组件
@@ -391,7 +391,7 @@ const McpFormModal: React.FC<McpFormModalProps> = ({
      }

      await upsertMutation.mutateAsync(entry);
-      toast.success(t("common.success"));
+      toast.success(t("common.success"), { closeButton: true });
      await onSave();
    } catch (error: any) {
      const detail = extractErrorMessage(error);
@@ -99,7 +99,7 @@ const UnifiedMcpPanel = React.forwardRef<
        try {
          await deleteServerMutation.mutateAsync(id);
          setConfirmDialog(null);
-          toast.success(t("common.success"));
+          toast.success(t("common.success"), { closeButton: true });
        } catch (error) {
          toast.error(t("common.error"), {
            description: String(error),
@@ -16,6 +16,7 @@ interface EditProviderDialogProps {
  onOpenChange: (open: boolean) => void;
  onSubmit: (provider: Provider) => Promise<void> | void;
  appId: AppId;
+  isProxyTakeover?: boolean; // 代理接管模式下不读取 live（避免显示被接管后的代理配置）
 }

 export function EditProviderDialog({
@@ -24,6 +25,7 @@ export function EditProviderDialog({
  onOpenChange,
  onSubmit,
  appId,
+  isProxyTakeover = false,
 }: EditProviderDialogProps) {
  const { t } = useTranslation();

@@ -50,6 +52,16 @@ export function EditProviderDialog({
        return;
      }

+      // 代理接管模式：Live 配置已被代理改写，读取 live 会导致编辑界面展示代理地址/占位符等内容
+      // 因此直接回退到 SSOT（数据库）配置，避免用户困惑与误保存
+      if (isProxyTakeover) {
+        if (!cancelled) {
+          setLiveSettings(null);
+          setHasLoadedLive(true);
+        }
+        return;
+      }
+
      try {
        const currentId = await providersApi.getCurrent(appId);
        if (currentId && provider.id === currentId) {
@@ -82,7 +94,7 @@ export function EditProviderDialog({
    return () => {
      cancelled = true;
    };
-  }, [open, provider?.id, appId, hasLoadedLive]); // 只依赖 provider.id，不依赖整个 provider 对象
+  }, [open, provider?.id, appId, hasLoadedLive, isProxyTakeover]); // 只依赖 provider.id，不依赖整个 provider 对象

  const initialSettingsConfig = useMemo(() => {
    return (liveSettings ?? provider?.settingsConfig ?? {}) as Record<
@@ -0,0 +1,45 @@
+import React from "react";
+import { cn } from "@/lib/utils";
+import type { HealthStatus } from "@/lib/api/model-test";
+
+interface HealthStatusIndicatorProps {
+  status: HealthStatus;
+  responseTimeMs?: number;
+  className?: string;
+}
+
+const statusConfig = {
+  operational: {
+    color: "bg-emerald-500",
+    label: "正常",
+    textColor: "text-emerald-600 dark:text-emerald-400",
+  },
+  degraded: {
+    color: "bg-yellow-500",
+    label: "降级",
+    textColor: "text-yellow-600 dark:text-yellow-400",
+  },
+  failed: {
+    color: "bg-red-500",
+    label: "失败",
+    textColor: "text-red-600 dark:text-red-400",
+  },
+};
+
+export const HealthStatusIndicator: React.FC<HealthStatusIndicatorProps> = ({
+  status,
+  responseTimeMs,
+  className,
+}) => {
+  const config = statusConfig[status];
+
+  return (
+    <div className={cn("flex items-center gap-2", className)}>
+      <div className={cn("w-2 h-2 rounded-full", config.color)} />
+      <span className={cn("text-xs font-medium", config.textColor)}>
+        {config.label}
+        {responseTimeMs !== undefined && ` (${responseTimeMs}ms)`}
+      </span>
+    </div>
+  );
+};
@@ -7,7 +7,6 @@ import {
  Play,
  TestTube2,
  Trash2,
-  RotateCcw,
 } from "lucide-react";
 import { useTranslation } from "react-i18next";
 import { Button } from "@/components/ui/button";
@@ -16,29 +15,25 @@ import { cn } from "@/lib/utils";
 interface ProviderActionsProps {
  isCurrent: boolean;
  isTesting?: boolean;
+  isProxyTakeover?: boolean;
  onSwitch: () => void;
  onEdit: () => void;
  onDuplicate: () => void;
  onTest?: () => void;
  onConfigureUsage: () => void;
  onDelete: () => void;
-  onResetCircuitBreaker?: () => void;
-  isProxyTarget?: boolean;
-  consecutiveFailures?: number;
 }

 export function ProviderActions({
  isCurrent,
  isTesting,
+  isProxyTakeover = false,
  onSwitch,
  onEdit,
  onDuplicate,
  onTest,
  onConfigureUsage,
  onDelete,
-  onResetCircuitBreaker,
-  isProxyTarget,
-  consecutiveFailures = 0,
 }: ProviderActionsProps) {
  const { t } = useTranslation();
  const iconButtonClass = "h-8 w-8 p-1";
@@ -54,6 +49,10 @@ export function ProviderActions({
          "w-[4.5rem] px-2.5",
          isCurrent &&
            "bg-gray-200 text-muted-foreground hover:bg-gray-200 hover:text-muted-foreground dark:bg-gray-700 dark:hover:bg-gray-700",
+          // 代理接管模式下启用按钮使用绿色
+          !isCurrent &&
+            isProxyTakeover &&
+            "bg-emerald-500 hover:bg-emerald-600 dark:bg-emerald-600 dark:hover:bg-emerald-700",
        )}
      >
        {isCurrent ? (
@@ -117,32 +116,6 @@ export function ProviderActions({
          <BarChart3 className="h-4 w-4" />
        </Button>

-        {/* 重置熔断器按钮 - 代理目标启用时显示 */}
-        {onResetCircuitBreaker && isProxyTarget && (
-          <Button
-            size="icon"
-            variant="ghost"
-            onClick={onResetCircuitBreaker}
-            disabled={consecutiveFailures === 0}
-            title={
-              consecutiveFailures > 0
-                ? t("provider.resetCircuitBreaker", {
-                    defaultValue: "重置熔断器",
-                  })
-                : t("provider.noFailures", {
-                    defaultValue: "当前无失败记录",
-                  })
-            }
-            className={cn(
-              iconButtonClass,
-              consecutiveFailures > 0 &&
-                "hover:text-orange-500 dark:hover:text-orange-400",
-            )}
-          >
-            <RotateCcw className="h-4 w-4" />
-          </Button>
-        )}
-
        <Button
          size="icon"
          variant="ghost"
@@ -1,5 +1,5 @@
-import { useMemo } from "react";
-import { GripVertical } from "lucide-react";
+import { useMemo, useState, useEffect } from "react";
+import { GripVertical, ChevronDown, ChevronUp } from "lucide-react";
 import { useTranslation } from "react-i18next";
 import type {
  DraggableAttributes,
@@ -11,15 +11,9 @@ import { cn } from "@/lib/utils";
 import { ProviderActions } from "@/components/providers/ProviderActions";
 import { ProviderIcon } from "@/components/ProviderIcon";
 import UsageFooter from "@/components/UsageFooter";
-import { Switch } from "@/components/ui/switch";
-import { Label } from "@/components/ui/label";
 import { ProviderHealthBadge } from "@/components/providers/ProviderHealthBadge";
-import {
-  useProviderHealth,
-  useResetCircuitBreaker,
-  useSetProxyTarget,
-} from "@/lib/query/failover";
-import { toast } from "sonner";
+import { useProviderHealth } from "@/lib/query/failover";
+import { useUsageQuery } from "@/lib/query/queries";

 interface DragHandleProps {
  attributes: DraggableAttributes;
@@ -40,8 +34,7 @@ interface ProviderCardProps {
  onTest?: (provider: Provider) => void;
  isTesting?: boolean;
  isProxyRunning: boolean;
-  proxyPriority?: number; // 代理目标的实际优先级 (1, 2, 3...)
-  allProviders?: Provider[]; // 所有供应商列表，用于计算开启后的优先级
+  isProxyTakeover?: boolean; // 代理接管模式（Live配置已被接管，切换为热切换）
  dragHandleProps?: DragHandleProps;
 }

@@ -93,8 +86,7 @@ export function ProviderCard({
  onTest,
  isTesting,
  isProxyRunning,
-  proxyPriority,
-  allProviders,
+  isProxyTakeover = false,
  dragHandleProps,
 }: ProviderCardProps) {
  const { t } = useTranslation();
@@ -102,99 +94,6 @@ export function ProviderCard({
  // 获取供应商健康状态
  const { data: health } = useProviderHealth(provider.id, appId);

-  // 设置代理目标
-  const setProxyTargetMutation = useSetProxyTarget();
-
-  // 重置熔断器
-  const resetCircuitBreaker = useResetCircuitBreaker();
-
-  const handleSetProxyTarget = async (enabled: boolean) => {
-    try {
-      await setProxyTargetMutation.mutateAsync({
-        providerId: provider.id,
-        appType: appId,
-        enabled,
-      });
-
-      // 计算实际优先级（开启时）
-      let actualPriority: number | undefined;
-      if (enabled && allProviders) {
-        // 模拟开启后的状态：获取所有将要启用代理的 providers
-        const futureProxyTargets = allProviders.filter((p) => {
-          // 包括：已经是代理目标的 或 当前要开启的这个
-          if (p.id === provider.id) return true;
-          return p.isProxyTarget;
-        });
-
-        // 按 sortIndex 排序
-        const sortedTargets = futureProxyTargets.sort((a, b) => {
-          const indexA = a.sortIndex ?? Number.MAX_SAFE_INTEGER;
-          const indexB = b.sortIndex ?? Number.MAX_SAFE_INTEGER;
-          return indexA - indexB;
-        });
-
-        // 找到当前 provider 的位置
-        const position = sortedTargets.findIndex((p) => p.id === provider.id);
-        actualPriority = position >= 0 ? position + 1 : undefined;
-      }
-
-      const message = enabled
-        ? actualPriority
-          ? t("provider.proxyTargetEnabled", {
-              defaultValue: `已启用代理目标（优先级：P${actualPriority}）`,
-            })
-          : t("provider.proxyTargetEnabled", {
-              defaultValue: "已启用代理目标",
-            })
-        : t("provider.proxyTargetDisabled", {
-            defaultValue: "已禁用代理目标",
-          });
-
-      const description = enabled
-        ? t("provider.proxyTargetEnabledDesc", {
-            defaultValue: "下次请求将按优先级自动选择此供应商",
-          })
-        : t("provider.proxyTargetDisabledDesc", {
-            defaultValue: "后续请求将使用其他可用供应商",
-          });
-
-      toast.success(message, {
-        description,
-        duration: 4000,
-      });
-    } catch (error) {
-      toast.error(
-        t("provider.setProxyTargetFailed", {
-          defaultValue: "操作失败",
-        }) +
-          ": " +
-          String(error),
-      );
-    }
-  };
-
-  const handleResetCircuitBreaker = async () => {
-    try {
-      await resetCircuitBreaker.mutateAsync({
-        providerId: provider.id,
-        appType: appId,
-      });
-      toast.success(
-        t("provider.circuitBreakerReset", {
-          defaultValue: "熔断器已重置",
-        }),
-      );
-    } catch (error) {
-      toast.error(
-        t("provider.circuitBreakerResetFailed", {
-          defaultValue: "重置失败",
-        }) +
-          ": " +
-          String(error),
-      );
-    }
-  };
-
  const fallbackUrlText = t("provider.notConfigured", {
    defaultValue: "未配置接口地址",
  });
@@ -219,6 +118,29 @@ export function ProviderCard({

  const usageEnabled = provider.meta?.usage_script?.enabled ?? false;

