Feat/provider individual config (#663)

* refactor(ui): simplify UpdateBadge to minimal dot indicator

* feat(provider): add individual test and proxy config for providers

Add support for provider-specific model test and proxy configurations:

- Add ProviderTestConfig and ProviderProxyConfig types in Rust and TypeScript
- Create ProviderAdvancedConfig component with collapsible panels
- Update stream_check service to merge provider config with global config
- Proxy config UI follows global proxy style (single URL input)

Provider-level configs stored in meta field, no database schema changes needed.

* feat(ui): add failover toggle and improve proxy controls

- Add FailoverToggle component with slide animation
- Simplify ProxyToggle style to match FailoverToggle
- Add usage statistics button when proxy is active
- Fix i18n parameter passing for failover messages
- Add missing failover translation keys (inQueue, addQueue, priority)
- Replace AboutSection icon with app logo

* fix(proxy): support system proxy fallback and provider-level proxy config

- Remove no_proxy() calls in http_client.rs to allow system proxy fallback
- Add get_for_provider() to build HTTP client with provider-specific proxy
- Update forwarder.rs and stream_check.rs to use provider proxy config
- Fix EditProviderDialog.tsx to include provider.meta in useMemo deps
- Add useEffect in ProviderAdvancedConfig.tsx to sync expand state

Fixes #636
Fixes #583

* fix(ui): sync toast theme with app setting

* feat(settings): add log config management