+  // 获取用量数据以判断是否有多套餐
+  const autoQueryInterval = isCurrent
+    ? provider.meta?.usage_script?.autoQueryInterval || 0
+    : 0;
+
+  const { data: usage } = useUsageQuery(provider.id, appId, {
+    enabled: usageEnabled,
+    autoQueryInterval,
+  });
+
+  const hasMultiplePlans =
+    usage?.success && usage.data && usage.data.length > 1;
+
+  // 多套餐默认展开
+  const [isExpanded, setIsExpanded] = useState(false);
+
+  // 当检测到多套餐时自动展开
+  useEffect(() => {
+    if (hasMultiplePlans) {
+      setIsExpanded(true);
+    }
+  }, [hasMultiplePlans]);
+
  const handleOpenWebsite = () => {
    if (!isClickableUrl) {
      return;
@@ -230,13 +152,31 @@ export function ProviderCard({
    <div
      className={cn(
        "relative overflow-hidden rounded-xl border border-border p-4 transition-all duration-300",
-        "bg-card text-card-foreground group hover:border-border-active",
-        isCurrent ? "border-primary/50 shadow-sm" : "hover:shadow-sm",
+        "bg-card text-card-foreground group",
+        // 代理接管模式下 hover 使用绿色边框，否则使用蓝色
+        isProxyTakeover
+          ? "hover:border-emerald-500/50"
+          : "hover:border-border-active",
+        // 代理接管模式下当前供应商使用绿色边框
+        isProxyTakeover && isCurrent
+          ? "border-emerald-500/60 shadow-sm shadow-emerald-500/10"
+          : isCurrent
+            ? "border-primary/50 shadow-sm"
+            : "hover:shadow-sm",
        dragHandleProps?.isDragging &&
          "cursor-grabbing border-primary shadow-lg scale-105 z-10",
      )}
    >
-      <div className="absolute inset-0 bg-gradient-to-r from-primary/10 to-transparent opacity-0 group-hover:opacity-100 transition-opacity duration-500 pointer-events-none" />
+      <div
+        className={cn(
+          "absolute inset-0 bg-gradient-to-r to-transparent transition-opacity duration-500 pointer-events-none",
+          // 代理接管模式下使用绿色渐变，否则使用蓝色主色调
+          isProxyTakeover && isCurrent
+            ? "from-emerald-500/10"
+            : "from-primary/10",
+          isCurrent ? "opacity-100" : "opacity-0",
+        )}
+      />
      <div className="relative flex flex-col gap-4 sm:flex-row sm:items-center sm:justify-between">
        <div className="flex flex-1 items-center gap-2">
          <button
@@ -264,31 +204,16 @@ export function ProviderCard({
          </div>

          <div className="space-y-1">
-            <div className="flex flex-wrap items-center gap-2 min-h-[20px]">
+            <div className="flex flex-wrap items-center gap-2 min-h-7">
              <h3 className="text-base font-semibold leading-none">
                {provider.name}
              </h3>

              {/* 健康状态徽章和优先级 */}
-              {isProxyRunning && (
-                <div className="flex items-center gap-1.5">
-                  {/* 健康徽章：代理目标启用时始终显示，没有健康数据时默认为正常(0失败) */}
-                  {(provider.isProxyTarget || health) && (
-                    <ProviderHealthBadge
-                      consecutiveFailures={health?.consecutive_failures ?? 0}
-                      isProxyTarget={provider.isProxyTarget ?? false}
-                    />
-                  )}
-                  {/* 优先级：仅在代理目标启用时显示 */}
-                  {provider.isProxyTarget && proxyPriority && (
-                    <span
-                      className="text-xs text-muted-foreground"
-                      title={`代理队列优先级：第${proxyPriority}位`}
-                    >
-                      P{proxyPriority}
-                    </span>
-                  )}
-                </div>
+              {isProxyRunning && health && (
+                <ProviderHealthBadge
+                  consecutiveFailures={health.consecutive_failures}
+                />
              )}

              {provider.category === "third_party" &&
@@ -302,42 +227,6 @@ export function ProviderCard({
                    ⭐
                  </span>
                )}
-
-              {/* 代理目标开关 - 仅在代理服务运行时显示 */}
-              {isProxyRunning && (
-                <div
-                  className="flex items-center gap-2 ml-2"
-                  onClick={(e) => e.stopPropagation()}
-                >
-                  <Switch
-                    id={`proxy-target-switch-${provider.id}`}
-                    checked={provider.isProxyTarget || false}
-                    onCheckedChange={(checked) => {
-                      handleSetProxyTarget(checked);
-                    }}
-                    disabled={setProxyTargetMutation.isPending}
-                    className="scale-75 data-[state=checked]:bg-green-500"
-                  />
-                  {provider.isProxyTarget && (
-                    <Label
-                      htmlFor={`proxy-target-switch-${provider.id}`}
-                      className="text-xs font-medium text-green-600 dark:text-green-400 cursor-pointer"
-                    >
-                      {t("provider.proxyTarget", { defaultValue: "代理目标" })}
-                    </Label>
-                  )}
-                  {!provider.isProxyTarget && (
-                    <Label
-                      htmlFor={`proxy-target-switch-${provider.id}`}
-                      className="text-xs text-muted-foreground cursor-pointer opacity-0 group-hover:opacity-100 transition-opacity"
-                    >
-                      {t("provider.setAsProxyTarget", {
-                        defaultValue: "设为代理",
-                      })}
-                    </Label>
-                  )}
-                </div>
-              )}
            </div>

            {displayUrl && (
@@ -359,39 +248,84 @@ export function ProviderCard({
          </div>
        </div>

-        <div className="relative flex items-center ml-auto">
-          <div className="ml-auto transition-transform duration-200 group-hover:-translate-x-[12.25rem] group-focus-within:-translate-x-[12.25rem] sm:group-hover:-translate-x-[14.25rem] sm:group-focus-within:-translate-x-[14.25rem]">
-            <UsageFooter
-              provider={provider}
-              providerId={provider.id}
-              appId={appId}
-              usageEnabled={usageEnabled}
-              isCurrent={isCurrent}
-              inline={true}
-            />
+        <div className="relative flex items-center ml-auto min-w-0">
+          {/* 用量信息区域 - hover 时向左移动，为操作按钮腾出空间 */}
+          <div className="ml-auto transition-transform duration-200 group-hover:-translate-x-[14.5rem] group-focus-within:-translate-x-[14.5rem] sm:group-hover:-translate-x-[16rem] sm:group-focus-within:-translate-x-[16rem]">
+            <div className="flex items-center gap-1">
+              {/* 多套餐时显示套餐数量，单套餐时显示详细信息 */}
+              {hasMultiplePlans ? (
+                <div className="flex items-center gap-2 text-xs text-gray-600 dark:text-gray-400">
+                  <span className="font-medium">
+                    {t("usage.multiplePlans", {
+                      count: usage?.data?.length || 0,
+                      defaultValue: `${usage?.data?.length || 0} 个套餐`,
+                    })}
+                  </span>
+                </div>
+              ) : (
+                <UsageFooter
+                  provider={provider}
+                  providerId={provider.id}
+                  appId={appId}
+                  usageEnabled={usageEnabled}
+                  isCurrent={isCurrent}
+                  inline={true}
+                />
+              )}
+              {/* 展开/折叠按钮 - 仅在有多套餐时显示 */}
+              {hasMultiplePlans && (
+                <button
+                  onClick={(e) => {
+                    e.stopPropagation();
+                    setIsExpanded(!isExpanded);
+                  }}
+                  className="p-1 rounded hover:bg-gray-100 dark:hover:bg-gray-800 transition-colors text-gray-500 dark:text-gray-400 flex-shrink-0"
+                  title={
+                    isExpanded
+                      ? t("usage.collapse", { defaultValue: "收起" })
+                      : t("usage.expand", { defaultValue: "展开" })
+                  }
+                >
+                  {isExpanded ? (
+                    <ChevronUp size={14} />
+                  ) : (
+                    <ChevronDown size={14} />
+                  )}
+                </button>
+              )}
+            </div>
          </div>

+          {/* 操作按钮区域 - 绝对定位在右侧，hover 时滑入 */}
          <div className="absolute right-0 top-1/2 -translate-y-1/2 flex items-center gap-1.5 opacity-0 pointer-events-none group-hover:opacity-100 group-focus-within:opacity-100 group-hover:pointer-events-auto group-focus-within:pointer-events-auto transition-all duration-200 translate-x-2 group-hover:translate-x-0 group-focus-within:translate-x-0">
            <ProviderActions
              isCurrent={isCurrent}
              isTesting={isTesting}
+              isProxyTakeover={isProxyTakeover}
              onSwitch={() => onSwitch(provider)}
              onEdit={() => onEdit(provider)}
              onDuplicate={() => onDuplicate(provider)}
              onTest={onTest ? () => onTest(provider) : undefined}
              onConfigureUsage={() => onConfigureUsage(provider)}
              onDelete={() => onDelete(provider)}
-              onResetCircuitBreaker={
-                isProxyRunning && provider.isProxyTarget
-                  ? handleResetCircuitBreaker
-                  : undefined
-              }
-              isProxyTarget={provider.isProxyTarget}
-              consecutiveFailures={health?.consecutive_failures ?? 0}
            />
          </div>
        </div>
      </div>
+
+      {/* 展开的完整套餐列表 */}
+      {isExpanded && hasMultiplePlans && (
+        <div className="mt-4 pt-4 border-t border-border-default">
+          <UsageFooter
+            provider={provider}
+            providerId={provider.id}
+            appId={appId}
+            usageEnabled={usageEnabled}
+            isCurrent={isCurrent}
+            inline={false}
+          />
+        </div>
+      )}
    </div>
  );
 }
@@ -3,7 +3,6 @@ import { ProviderHealthStatus } from "@/types/proxy";

 interface ProviderHealthBadgeProps {
  consecutiveFailures: number;
-  isProxyTarget?: boolean;
  className?: string;
 }

@@ -13,14 +12,8 @@ interface ProviderHealthBadgeProps {
 */
 export function ProviderHealthBadge({
  consecutiveFailures,
-  isProxyTarget,
  className,
 }: ProviderHealthBadgeProps) {
-  // 如果代理目标已关闭但有失败记录，仍然显示（自动熔断场景）
-  // 如果代理目标启用，始终显示
-  // 如果代理目标关闭且无失败记录，隐藏
-  if (!isProxyTarget && consecutiveFailures === 0) return null;
-
  // 根据失败次数计算状态
  const getStatus = () => {
    if (consecutiveFailures === 0) {
@@ -5,12 +5,11 @@ import {
  useSortable,
  verticalListSortingStrategy,
 } from "@dnd-kit/sortable";
-import { useMemo } from "react";
 import type { CSSProperties } from "react";
 import type { Provider } from "@/types";
 import type { AppId } from "@/lib/api";
 import { useDragSort } from "@/hooks/useDragSort";
-import { useModelTest } from "@/hooks/useModelTest";
+import { useStreamCheck } from "@/hooks/useStreamCheck";
 import { ProviderCard } from "@/components/providers/ProviderCard";
 import { ProviderEmptyState } from "@/components/providers/ProviderEmptyState";

@@ -27,6 +26,7 @@ interface ProviderListProps {
  onCreate?: () => void;
  isLoading?: boolean;
  isProxyRunning?: boolean; // 代理服务运行状态
+  isProxyTakeover?: boolean; // 代理接管模式（Live配置已被接管）
 }

 export function ProviderList({
@@ -42,38 +42,18 @@ export function ProviderList({
  onCreate,
  isLoading = false,
  isProxyRunning = false, // 默认值为 false
+  isProxyTakeover = false, // 默认值为 false
 }: ProviderListProps) {
  const { sortedProviders, sensors, handleDragEnd } = useDragSort(
    providers,
    appId,
  );

-  // 模型测试
-  const { testProvider, isTesting } = useModelTest(appId);
-
-  // 计算代理目标的实际优先级映射 (P1, P2, P3...)
-  const proxyPriorityMap = useMemo(() => {
-    // 获取所有启用代理目标的供应商
-    const proxyTargets = sortedProviders.filter((p) => p.isProxyTarget);
-
-    // 按 sortIndex 排序
-    const sortedTargets = proxyTargets.sort((a, b) => {
-      const indexA = a.sortIndex ?? Number.MAX_SAFE_INTEGER;
-      const indexB = b.sortIndex ?? Number.MAX_SAFE_INTEGER;
-      return indexA - indexB;
-    });
-
-    // 创建优先级映射
-    const map = new Map<string, number>();
-    sortedTargets.forEach((provider, index) => {
-      map.set(provider.id, index + 1); // P1, P2, P3...
-    });
-
-    return map;
-  }, [sortedProviders]);
+  // 流式健康检查
+  const { checkProvider, isChecking } = useStreamCheck(appId);

  const handleTest = (provider: Provider) => {
-    testProvider(provider.id, provider.name);
+    checkProvider(provider.id, provider.name);
  };

  if (isLoading) {
@@ -120,10 +100,9 @@ export function ProviderList({
              onConfigureUsage={onConfigureUsage}
              onOpenWebsite={onOpenWebsite}
              onTest={handleTest}
-              isTesting={isTesting(provider.id)}
+              isTesting={isChecking(provider.id)}
              isProxyRunning={isProxyRunning}
-              proxyPriority={proxyPriorityMap.get(provider.id)}
-              allProviders={sortedProviders}
+              isProxyTakeover={isProxyTakeover}
            />
          ))}
        </div>
@@ -145,8 +124,7 @@ interface SortableProviderCardProps {
  onTest: (provider: Provider) => void;
  isTesting: boolean;
  isProxyRunning: boolean;
-  proxyPriority?: number; // 代理目标的实际优先级 (1, 2, 3...)
-  allProviders?: Provider[]; // 所有供应商列表
+  isProxyTakeover: boolean;
 }

 function SortableProviderCard({
@@ -162,8 +140,7 @@ function SortableProviderCard({
  onTest,
  isTesting,
  isProxyRunning,
-  proxyPriority,
-  allProviders,
+  isProxyTakeover,
 }: SortableProviderCardProps) {
  const {
    setNodeRef,
@@ -196,8 +173,7 @@ function SortableProviderCard({
        onTest={onTest}
        isTesting={isTesting}
        isProxyRunning={isProxyRunning}
-        proxyPriority={proxyPriority}
-        allProviders={allProviders}
+        isProxyTakeover={isProxyTakeover}
        dragHandleProps={{
          attributes,
          listeners,
@@ -1,4 +1,4 @@
-import { useState, useCallback } from "react";
+import { useEffect, useState, useCallback } from "react";
 import type { ProviderCategory } from "@/types";
 import {
  getApiKeyFromConfig,
@@ -32,6 +32,28 @@ export function useApiKeyState({
    return "";
  });

+  // 当外部通过 form.reset / 读取 live 等方式更新配置时，同步回 API Key 状态
+  // - 仅在 JSON 可解析时同步，避免用户编辑 JSON 过程中因临时无效导致输入框闪烁
+  useEffect(() => {
+    if (!initialConfig) return;
+
+    try {
+      JSON.parse(initialConfig);
+    } catch {
+      return;
+    }
+
+    // 仅当配置确实包含 API Key 字段时才同步（避免无意清空用户正在输入的 key）
+    if (!hasApiKeyField(initialConfig, appType)) {
+      return;
+    }
+
+    const extracted = getApiKeyFromConfig(initialConfig, appType);
+    if (extracted !== apiKey) {
+      setApiKey(extracted);
+    }
+  }, [initialConfig, appType, apiKey]);
+
  const handleApiKeyChange = useCallback(
    (key: string) => {
      setApiKey(key);
@@ -18,8 +18,11 @@ export interface AutoFailoverConfigPanelProps {

 export function AutoFailoverConfigPanel({
  enabled,
-  onEnabledChange,
+  onEnabledChange: _onEnabledChange,
 }: AutoFailoverConfigPanelProps) {
+  // Note: onEnabledChange is currently unused but kept in the interface
+  // for potential future use by parent components
+  void _onEnabledChange;
  const { t } = useTranslation();
  const { data: config, isLoading, error } = useCircuitBreakerConfig();
  const updateConfig = useUpdateCircuitBreakerConfig();
@@ -51,6 +54,7 @@ export function AutoFailoverConfigPanel({
      });
      toast.success(
        t("proxy.autoFailover.configSaved", "自动故障转移配置已保存"),
+        { closeButton: true },
      );
    } catch (e) {
      toast.error(
@@ -77,11 +81,11 @@ export function AutoFailoverConfigPanel({

  return (
    <div className="border-0 rounded-none shadow-none bg-transparent">
-      {/* Header Switch moved to parent accordion logic or kept here absolutely positioned if styling permits. 
-            Since we need it in the accordion header, and this component is inside the content, we can use a portal or 
-            absolute positioning trick similar to ProxyPanel, OR cleaner, just duplicate the switch logic in SettingsPage 
-            and pass it down. But for now, let's use the absolute positioning trick to "lift" it visually. 
-            Better yet, let's just render the content directly without the wrapping Card header/collapse logic 
+      {/* Header Switch moved to parent accordion logic or kept here absolutely positioned if styling permits.
+            Since we need it in the accordion header, and this component is inside the content, we can use a portal or
+            absolute positioning trick similar to ProxyPanel, OR cleaner, just duplicate the switch logic in SettingsPage
+            and pass it down. But for now, let's use the absolute positioning trick to "lift" it visually.
+            Better yet, let's just render the content directly without the wrapping Card header/collapse logic
            since the user requested "click to expand is detailed info, no need to fold again" (implying the accordion handles folding).
        */}

@@ -97,7 +101,7 @@ export function AutoFailoverConfigPanel({
          <AlertDescription className="text-sm">
            {t(
              "proxy.autoFailover.info",
-              "当启用多个代理目标时，系统会按优先级顺序依次尝试。当某个供应商连续失败达到阈值时，熔断器会自动打开，跳过该供应商。",
+              "当故障转移队列中配置了多个供应商时，系统会在请求失败时按优先级顺序依次尝试。当某个供应商连续失败达到阈值时，熔断器会打开并在一段时间内跳过该供应商。",
            )}
          </AlertDescription>
        </Alert>
@@ -262,7 +266,7 @@ export function AutoFailoverConfigPanel({
          </Button>
          <Button
            onClick={handleSave}
-            disabled={updateConfig.isPending || !formData.enabled}
+            disabled={updateConfig.isPending || !enabled}
          >
            {updateConfig.isPending ? (
              <>
@@ -34,7 +34,7 @@ export function CircuitBreakerConfigPanel() {
  const handleSave = async () => {
    try {
      await updateConfig.mutateAsync(formData);
-      toast.success("熔断器配置已保存");
+      toast.success("熔断器配置已保存", { closeButton: true });
    } catch (error) {
      toast.error("保存失败: " + String(error));
    }
@@ -0,0 +1,414 @@
+/**
+ * 故障转移队列管理组件
+ *
+ * 允许用户管理代理模式下的故障转移队列，支持：
+ * - 拖拽排序
+ * - 添加/移除供应商
+ * - 启用/禁用队列项
+ */
+
+import { useState, useCallback, useMemo } from "react";
+import { useTranslation } from "react-i18next";
+import { CSS } from "@dnd-kit/utilities";
+import { DndContext, closestCenter } from "@dnd-kit/core";
+import {
+  SortableContext,
+  useSortable,
+  verticalListSortingStrategy,
+} from "@dnd-kit/sortable";
+import {
+  KeyboardSensor,
+  PointerSensor,
+  useSensor,
+  useSensors,
+  type DragEndEvent,
+} from "@dnd-kit/core";
+import { arrayMove, sortableKeyboardCoordinates } from "@dnd-kit/sortable";
+import { toast } from "sonner";
+import {
+  GripVertical,
+  Plus,
+  Trash2,
+  Loader2,
+  Info,
+  AlertTriangle,
+} from "lucide-react";
+import { Button } from "@/components/ui/button";
+import { Switch } from "@/components/ui/switch";
+import { Alert, AlertDescription } from "@/components/ui/alert";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import { cn } from "@/lib/utils";
+import type { FailoverQueueItem } from "@/types/proxy";
+import type { AppId } from "@/lib/api";
+import {
+  useFailoverQueue,
+  useAvailableProvidersForFailover,
+  useAddToFailoverQueue,
+  useRemoveFromFailoverQueue,
+  useReorderFailoverQueue,
+  useSetFailoverItemEnabled,
+} from "@/lib/query/failover";
+
+interface FailoverQueueManagerProps {
+  appType: AppId;
+  disabled?: boolean;
+}
+
+export function FailoverQueueManager({
+  appType,
+  disabled = false,
+}: FailoverQueueManagerProps) {
+  const { t } = useTranslation();
+  const [selectedProviderId, setSelectedProviderId] = useState<string>("");
+
+  // 查询数据
+  const {
+    data: queue,
+    isLoading: isQueueLoading,
+    error: queueError,
+  } = useFailoverQueue(appType);
+  const { data: availableProviders, isLoading: isProvidersLoading } =
+    useAvailableProvidersForFailover(appType);
+
+  // Mutations
+  const addToQueue = useAddToFailoverQueue();
+  const removeFromQueue = useRemoveFromFailoverQueue();
+  const reorderQueue = useReorderFailoverQueue();
+  const setItemEnabled = useSetFailoverItemEnabled();
+
+  // 拖拽配置
+  const sensors = useSensors(
+    useSensor(PointerSensor, {
+      activationConstraint: { distance: 8 },
+    }),
+    useSensor(KeyboardSensor, {
+      coordinateGetter: sortableKeyboardCoordinates,
+    }),
+  );
+
+  // 排序后的队列
+  const sortedQueue = useMemo(() => {
+    if (!queue) return [];
+    return [...queue].sort((a, b) => a.queueOrder - b.queueOrder);
+  }, [queue]);
+
+  // 处理拖拽结束
+  const handleDragEnd = useCallback(
+    async (event: DragEndEvent) => {
+      const { active, over } = event;
+      if (!over || active.id === over.id || !sortedQueue) return;
+
+      const oldIndex = sortedQueue.findIndex(
+        (item) => item.providerId === active.id,
+      );
+      const newIndex = sortedQueue.findIndex(
+        (item) => item.providerId === over.id,
+      );
+
+      if (oldIndex === -1 || newIndex === -1) return;
+
+      const reordered = arrayMove(sortedQueue, oldIndex, newIndex);
+      const providerIds = reordered.map((item) => item.providerId);
+
+      try {
+        await reorderQueue.mutateAsync({ appType, providerIds });
+        toast.success(
+          t("proxy.failoverQueue.reorderSuccess", "队列顺序已更新"),
+          { closeButton: true },
+        );
+      } catch (error) {
+        toast.error(
+          t("proxy.failoverQueue.reorderFailed", "更新顺序失败") +
+            ": " +
+            String(error),
+        );
+      }
+    },
+    [sortedQueue, appType, reorderQueue, t],
+  );
+
+  // 添加供应商到队列
+  const handleAddProvider = async () => {
+    if (!selectedProviderId) return;
+
+    try {
+      await addToQueue.mutateAsync({
+        appType,
+        providerId: selectedProviderId,
+      });
+      setSelectedProviderId("");
+      toast.success(
+        t("proxy.failoverQueue.addSuccess", "已添加到故障转移队列"),
+        { closeButton: true },
+      );
+    } catch (error) {
+      toast.error(
+        t("proxy.failoverQueue.addFailed", "添加失败") + ": " + String(error),
+      );
+    }
+  };
+
+  // 从队列移除供应商
+  const handleRemoveProvider = async (providerId: string) => {
+    try {
+      await removeFromQueue.mutateAsync({ appType, providerId });
+      toast.success(
+        t("proxy.failoverQueue.removeSuccess", "已从故障转移队列移除"),
+        { closeButton: true },
+      );
+    } catch (error) {
+      toast.error(
+        t("proxy.failoverQueue.removeFailed", "移除失败") +
+          ": " +
+          String(error),
+      );
+    }
+  };
+
+  // 切换启用状态
+  const handleToggleEnabled = async (providerId: string, enabled: boolean) => {
+    try {
+      await setItemEnabled.mutateAsync({ appType, providerId, enabled });
+    } catch (error) {
+      toast.error(
+        t("proxy.failoverQueue.toggleFailed", "状态更新失败") +
+          ": " +
+          String(error),
+      );
+    }
+  };
+
+  if (isQueueLoading) {
+    return (
+      <div className="flex items-center justify-center p-8">
+        <Loader2 className="h-6 w-6 animate-spin text-muted-foreground" />
+      </div>
+    );
+  }
+
+  if (queueError) {
+    return (
+      <Alert variant="destructive">
+        <AlertTriangle className="h-4 w-4" />
+        <AlertDescription>{String(queueError)}</AlertDescription>
+      </Alert>
+    );
+  }
+
+  return (
+    <div className="space-y-4">
+      {/* 说明信息 */}
+      <Alert className="border-blue-500/40 bg-blue-500/10">
+        <Info className="h-4 w-4" />
+        <AlertDescription className="text-sm">
+          {t(
+            "proxy.failoverQueue.info",
+            "当前激活的供应商始终优先。当请求失败时，系统会按队列顺序依次尝试其他供应商。",
+          )}
+        </AlertDescription>
+      </Alert>
+
+      {/* 添加供应商 */}
+      <div className="flex items-center gap-2">
+        <Select
+          value={selectedProviderId}
+          onValueChange={setSelectedProviderId}
+          disabled={disabled || isProvidersLoading}
+        >
+          <SelectTrigger className="flex-1">
+            <SelectValue
+              placeholder={t(
+                "proxy.failoverQueue.selectProvider",
+                "选择供应商添加到队列",
+              )}
+            />
+          </SelectTrigger>
+          <SelectContent>
+            {availableProviders?.map((provider) => (
+              <SelectItem key={provider.id} value={provider.id}>
+                {provider.name}
+              </SelectItem>
+            ))}
+            {(!availableProviders || availableProviders.length === 0) && (
+              <div className="px-2 py-4 text-center text-sm text-muted-foreground">
+                {t(
+                  "proxy.failoverQueue.noAvailableProviders",
+                  "没有可添加的供应商",
+                )}
+              </div>
+            )}
+          </SelectContent>
+        </Select>
+        <Button
+          onClick={handleAddProvider}
+          disabled={disabled || !selectedProviderId || addToQueue.isPending}
+          size="icon"
+          variant="outline"
+        >
+          {addToQueue.isPending ? (
+            <Loader2 className="h-4 w-4 animate-spin" />
+          ) : (
+            <Plus className="h-4 w-4" />
+          )}
+        </Button>
+      </div>
+
+      {/* 队列列表 */}
+      {sortedQueue.length === 0 ? (
+        <div className="rounded-lg border border-dashed border-muted-foreground/40 p-8 text-center">
+          <p className="text-sm text-muted-foreground">
+            {t(
+              "proxy.failoverQueue.empty",
+              "故障转移队列为空。添加供应商以启用自动故障转移。",
+            )}
+          </p>
+        </div>
+      ) : (
+        <DndContext
+          sensors={sensors}
+          collisionDetection={closestCenter}
+          onDragEnd={handleDragEnd}
+        >
+          <SortableContext
+            items={sortedQueue.map((item) => item.providerId)}
+            strategy={verticalListSortingStrategy}
+          >
+            <div className="space-y-2">
+              {sortedQueue.map((item, index) => (
+                <SortableQueueItem
+                  key={item.providerId}
+                  item={item}
+                  index={index}
+                  disabled={disabled}
+                  onToggleEnabled={handleToggleEnabled}
+                  onRemove={handleRemoveProvider}
+                  isRemoving={removeFromQueue.isPending}
+                  isToggling={setItemEnabled.isPending}
+                />
+              ))}
+            </div>
+          </SortableContext>
+        </DndContext>
+      )}
+
+      {/* 队列说明 */}
+      {sortedQueue.length > 0 && (
+        <p className="text-xs text-muted-foreground">
+          {t(
+            "proxy.failoverQueue.dragHint",
+            "拖拽供应商可调整故障转移顺序，序号越小优先级越高。",
+          )}
+        </p>
+      )}
+    </div>
+  );
+}
+
+interface SortableQueueItemProps {
+  item: FailoverQueueItem;
+  index: number;
+  disabled: boolean;
+  onToggleEnabled: (providerId: string, enabled: boolean) => void;
+  onRemove: (providerId: string) => void;
+  isRemoving: boolean;
+  isToggling: boolean;
+}
+
+function SortableQueueItem({
+  item,
+  index,
+  disabled,
+  onToggleEnabled,
+  onRemove,
+  isRemoving,
+  isToggling,
+}: SortableQueueItemProps) {
+  const { t } = useTranslation();
+  const {
+    setNodeRef,
+    attributes,
+    listeners,
+    transform,
+    transition,
+    isDragging,
+  } = useSortable({ id: item.providerId, disabled });
+
+  const style = {
+    transform: CSS.Transform.toString(transform),
+    transition,
+  };
+
+  return (
+    <div
+      ref={setNodeRef}
+      style={style}
+      className={cn(
+        "flex items-center gap-3 rounded-lg border bg-card p-3 transition-colors",
+        isDragging && "opacity-50 shadow-lg",
+        !item.enabled && "opacity-60",
+      )}
+    >
+      {/* 拖拽手柄 */}
+      <button
+        type="button"
+        className={cn(
+          "cursor-grab touch-none text-muted-foreground hover:text-foreground",
+          disabled && "cursor-not-allowed opacity-50",
+        )}
+        {...attributes}
+        {...listeners}
+        disabled={disabled}
+        aria-label={t("provider.dragHandle", "拖拽排序")}
+      >
+        <GripVertical className="h-5 w-5" />
+      </button>
+
+      {/* 序号 */}
+      <div className="flex h-6 w-6 items-center justify-center rounded-full bg-muted text-xs font-medium">
+        {index + 1}
+      </div>
+
+      {/* 供应商名称 */}
+      <div className="flex-1 min-w-0">
+        <span
+          className={cn(
+            "text-sm font-medium truncate block",
+            !item.enabled && "text-muted-foreground line-through",
+          )}
+        >
+          {item.providerName}
+        </span>
+      </div>
+
+      {/* 启用开关 */}
+      <Switch
+        checked={item.enabled}
+        onCheckedChange={(checked) => onToggleEnabled(item.providerId, checked)}
+        disabled={disabled || isToggling}
+        aria-label={t("proxy.failoverQueue.toggleEnabled", "启用/禁用")}
+      />
+
+      {/* 删除按钮 */}
+      <Button
+        variant="ghost"
+        size="icon"
+        className="h-8 w-8 text-muted-foreground hover:text-destructive"
+        onClick={() => onRemove(item.providerId)}
+        disabled={disabled || isRemoving}
+        aria-label={t("common.delete", "删除")}
+      >
+        {isRemoving ? (
+          <Loader2 className="h-4 w-4 animate-spin" />
+        ) : (
+          <Trash2 className="h-4 w-4" />
+        )}
+      </Button>
+    </div>
+  );
+}
@@ -1,10 +1,17 @@
 import { useState } from "react";
-import { Activity, Clock, TrendingUp, Server, ListOrdered } from "lucide-react";
+import {
+  Activity,
+  Clock,
+  TrendingUp,
+  Server,
+  ListOrdered,
+  Settings,
+} from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { useProxyStatus } from "@/hooks/useProxyStatus";
 import { ProxySettingsDialog } from "./ProxySettingsDialog";
 import { toast } from "sonner";
-import { useProxyTargets } from "@/lib/query/failover";
+import { useFailoverQueue } from "@/lib/query/failover";
 import { ProviderHealthBadge } from "@/components/providers/ProviderHealthBadge";
 import { useProviderHealth } from "@/lib/query/failover";
 import type { ProxyStatus } from "@/types/proxy";
@@ -13,10 +20,11 @@ export function ProxyPanel() {
  const { status, isRunning } = useProxyStatus();
  const [showSettings, setShowSettings] = useState(false);

-  // 获取所有三个应用类型的代理目标列表
-  const { data: claudeTargets = [] } = useProxyTargets("claude");
-  const { data: codexTargets = [] } = useProxyTargets("codex");
-  const { data: geminiTargets = [] } = useProxyTargets("gemini");
+  // 获取所有三个应用类型的故障转移队列（不包含当前供应商）
+  // 当前供应商始终优先，队列仅用于失败后的备用顺序
+  const { data: claudeQueue = [] } = useFailoverQueue("claude");
+  const { data: codexQueue = [] } = useFailoverQueue("codex");
+  const { data: geminiQueue = [] } = useFailoverQueue("gemini");

  const formatUptime = (seconds: number): string => {
    const hours = Math.floor(seconds / 3600);
@@ -39,8 +47,19 @@ export function ProxyPanel() {
          <div className="space-y-6">
            <div className="rounded-lg border border-border bg-muted/40 p-4 space-y-4">
              <div>
-                <p className="text-xs text-muted-foreground">服务地址</p>
-                <div className="mt-2 flex flex-col gap-2 sm:flex-row sm:items-center">
+                <div className="flex items-center justify-between mb-2">
+                  <p className="text-xs text-muted-foreground">服务地址</p>
+                  <Button
+                    size="sm"
+                    variant="ghost"
+                    onClick={() => setShowSettings(true)}
+                    className="h-7 gap-1.5 text-xs"
+                  >
+                    <Settings className="h-3.5 w-3.5" />
+                    配置
+                  </Button>
+                </div>
+                <div className="flex flex-col gap-2 sm:flex-row sm:items-center">
                  <code className="flex-1 text-sm bg-background px-3 py-2 rounded border border-border/60">
                    http://{status.address}:{status.port}
                  </code>
@@ -51,7 +70,7 @@ export function ProxyPanel() {
                      navigator.clipboard.writeText(
                        `http://${status.address}:${status.port}`,
                      );
-                      toast.success("地址已复制");
+                      toast.success("地址已复制", { closeButton: true });
                    }}
                  >
                    复制
@@ -95,9 +114,9 @@ export function ProxyPanel() {
              </div>

              {/* 供应商队列 - 按应用类型分组展示 */}
-              {(claudeTargets.length > 0 ||
-                codexTargets.length > 0 ||
-                geminiTargets.length > 0) && (
+              {(claudeQueue.length > 0 ||
+                codexQueue.length > 0 ||
+                geminiQueue.length > 0) && (
                <div className="pt-3 border-t border-border space-y-3">
                  <div className="flex items-center gap-2">
                    <ListOrdered className="h-3.5 w-3.5 text-muted-foreground" />
@@ -107,31 +126,49 @@ export function ProxyPanel() {
                  </div>

                  {/* Claude 队列 */}
-                  {claudeTargets.length > 0 && (
+                  {claudeQueue.length > 0 && (
                    <ProviderQueueGroup
                      appType="claude"
                      appLabel="Claude"
-                      targets={claudeTargets}
+                      targets={claudeQueue
+                        .filter((item) => item.enabled)
+                        .sort((a, b) => a.queueOrder - b.queueOrder)
+                        .map((item) => ({
+                          id: item.providerId,
+                          name: item.providerName,
+                        }))}
                      status={status}
                    />
                  )}

                  {/* Codex 队列 */}
-                  {codexTargets.length > 0 && (
+                  {codexQueue.length > 0 && (
                    <ProviderQueueGroup
                      appType="codex"
                      appLabel="Codex"
-                      targets={codexTargets}
+                      targets={codexQueue
+                        .filter((item) => item.enabled)
+                        .sort((a, b) => a.queueOrder - b.queueOrder)
+                        .map((item) => ({
+                          id: item.providerId,
+                          name: item.providerName,
+                        }))}
                      status={status}
                    />
                  )}

                  {/* Gemini 队列 */}
-                  {geminiTargets.length > 0 && (
+                  {geminiQueue.length > 0 && (
                    <ProviderQueueGroup
                      appType="gemini"
                      appLabel="Gemini"
-                      targets={geminiTargets}
+                      targets={geminiQueue
+                        .filter((item) => item.enabled)
+                        .sort((a, b) => a.queueOrder - b.queueOrder)
+                        .map((item) => ({
+                          id: item.providerId,
+                          name: item.providerName,
+                        }))}
                      status={status}
                    />
                  )}
@@ -171,9 +208,18 @@ export function ProxyPanel() {
            <p className="text-base font-medium text-foreground mb-1">
              代理服务已停止
            </p>
-            <p className="text-sm text-muted-foreground">
+            <p className="text-sm text-muted-foreground mb-4">
              使用右上角开关即可启动服务
            </p>
+            <Button
+              size="sm"
+              variant="outline"
+              onClick={() => setShowSettings(true)}
+              className="gap-1.5"
+            >
+              <Settings className="h-4 w-4" />
+              配置代理服务
+            </Button>
          </div>
        )}
      </section>
@@ -302,10 +348,9 @@ function ProviderQueueItem({
          </span>
        )}
      </div>
-      {/* 健康徽章：队列中的代理目标始终显示，没有健康数据时默认为正常 */}
+      {/* 健康徽章 */}
      <ProviderHealthBadge
        consecutiveFailures={health?.consecutive_failures ?? 0}
-        isProxyTarget={true}
      />
    </div>
  );
@@ -0,0 +1,91 @@
+/**
+ * 代理模式切换开关组件
+ *
+ * 放置在主界面头部，用于一键启用/关闭代理模式
+ * 启用时自动接管 Live 配置，关闭时恢复原始配置
+ */
+
+import { Radio, Loader2 } from "lucide-react";
+import { Switch } from "@/components/ui/switch";
+import { useProxyStatus } from "@/hooks/useProxyStatus";
+import { cn } from "@/lib/utils";
+import { useTranslation } from "react-i18next";
+import type { AppId } from "@/lib/api";
+
+interface ProxyToggleProps {
+  className?: string;
+  activeApp: AppId;
+}
+
+export function ProxyToggle({ className, activeApp }: ProxyToggleProps) {
+  const { t } = useTranslation();
+  const { isRunning, takeoverStatus, setTakeoverForApp, isPending, status } =
+    useProxyStatus();
+
+  const handleToggle = async (checked: boolean) => {
+    await setTakeoverForApp({ appType: activeApp, enabled: checked });
+  };
+
+  const takeoverEnabled = takeoverStatus?.[activeApp] || false;
+
+  const appLabel =
+    activeApp === "claude"
+      ? "Claude"
+      : activeApp === "codex"
+        ? "Codex"
+        : "Gemini";
+
+  const tooltipText = takeoverEnabled
+    ? isRunning
+      ? t("proxy.takeover.tooltip.active", {
+          defaultValue: `${appLabel} 已接管 - ${status?.address}:${status?.port}\n切换该应用供应商为热切换`,
+        })
+      : t("proxy.takeover.tooltip.broken", {
+          defaultValue: `${appLabel} 已接管，但代理服务未运行`,
+        })
+    : t("proxy.takeover.tooltip.inactive", {
+        defaultValue: `接管 ${appLabel} 的 Live 配置，让该应用请求走本地代理`,
+      });
+
+  return (
+    <div
+      className={cn(
+        "flex items-center gap-2 px-3 py-1.5 rounded-lg transition-all cursor-default",
+        takeoverEnabled
+          ? "bg-emerald-500/10 border border-emerald-500/30"
+          : "bg-muted/50 hover:bg-muted",
+        className,
+      )}
+      title={tooltipText}
+    >
+      {isPending ? (
+        <Loader2 className="h-4 w-4 animate-spin text-muted-foreground" />
+      ) : (
+        <Radio
+          className={cn(
+            "h-4 w-4 transition-colors",
+            takeoverEnabled
+              ? "text-emerald-500 animate-pulse"
+              : "text-muted-foreground",
+          )}
+        />
+      )}
+      <span
+        className={cn(
+          "text-sm font-medium transition-colors select-none",
+          takeoverEnabled
+            ? "text-emerald-600 dark:text-emerald-400"
+            : "text-muted-foreground",
+        )}
+      >
+        Proxy
+      </span>
+      <Switch
+        checked={takeoverEnabled}
+        onCheckedChange={handleToggle}
+        disabled={isPending}
+        className="ml-1"
+      />
+    </div>
+  );
+}
@@ -1,6 +1,7 @@
 import { useCallback, useEffect, useState } from "react";
 import {
  Download,
+  Copy,
  ExternalLink,
  Info,
  Loader2,
@@ -8,6 +9,7 @@ import {
  Terminal,
  CheckCircle2,
  AlertCircle,
+  Sparkles,
 } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { useTranslation } from "react-i18next";
@@ -17,6 +19,7 @@ import { settingsApi } from "@/lib/api";
 import { useUpdate } from "@/contexts/UpdateContext";
 import { relaunchApp } from "@/lib/updater";
 import { Badge } from "@/components/ui/badge";
+import { motion } from "framer-motion";

 interface AboutSectionProps {
  isPortable: boolean;
@@ -29,6 +32,10 @@ interface ToolVersion {
  error: string | null;
 }

+const ONE_CLICK_INSTALL_COMMANDS = `npm i -g @anthropic-ai/claude-code@latest
+npm i -g @openai/codex@latest
+npm i -g @google/gemini-cli@latest`;
+
 export function AboutSection({ isPortable }: AboutSectionProps) {
  // ... (use hooks as before) ...
  const { t } = useTranslation();
@@ -47,6 +54,18 @@ export function AboutSection({ isPortable }: AboutSectionProps) {
    isChecking,
  } = useUpdate();

+  const loadToolVersions = useCallback(async () => {
+    setIsLoadingTools(true);
+    try {
+      const tools = await settingsApi.getToolVersions();
+      setToolVersions(tools);
+    } catch (error) {
+      console.error("[AboutSection] Failed to load tool versions", error);
+    } finally {
+      setIsLoadingTools(false);
+    }
+  }, []);
+
  useEffect(() => {
    let active = true;
    const load = async () => {
@@ -142,7 +161,7 @@ export function AboutSection({ isPortable }: AboutSectionProps) {
    try {
      const available = await checkUpdate();
      if (!available) {
-        toast.success(t("settings.upToDate"));
+        toast.success(t("settings.upToDate"), { closeButton: true });
      }
    } catch (error) {
      console.error("[AboutSection] Check update failed", error);
@@ -150,10 +169,25 @@ export function AboutSection({ isPortable }: AboutSectionProps) {
    }
  }, [checkUpdate, hasUpdate, isPortable, resetDismiss, t, updateHandle]);

+  const handleCopyInstallCommands = useCallback(async () => {
+    try {
+      await navigator.clipboard.writeText(ONE_CLICK_INSTALL_COMMANDS);
+      toast.success(t("settings.installCommandsCopied"), { closeButton: true });
+    } catch (error) {
+      console.error("[AboutSection] Failed to copy install commands", error);
+      toast.error(t("settings.installCommandsCopyFailed"));
+    }
+  }, [t]);
+
  const displayVersion = version ?? t("common.unknown");

  return (
-    <section className="space-y-6">
+    <motion.section
+      initial={{ opacity: 0, y: 10 }}
+      animate={{ opacity: 1, y: 0 }}
+      transition={{ duration: 0.3 }}
+      className="space-y-6"
+    >
      <header className="space-y-1">
        <h3 className="text-sm font-medium">{t("common.about")}</h3>
        <p className="text-xs text-muted-foreground">
@@ -161,12 +195,22 @@ export function AboutSection({ isPortable }: AboutSectionProps) {
        </p>
      </header>

-      <div className="rounded-xl border border-border bg-card/50 p-6 space-y-6">
+      <motion.div
+        initial={{ opacity: 0, scale: 0.98 }}
+        animate={{ opacity: 1, scale: 1 }}
+        transition={{ duration: 0.3, delay: 0.1 }}
+        className="rounded-xl border border-border bg-gradient-to-br from-card/80 to-card/40 p-6 space-y-5 shadow-sm"
+      >
        <div className="flex flex-col gap-4 sm:flex-row sm:items-center sm:justify-between">
          <div className="space-y-2">
-            <h4 className="text-lg font-semibold text-foreground">CC Switch</h4>
            <div className="flex items-center gap-2">
-              <Badge variant="outline" className="gap-1.5 bg-background">
+              <Sparkles className="h-5 w-5 text-primary" />
+              <h4 className="text-lg font-semibold text-foreground">
+                CC Switch
+              </h4>
+            </div>
+            <div className="flex items-center gap-2">
+              <Badge variant="outline" className="gap-1.5 bg-background/80">
                <span className="text-muted-foreground">
                  {t("common.version")}
                </span>
@@ -185,15 +229,15 @@ export function AboutSection({ isPortable }: AboutSectionProps) {
            </div>
          </div>

-          <div className="flex flex-wrap items-center gap-2">
+          <div className="flex items-center gap-2">
            <Button
              type="button"
              variant="outline"
              size="sm"
              onClick={handleOpenReleaseNotes}
-              className="h-9"
+              className="h-8 gap-1.5 text-xs"
            >
-              <ExternalLink className="mr-2 h-4 w-4" />
+              <ExternalLink className="h-3.5 w-3.5" />
              {t("settings.releaseNotes")}
            </Button>
            <Button
@@ -201,34 +245,41 @@ export function AboutSection({ isPortable }: AboutSectionProps) {
              size="sm"
              onClick={handleCheckUpdate}
              disabled={isChecking || isDownloading}
-              className="min-w-[140px] h-9"
+              className="h-8 gap-1.5 text-xs"
            >
              {isDownloading ? (
-                <span className="inline-flex items-center gap-2">
-                  <Loader2 className="h-4 w-4 animate-spin" />
+                <>
+                  <Loader2 className="h-3.5 w-3.5 animate-spin" />
                  {t("settings.updating")}
-                </span>
+                </>
              ) : hasUpdate ? (
-                <span className="inline-flex items-center gap-2">
-                  <Download className="h-4 w-4" />
+                <>
+                  <Download className="h-3.5 w-3.5" />
                  {t("settings.updateTo", {
                    version: updateInfo?.availableVersion ?? "",
                  })}
-                </span>
+                </>
              ) : isChecking ? (
-                <span className="inline-flex items-center gap-2">
-                  <RefreshCw className="h-4 w-4 animate-spin" />
+                <>
+                  <RefreshCw className="h-3.5 w-3.5 animate-spin" />
                  {t("settings.checking")}
-                </span>
+                </>
              ) : (
-                t("settings.checkForUpdates")
+                <>
+                  <RefreshCw className="h-3.5 w-3.5" />
+                  {t("settings.checkForUpdates")}
+                </>
              )}
            </Button>
          </div>
        </div>

        {hasUpdate && updateInfo && (
-          <div className="rounded-lg bg-primary/10 border border-primary/20 px-4 py-3 text-sm">
+          <motion.div
+            initial={{ opacity: 0, height: 0 }}
+            animate={{ opacity: 1, height: "auto" }}
+            className="rounded-lg bg-primary/10 border border-primary/20 px-4 py-3 text-sm"
+          >
            <p className="font-medium text-primary mb-1">
              {t("settings.updateAvailable", {
                version: updateInfo.availableVersion,
@@ -239,60 +290,111 @@ export function AboutSection({ isPortable }: AboutSectionProps) {
                {updateInfo.notes}
              </p>
            )}
-          </div>
+          </motion.div>
        )}
-      </div>
+      </motion.div>

      <div className="space-y-3">
-        <h4 className="text-sm font-medium text-muted-foreground px-1">
-          本地环境检查
-        </h4>
+        <div className="flex items-center justify-between px-1">
+          <h3 className="text-sm font-medium">{t("settings.localEnvCheck")}</h3>
+          <Button
+            size="sm"
+            variant="outline"
+            className="h-7 gap-1.5 text-xs"
+            onClick={loadToolVersions}
+            disabled={isLoadingTools}
+          >
+            <RefreshCw
+              className={
+                isLoadingTools ? "h-3.5 w-3.5 animate-spin" : "h-3.5 w-3.5"
+              }
+            />
+            {isLoadingTools ? t("common.refreshing") : t("common.refresh")}
+          </Button>
+        </div>
        <div className="grid gap-3 sm:grid-cols-3">
-          {isLoadingTools
-            ? Array.from({ length: 3 }).map((_, i) => (
-                <div
-                  key={i}
-                  className="h-20 rounded-xl border border-border bg-card/50 animate-pulse"
-                />
-              ))
-            : toolVersions.map((tool) => (
-                <div
-                  key={tool.name}
-                  className="flex flex-col gap-2 rounded-xl border border-border bg-card/50 p-4 transition-colors hover:bg-muted/50"
-                >
-                  <div className="flex items-center justify-between">
-                    <div className="flex items-center gap-2">
-                      <Terminal className="h-4 w-4 text-muted-foreground" />
-                      <span className="text-sm font-medium capitalize">
-                        {tool.name}
-                      </span>
-                    </div>
-                    {tool.version ? (
-                      <div className="flex items-center gap-1.5">
-                        {tool.latest_version &&
-                          tool.version !== tool.latest_version && (
-                            <span className="text-[10px] px-1.5 py-0.5 rounded-full bg-yellow-500/10 text-yellow-600 dark:text-yellow-400 border border-yellow-500/20">
-                              Update: {tool.latest_version}
-                            </span>
-                          )}
-                        <CheckCircle2 className="h-4 w-4 text-green-500" />
-                      </div>
-                    ) : (
-                      <AlertCircle className="h-4 w-4 text-yellow-500" />
-                    )}
+          {["claude", "codex", "gemini"].map((toolName, index) => {
+            const tool = toolVersions.find((item) => item.name === toolName);
+            const displayName = tool?.name ?? toolName;
+            const title = tool?.version || tool?.error || t("common.unknown");
+
+            return (
+              <motion.div
+                key={toolName}
+                initial={{ opacity: 0, y: 10 }}
+                animate={{ opacity: 1, y: 0 }}
+                transition={{ duration: 0.3, delay: 0.15 + index * 0.05 }}
+                whileHover={{ scale: 1.02 }}
+                className="flex flex-col gap-2 rounded-xl border border-border bg-gradient-to-br from-card/80 to-card/40 p-4 shadow-sm transition-colors hover:border-primary/30"
+              >
+                <div className="flex items-center justify-between">
+                  <div className="flex items-center gap-2">
+                    <Terminal className="h-4 w-4 text-muted-foreground" />
+                    <span className="text-sm font-medium capitalize">
+                      {displayName}
+                    </span>
                  </div>
-                  <div className="flex flex-col gap-0.5">
-                    <div
-                      className="text-xs font-mono truncate"
-                      title={tool.version || tool.error || "Unknown"}
-                    >
-                      {tool.version ? tool.version : tool.error || "未安装"}
+                  {isLoadingTools ? (
+                    <Loader2 className="h-4 w-4 animate-spin text-muted-foreground" />
+                  ) : tool?.version ? (
+                    <div className="flex items-center gap-1.5">
+                      {tool.latest_version &&
+                        tool.version !== tool.latest_version && (
+                          <span className="text-[10px] px-1.5 py-0.5 rounded-full bg-yellow-500/10 text-yellow-600 dark:text-yellow-400 border border-yellow-500/20">
+                            {tool.latest_version}
+                          </span>
+                        )}
+                      <CheckCircle2 className="h-4 w-4 text-green-500" />
                    </div>
-                  </div>
+                  ) : (
+                    <AlertCircle className="h-4 w-4 text-yellow-500" />
+                  )}
                </div>
-              ))}
+                <div
+                  className="text-xs font-mono text-muted-foreground truncate"
+                  title={title}
+                >
+                  {isLoadingTools
+                    ? t("common.loading")
+                    : tool?.version
+                      ? tool.version
+                      : tool?.error || t("common.notInstalled")}
+                </div>
+              </motion.div>
+            );
+          })}
        </div>
      </div>
-    </section>
+
+      <motion.div
+        initial={{ opacity: 0, y: 10 }}
+        animate={{ opacity: 1, y: 0 }}
+        transition={{ duration: 0.3, delay: 0.3 }}
+        className="space-y-3"
+      >
+        <h3 className="text-sm font-medium px-1">
+          {t("settings.oneClickInstall")}
+        </h3>
+        <div className="rounded-xl border border-border bg-gradient-to-br from-card/80 to-card/40 p-4 space-y-3 shadow-sm">
+          <div className="flex items-center justify-between gap-2">
+            <p className="text-xs text-muted-foreground">
+              {t("settings.oneClickInstallHint")}
+            </p>
+            <Button
+              size="sm"
+              variant="outline"
+              onClick={handleCopyInstallCommands}
+              className="h-7 gap-1.5 text-xs"
+            >
+              <Copy className="h-3.5 w-3.5" />
+              {t("common.copy")}
+            </Button>
+          </div>
+          <pre className="text-xs font-mono bg-background/80 px-3 py-2.5 rounded-lg border border-border/60 overflow-x-auto">
+            {ONE_CLICK_INSTALL_COMMANDS}
+          </pre>
+        </div>
+      </motion.div>
+    </motion.section>
  );
 }
@@ -7,7 +7,9 @@ import {
  Coins,
  Database,
  Server,
+  ChevronDown,
 } from "lucide-react";
+import * as AccordionPrimitive from "@radix-ui/react-accordion";
 import { toast } from "sonner";
 import {
  Dialog,
@@ -35,6 +37,7 @@ import { ProxyPanel } from "@/components/proxy";
 import { PricingConfigPanel } from "@/components/usage/PricingConfigPanel";
 import { ModelTestConfigPanel } from "@/components/usage/ModelTestConfigPanel";
 import { AutoFailoverConfigPanel } from "@/components/proxy/AutoFailoverConfigPanel";
+import { FailoverQueueManager } from "@/components/proxy/FailoverQueueManager";
 import { UsageDashboard } from "@/components/usage/UsageDashboard";
 import { useSettings } from "@/hooks/useSettings";
 import { useImportExport } from "@/hooks/useImportExport";
@@ -135,7 +138,7 @@ export function SettingsPage({
  const handleRestartNow = useCallback(async () => {
    setShowRestartPrompt(false);
    if (import.meta.env.DEV) {
-      toast.success(t("settings.devModeRestartHint"));
+      toast.success(t("settings.devModeRestartHint"), { closeButton: true });
      closeAfterSave();
      return;
    }
@@ -174,8 +177,8 @@ export function SettingsPage({

  const {
    isRunning,
-    start: startProxy,
-    stop: stopProxy,
+    startProxyServer,
+    stopWithRestore,
    isPending: isProxyPending,
  } = useProxyStatus();
  const [failoverEnabled, setFailoverEnabled] = useState(true);
@@ -183,9 +186,9 @@ export function SettingsPage({
  const handleToggleProxy = async (checked: boolean) => {
    try {
      if (!checked) {
-        await stopProxy();
+        await stopWithRestore();
      } else {
-        await startProxy();
+        await startProxyServer();
      }
    } catch (error) {
      console.error("Toggle proxy failed:", error);
@@ -278,10 +281,10 @@ export function SettingsPage({

                    <AccordionItem
                      value="proxy"
-                      className="rounded-xl glass-card overflow-hidden"
+                      className="rounded-xl glass-card overflow-hidden [&[data-state=open]>.accordion-header]:bg-muted/50"
                    >
-                      <AccordionTrigger className="px-6 py-4 hover:no-underline hover:bg-muted/50 data-[state=open]:bg-muted/50">
-                        <div className="flex flex-1 items-center justify-between pr-4">
+                      <AccordionPrimitive.Header className="accordion-header flex items-center justify-between px-6 py-4 hover:bg-muted/50">
+                        <AccordionPrimitive.Trigger className="flex flex-1 items-center justify-between hover:no-underline [&[data-state=open]>svg]:rotate-180">
                          <div className="flex items-center gap-3">
                            <Server className="h-5 w-5 text-green-500" />
                            <div className="text-left">
@@ -293,27 +296,26 @@ export function SettingsPage({
                              </p>
                            </div>
                          </div>
-                          <div
-                            className="flex items-center gap-4"
-                            onClick={(e) => e.stopPropagation()}
+                          <ChevronDown className="h-4 w-4 shrink-0 transition-transform duration-200" />
+                        </AccordionPrimitive.Trigger>
+
+                        <div className="flex items-center gap-4 pl-4">
+                          <Badge
+                            variant={isRunning ? "default" : "secondary"}
+                            className="gap-1.5 h-6"
                          >
-                            <Badge
-                              variant={isRunning ? "default" : "secondary"}
-                              className="gap-1.5 h-6"
-                            >
-                              <Activity
-                                className={`h-3 w-3 ${isRunning ? "animate-pulse" : ""}`}
-                              />
-                              {isRunning ? "运行中" : "已停止"}
-                            </Badge>
-                            <Switch
-                              checked={isRunning}
-                              onCheckedChange={handleToggleProxy}
-                              disabled={isProxyPending}
+                            <Activity
+                              className={`h-3 w-3 ${isRunning ? "animate-pulse" : ""}`}
                            />
-                          </div>
+                            {isRunning ? "运行中" : "已停止"}
+                          </Badge>
+                          <Switch
+                            checked={isRunning}
+                            onCheckedChange={handleToggleProxy}
+                            disabled={isProxyPending}
+                          />
                        </div>
-                      </AccordionTrigger>
+                      </AccordionPrimitive.Header>
                      <AccordionContent className="px-6 pb-6 pt-0 border-t border-border/50">
                        <ProxyPanel />
                      </AccordionContent>
@@ -343,10 +345,10 @@ export function SettingsPage({

                    <AccordionItem
                      value="failover"
-                      className="rounded-xl glass-card overflow-hidden"
+                      className="rounded-xl glass-card overflow-hidden [&[data-state=open]>.accordion-header]:bg-muted/50"
                    >
-                      <AccordionTrigger className="px-6 py-4 hover:no-underline hover:bg-muted/50 data-[state=open]:bg-muted/50">
-                        <div className="flex flex-1 items-center justify-between pr-4">
+                      <AccordionPrimitive.Header className="accordion-header flex items-center justify-between px-6 py-4 hover:bg-muted/50">
+                        <AccordionPrimitive.Trigger className="flex flex-1 items-center justify-between hover:no-underline [&[data-state=open]>svg]:rotate-180">
                          <div className="flex items-center gap-3">
                            <Activity className="h-5 w-5 text-orange-500" />
                            <div className="text-left">
@@ -354,29 +356,70 @@ export function SettingsPage({
                                自动故障转移
                              </h3>
                              <p className="text-sm text-muted-foreground font-normal">
-                                配置自动故障转移和熔断策略
+                                配置故障转移队列和熔断策略
                              </p>
                            </div>
                          </div>
-                          <div
-                            className="flex items-center gap-4"
-                            onClick={(e) => e.stopPropagation()}
-                          >
-                            <div className="flex items-center gap-2">
-                              {/* Removed status text as requested */}
-                              <Switch
-                                checked={failoverEnabled}
-                                onCheckedChange={setFailoverEnabled}
-                              />
+                          <ChevronDown className="h-4 w-4 shrink-0 transition-transform duration-200" />
+                        </AccordionPrimitive.Trigger>
+
+                        <div className="flex items-center gap-2 pl-4">
+                          <Switch
+                            checked={failoverEnabled}
+                            onCheckedChange={setFailoverEnabled}
+                          />
+                        </div>
+                      </AccordionPrimitive.Header>
+                      <AccordionContent className="px-6 pb-6 pt-4 border-t border-border/50">
+                        <div className="space-y-6">
+                          {/* 故障转移队列管理 */}
+                          <div className="space-y-4">
+                            <div>
+                              <h4 className="text-sm font-semibold">
+                                {t("proxy.failoverQueue.title", "故障转移队列")}
+                              </h4>
+                              <p className="text-xs text-muted-foreground">
+                                {t(
+                                  "proxy.failoverQueue.description",
+                                  "管理各应用的供应商故障转移顺序",
+                                )}
+                              </p>
                            </div>
+                            <Tabs defaultValue="claude" className="w-full">
+                              <TabsList className="grid w-full grid-cols-3">
+                                <TabsTrigger value="claude">Claude</TabsTrigger>
+                                <TabsTrigger value="codex">Codex</TabsTrigger>
+                                <TabsTrigger value="gemini">Gemini</TabsTrigger>
+                              </TabsList>
+                              <TabsContent value="claude" className="mt-4">
+                                <FailoverQueueManager
+                                  appType="claude"
+                                  disabled={!failoverEnabled}
+                                />
+                              </TabsContent>
+                              <TabsContent value="codex" className="mt-4">
+                                <FailoverQueueManager
+                                  appType="codex"
+                                  disabled={!failoverEnabled}
+                                />
+                              </TabsContent>
+                              <TabsContent value="gemini" className="mt-4">
+                                <FailoverQueueManager
+                                  appType="gemini"
+                                  disabled={!failoverEnabled}
+                                />
+                              </TabsContent>
+                            </Tabs>
+                          </div>
+
+                          {/* 熔断器配置 */}
+                          <div className="border-t border-border/50 pt-6">
+                            <AutoFailoverConfigPanel
+                              enabled={failoverEnabled}
+                              onEnabledChange={setFailoverEnabled}
+                            />
                          </div>
                        </div>
-                      </AccordionTrigger>
-                      <AccordionContent className="px-6 pb-6 pt-4 border-t border-border/50">
-                        <AutoFailoverConfigPanel
-                          enabled={failoverEnabled}
-                          onEnabledChange={setFailoverEnabled}
-                        />
                      </AccordionContent>
                    </AccordionItem>

@@ -103,7 +103,9 @@ export const SkillsPage = forwardRef<SkillsPageHandle, SkillsPageProps>(
    const handleInstall = async (directory: string) => {
      try {
        await skillsApi.install(directory, selectedApp);
-        toast.success(t("skills.installSuccess", { name: directory }));
+        toast.success(t("skills.installSuccess", { name: directory }), {
+          closeButton: true,
+        });
        await loadSkills();
      } catch (error) {
        const errorMessage =
@@ -132,7 +134,9 @@ export const SkillsPage = forwardRef<SkillsPageHandle, SkillsPageProps>(
    const handleUninstall = async (directory: string) => {
      try {
        await skillsApi.uninstall(directory, selectedApp);
-        toast.success(t("skills.uninstallSuccess", { name: directory }));
+        toast.success(t("skills.uninstallSuccess", { name: directory }), {
+          closeButton: true,
+        });
        await loadSkills();
      } catch (error) {
        const errorMessage =
@@ -180,12 +184,15 @@ export const SkillsPage = forwardRef<SkillsPageHandle, SkillsPageProps>(
          name: repo.name,
          count: repoSkillCount,
        }),
+        { closeButton: true },
      );
    };

    const handleRemoveRepo = async (owner: string, name: string) => {
      await skillsApi.removeRepo(owner, name);
-      toast.success(t("skills.repo.removeSuccess", { owner, name }));
+      toast.success(t("skills.repo.removeSuccess", { owner, name }), {
+        closeButton: true,
+      });
      await Promise.all([loadRepos(), loadSkills()]);
    };

@@ -7,9 +7,9 @@ import { Alert, AlertDescription } from "@/components/ui/alert";
 import { Save, Loader2 } from "lucide-react";
 import { toast } from "sonner";
 import {
-  getModelTestConfig,
-  saveModelTestConfig,
-  type ModelTestConfig,
+  getStreamCheckConfig,
+  saveStreamCheckConfig,
+  type StreamCheckConfig,
 } from "@/lib/api/model-test";

 export function ModelTestConfigPanel() {
@@ -17,12 +17,13 @@ export function ModelTestConfigPanel() {
  const [isLoading, setIsLoading] = useState(true);
  const [isSaving, setIsSaving] = useState(false);
  const [error, setError] = useState<string | null>(null);
-  const [config, setConfig] = useState<ModelTestConfig>({
+  const [config, setConfig] = useState<StreamCheckConfig>({
+    timeoutSecs: 45,
+    maxRetries: 2,
+    degradedThresholdMs: 6000,
    claudeModel: "claude-haiku-4-5-20251001",
-    codexModel: "gpt-5.1-low",
-    geminiModel: "gemini-3-pro-low",
-    testPrompt: "ping",
-    timeoutSecs: 15,
+    codexModel: "gpt-5.1-codex@low",
+    geminiModel: "gemini-3-pro-preview",
  });

  useEffect(() => {
@@ -33,7 +34,7 @@ export function ModelTestConfigPanel() {
    try {
      setIsLoading(true);
      setError(null);
-      const data = await getModelTestConfig();
+      const data = await getStreamCheckConfig();
      setConfig(data);
    } catch (e) {
      setError(String(e));
@@ -45,11 +46,13 @@ export function ModelTestConfigPanel() {
  async function handleSave() {
    try {
      setIsSaving(true);
-      await saveModelTestConfig(config);
-      toast.success(t("modelTest.configSaved", "模型测试配置已保存"));
+      await saveStreamCheckConfig(config);
+      toast.success(t("streamCheck.configSaved", "健康检查配置已保存"), {
+        closeButton: true,
+      });
    } catch (e) {
      toast.error(
-        t("modelTest.configSaveFailed", "保存失败") + ": " + String(e),
+        t("streamCheck.configSaveFailed", "保存失败") + ": " + String(e),
      );
    } finally {
      setIsSaving(false);
@@ -65,95 +68,126 @@ export function ModelTestConfigPanel() {
  }

  return (
-    <div className="space-y-4">
+    <div className="space-y-6">
      {error && (
        <Alert variant="destructive">
          <AlertDescription>{error}</AlertDescription>
        </Alert>
      )}

-      <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
-        <div className="space-y-2">
-          <Label htmlFor="claudeModel">
-            {t("modelTest.claudeModel", "Claude 测试模型")}
-          </Label>
-          <Input
-            id="claudeModel"
-            value={config.claudeModel}
-            onChange={(e) =>
-              setConfig({ ...config, claudeModel: e.target.value })
-            }
-            placeholder="claude-haiku-4-5-20251001"
-          />
-        </div>
+      {/* 测试模型配置 */}
+      <div className="space-y-4">
+        <h4 className="text-sm font-medium text-muted-foreground">
+          {t("streamCheck.testModels", "测试模型")}
+        </h4>
+        <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
+          <div className="space-y-2">
+            <Label htmlFor="claudeModel">
+              {t("streamCheck.claudeModel", "Claude 模型")}
+            </Label>
+            <Input
+              id="claudeModel"
+              value={config.claudeModel}
+              onChange={(e) =>
+                setConfig({ ...config, claudeModel: e.target.value })
+              }
+              placeholder="claude-3-5-haiku-latest"
+            />
+          </div>

-        <div className="space-y-2">
-          <Label htmlFor="codexModel">
-            {t("modelTest.codexModel", "Codex 测试模型")}
-          </Label>
-          <Input
-            id="codexModel"
-            value={config.codexModel}
-            onChange={(e) =>
-              setConfig({ ...config, codexModel: e.target.value })
-            }
-            placeholder="gpt-5.1-low"
-          />
-        </div>
+          <div className="space-y-2">
+            <Label htmlFor="codexModel">
+              {t("streamCheck.codexModel", "Codex 模型")}
+            </Label>
+            <Input
+              id="codexModel"
+              value={config.codexModel}
+              onChange={(e) =>
+                setConfig({ ...config, codexModel: e.target.value })
+              }
+              placeholder="gpt-4o-mini"
+            />
+          </div>

-        <div className="space-y-2">
-          <Label htmlFor="geminiModel">
-            {t("modelTest.geminiModel", "Gemini 测试模型")}
-          </Label>
-          <Input
-            id="geminiModel"
-            value={config.geminiModel}
-            onChange={(e) =>
-              setConfig({ ...config, geminiModel: e.target.value })
-            }
-            placeholder="gemini-3-pro-low"
-          />
+          <div className="space-y-2">
+            <Label htmlFor="geminiModel">
+              {t("streamCheck.geminiModel", "Gemini 模型")}
+            </Label>
+            <Input
+              id="geminiModel"
+              value={config.geminiModel}
+              onChange={(e) =>
+                setConfig({ ...config, geminiModel: e.target.value })
+              }
+              placeholder="gemini-1.5-flash"
+            />
+          </div>
        </div>
      </div>

-      <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
-        <div className="space-y-2">
-          <Label htmlFor="testPrompt">
-            {t("modelTest.testPrompt", "测试提示词")}
-          </Label>
-          <Input
-            id="testPrompt"
-            value={config.testPrompt}
-            onChange={(e) =>
-              setConfig({ ...config, testPrompt: e.target.value })
-            }
-            placeholder="ping"
-          />
-          <p className="text-xs text-muted-foreground">
-            {t(
-              "modelTest.testPromptHint",
-              "发送给模型的测试消息，建议使用简短内容以减少 token 消耗",
-            )}
-          </p>
-        </div>
+      {/* 检查参数配置 */}
+      <div className="space-y-4">
+        <h4 className="text-sm font-medium text-muted-foreground">
+          {t("streamCheck.checkParams", "检查参数")}
+        </h4>
+        <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
+          <div className="space-y-2">
+            <Label htmlFor="timeoutSecs">
+              {t("streamCheck.timeout", "超时时间（秒）")}
+            </Label>
+            <Input
+              id="timeoutSecs"
+              type="number"
+              min={10}
+              max={120}
+              value={config.timeoutSecs}
+              onChange={(e) =>
+                setConfig({
+                  ...config,
+                  timeoutSecs: parseInt(e.target.value) || 45,
+                })
+              }
+            />
+          </div>

-        <div className="space-y-2">
-          <Label htmlFor="timeoutSecs">
-            {t("modelTest.timeout", "超时时间（秒）")}
-          </Label>
-          <Input
-            id="timeoutSecs"
-            type="number"
-            min={5}
-            max={60}
-            value={config.timeoutSecs}
-            onChange={(e) =>
-              setConfig({
-                ...config,
-                timeoutSecs: parseInt(e.target.value) || 15,
-              })
-            }
-          />
+          <div className="space-y-2">
+            <Label htmlFor="maxRetries">
+              {t("streamCheck.maxRetries", "最大重试次数")}
+            </Label>
+            <Input
+              id="maxRetries"
+              type="number"
+              min={0}
+              max={5}
+              value={config.maxRetries}
+              onChange={(e) =>
+                setConfig({
+                  ...config,
+                  maxRetries: parseInt(e.target.value) || 2,
+                })
+              }
+            />
+          </div>
+
+          <div className="space-y-2">
+            <Label htmlFor="degradedThresholdMs">
+              {t("streamCheck.degradedThreshold", "降级阈值（毫秒）")}
+            </Label>
+            <Input
+              id="degradedThresholdMs"
+              type="number"
+              min={1000}
+              max={30000}
+              step={1000}
+              value={config.degradedThresholdMs}
+              onChange={(e) =>
+                setConfig({
+                  ...config,
+                  degradedThresholdMs: parseInt(e.target.value) || 6000,
+                })
+              }
+            />
+          </div>
        </div>
      </div>

@@ -76,6 +76,7 @@ export function PricingEditModal({
        isNew
          ? t("usage.pricingAdded", "定价已添加")
          : t("usage.pricingUpdated", "定价已更新"),
+        { closeButton: true },
      );

      onClose();
@@ -80,7 +80,7 @@ export const codexProviderPresets: CodexProviderPreset[] = [
  {
    name: "Azure OpenAI",
    websiteUrl:
-      "https://learn.microsoft.com/azure/ai-services/openai/how-to/overview",
+      "https://learn.microsoft.com/en-us/azure/ai-foundry/openai/how-to/codex",
    category: "third_party",
    isOfficial: true,
    auth: generateThirdPartyAuth(""),
@@ -87,6 +87,7 @@ export function useDragSort(providers: Record<string, Provider>, appId: AppId) {
          t("provider.sortUpdated", {
            defaultValue: "排序已更新",
          }),
+          { closeButton: true },
        );
      } catch (error) {
        console.error("Failed to update provider sort order", error);
@@ -113,6 +113,7 @@ export function useImportExport(
          t("settings.importSuccess", {
            defaultValue: "配置导入成功",
          }),
+          { closeButton: true },
        );

        successTimerRef.current = window.setTimeout(() => {
@@ -170,6 +171,7 @@ export function useImportExport(
          t("settings.configExported", {
            defaultValue: "配置已导出",
          }) + `\n${displayPath}`,
+          { closeButton: true },
        );
      } else {
        toast.error(
@@ -1,66 +0,0 @@
-import { useState, useCallback } from "react";
-import { toast } from "sonner";
-import { useTranslation } from "react-i18next";
-import { testProviderModel, type ModelTestResult } from "@/lib/api/model-test";
-import type { AppId } from "@/lib/api";
-
-export function useModelTest(appId: AppId) {
-  const { t } = useTranslation();
-  const [testingIds, setTestingIds] = useState<Set<string>>(new Set());
-
-  const testProvider = useCallback(
-    async (
-      providerId: string,
-      providerName: string,
-    ): Promise<ModelTestResult | null> => {
-      setTestingIds((prev) => new Set(prev).add(providerId));
-
-      try {
-        const result = await testProviderModel(appId, providerId);
-
-        if (result.success) {
-          toast.success(
-            t("modelTest.success", {
-              name: providerName,
-              time: result.responseTimeMs,
-              defaultValue: `${providerName} 测试成功 (${result.responseTimeMs}ms)`,
-            }),
-          );
-        } else {
-          toast.error(
-            t("modelTest.failed", {
-              name: providerName,
-              error: result.message,
-              defaultValue: `${providerName} 测试失败: ${result.message}`,
-            }),
-          );
-        }
-
-        return result;
-      } catch (e) {
-        toast.error(
-          t("modelTest.error", {
-            name: providerName,
-            error: String(e),
-            defaultValue: `${providerName} 测试出错: ${String(e)}`,
-          }),
-        );
-        return null;
-      } finally {
-        setTestingIds((prev) => {
-          const next = new Set(prev);
-          next.delete(providerId);
-          return next;
-        });
-      }
-    },
-    [appId, t],
-  );
-
-  const isTesting = useCallback(
-    (providerId: string) => testingIds.has(providerId),
-    [testingIds],
-  );
-
-  return { testProvider, isTesting };
-}
@@ -36,7 +36,7 @@ export function usePromptActions(appId: AppId) {
      try {
        await promptsApi.upsertPrompt(appId, id, prompt);
        await reload();
-        toast.success(t("prompts.saveSuccess"));
+        toast.success(t("prompts.saveSuccess"), { closeButton: true });
      } catch (error) {
        toast.error(t("prompts.saveFailed"));
        throw error;
@@ -50,7 +50,7 @@ export function usePromptActions(appId: AppId) {
      try {
        await promptsApi.deletePrompt(appId, id);
        await reload();
-        toast.success(t("prompts.deleteSuccess"));
+        toast.success(t("prompts.deleteSuccess"), { closeButton: true });
      } catch (error) {
        toast.error(t("prompts.deleteFailed"));
        throw error;
@@ -64,7 +64,7 @@ export function usePromptActions(appId: AppId) {
      try {
        await promptsApi.enablePrompt(appId, id);
        await reload();
-        toast.success(t("prompts.enableSuccess"));
+        toast.success(t("prompts.enableSuccess"), { closeButton: true });
      } catch (error) {
        toast.error(t("prompts.enableFailed"));
        throw error;
@@ -104,14 +104,14 @@ export function usePromptActions(appId: AppId) {
      try {
        if (enabled) {
          await promptsApi.enablePrompt(appId, id);
-          toast.success(t("prompts.enableSuccess"));
+          toast.success(t("prompts.enableSuccess"), { closeButton: true });
        } else {
          // 禁用提示词 - 需要后端支持
          await promptsApi.upsertPrompt(appId, id, {
            ...prompts[id],
            enabled: false,
          });
-          toast.success(t("prompts.disableSuccess"));
+          toast.success(t("prompts.disableSuccess"), { closeButton: true });
        }
        await reload();
      } catch (error) {
@@ -130,7 +130,7 @@ export function usePromptActions(appId: AppId) {
    try {
      const id = await promptsApi.importFromFile(appId);
      await reload();
-      toast.success(t("prompts.importSuccess"));
+      toast.success(t("prompts.importSuccess"), { closeButton: true });
      return id;
    } catch (error) {
      toast.error(t("prompts.importFailed"));
@@ -119,6 +119,7 @@ export function useProviderActions(activeApp: AppId) {
          t("provider.usageSaved", {
            defaultValue: "用量查询配置已保存",
          }),
+          { closeButton: true },
        );
      } catch (error) {
        const detail =
@@ -24,7 +24,7 @@ export function useProxyConfig() {
    mutationFn: (newConfig: ProxyConfig) =>
      invoke("update_proxy_config", { config: newConfig }),
    onSuccess: () => {
-      toast.success("代理配置已保存");
+      toast.success("代理配置已保存", { closeButton: true });
      queryClient.invalidateQueries({ queryKey: ["proxyConfig"] });
      queryClient.invalidateQueries({ queryKey: ["proxyStatus"] });
    },
@@ -5,13 +5,20 @@
 import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
 import { invoke } from "@tauri-apps/api/core";
 import { toast } from "sonner";
-import type { ProxyStatus, ProxyServerInfo } from "@/types/proxy";
+import { useTranslation } from "react-i18next";
+import type {
+  ProxyStatus,
+  ProxyServerInfo,
+  ProxyTakeoverStatus,
+} from "@/types/proxy";
+import { extractErrorMessage } from "@/utils/errorUtils";

 /**
 * 代理服务状态管理
 */
 export function useProxyStatus() {
  const queryClient = useQueryClient();
+  const { t } = useTranslation();

  // 查询状态（自动轮询）
  const { data: status, isLoading } = useQuery({
@@ -23,27 +30,111 @@ export function useProxyStatus() {
    placeholderData: (previousData) => previousData,
  });

-  // 启动服务器
-  const startMutation = useMutation({
+  // 查询各应用接管状态
+  const { data: takeoverStatus } = useQuery({
+    queryKey: ["proxyTakeoverStatus"],
+    queryFn: () => invoke<ProxyTakeoverStatus>("get_proxy_takeover_status"),
+    placeholderData: (previousData) => previousData,
+  });
+
+  // 启动服务器（总开关：仅启动服务，不接管）
+  const startProxyServerMutation = useMutation({
    mutationFn: () => invoke<ProxyServerInfo>("start_proxy_server"),
    onSuccess: (info) => {
-      toast.success(`代理服务已启动 - ${info.address}:${info.port}`);
+      toast.success(
+        t("proxy.server.started", {
+          defaultValue: `代理服务已启动 - ${info.address}:${info.port}`,
+        }),
+        { closeButton: true },
+      );
      queryClient.invalidateQueries({ queryKey: ["proxyStatus"] });
    },
    onError: (error: Error) => {
-      toast.error(`启动失败: ${error.message}`);
+      const detail = extractErrorMessage(error) || "未知错误";
+      toast.error(
+        t("proxy.server.startFailed", {
+          defaultValue: `启动代理服务失败: ${detail}`,
+        }),
+      );
    },
  });

-  // 停止服务器
-  const stopMutation = useMutation({
-    mutationFn: () => invoke("stop_proxy_server"),
+  // 停止服务器（总开关关闭：强制恢复所有已接管的 Live 配置）
+  const stopWithRestoreMutation = useMutation({
+    mutationFn: () => invoke("stop_proxy_with_restore"),
+    onSuccess: () => {
+      toast.success(
+        t("proxy.stoppedWithRestore", {
+          defaultValue: "代理服务已关闭，已恢复所有接管配置",
+        }),
+        { closeButton: true },
+      );
+      queryClient.invalidateQueries({ queryKey: ["proxyStatus"] });
+      queryClient.invalidateQueries({ queryKey: ["proxyTakeoverStatus"] });
+      // 清除所有供应商健康状态缓存（后端已清空数据库记录）
+      queryClient.invalidateQueries({ queryKey: ["providerHealth"] });
+    },
+    onError: (error: Error) => {
+      const detail = extractErrorMessage(error) || "未知错误";
+      toast.error(
+        t("proxy.stopWithRestoreFailed", {
+          defaultValue: `停止失败: ${detail}`,
+        }),
+      );
+    },
+  });
+
+  // 按应用开启/关闭接管
+  const setTakeoverForAppMutation = useMutation({
+    mutationFn: ({ appType, enabled }: { appType: string; enabled: boolean }) =>
+      invoke("set_proxy_takeover_for_app", { appType, enabled }),
+    onSuccess: (_data, variables) => {
+      const appLabel =
+        variables.appType === "claude"
+          ? "Claude"
+          : variables.appType === "codex"
+            ? "Codex"
+            : "Gemini";
+
+      toast.success(
+        variables.enabled
+          ? t("proxy.takeover.enabled", {
+              defaultValue: `已接管 ${appLabel} 配置（请求将走本地代理）`,
+            })
+          : t("proxy.takeover.disabled", {
+              defaultValue: `已恢复 ${appLabel} 配置`,
+            }),
+        { closeButton: true },
+      );
+
+      queryClient.invalidateQueries({ queryKey: ["proxyStatus"] });
+      queryClient.invalidateQueries({ queryKey: ["proxyTakeoverStatus"] });
+    },
+    onError: (error: Error) => {
+      const detail = extractErrorMessage(error) || "未知错误";
+      toast.error(
+        t("proxy.takeover.failed", {
+          defaultValue: `操作失败: ${detail}`,
+        }),
+      );
+    },
+  });
+
+  // 代理模式切换供应商（热切换）
+  const switchProxyProviderMutation = useMutation({
+    mutationFn: ({
+      appType,
+      providerId,
+    }: {
+      appType: string;
+      providerId: string;
+    }) => invoke("switch_proxy_provider", { appType, providerId }),
    onSuccess: () => {
-      toast.success("代理服务已停止");
      queryClient.invalidateQueries({ queryKey: ["proxyStatus"] });
    },
    onError: (error: Error) => {
-      toast.error(`停止失败: ${error.message}`);
+      const detail = extractErrorMessage(error) || "未知错误";
+      toast.error(`切换失败: ${detail}`);
    },
  });

@@ -56,15 +147,46 @@ export function useProxyStatus() {
    }
  };

+  // 检查接管状态
+  const checkTakeoverActive = async () => {
+    try {
+      return await invoke<boolean>("is_live_takeover_active");
+    } catch {
+      return false;
+    }
+  };
+
  return {
    status,
    isLoading,
    isRunning: status?.running || false,
-    start: startMutation.mutateAsync,
-    stop: stopMutation.mutateAsync,
+    takeoverStatus,
+    isTakeoverActive:
+      takeoverStatus?.claude ||
+      takeoverStatus?.codex ||
+      takeoverStatus?.gemini ||
+      false,
+
+    // 启动/停止（总开关）
+    startProxyServer: startProxyServerMutation.mutateAsync,
+    stopWithRestore: stopWithRestoreMutation.mutateAsync,
+
+    // 按应用接管开关
+    setTakeoverForApp: setTakeoverForAppMutation.mutateAsync,
+
+    // 代理模式下切换供应商
+    switchProxyProvider: switchProxyProviderMutation.mutateAsync,
+
+    // 状态检查
    checkRunning,
-    isStarting: startMutation.isPending,
-    isStopping: stopMutation.isPending,
-    isPending: startMutation.isPending || stopMutation.isPending,
+    checkTakeoverActive,
+
+    // 加载状态
+    isStarting: startProxyServerMutation.isPending,
+    isStopping: stopWithRestoreMutation.isPending,
+    isPending:
+      startProxyServerMutation.isPending ||
+      stopWithRestoreMutation.isPending ||
+      setTakeoverForAppMutation.isPending,
  };
 }
--- a/Show More
+++ b/Show More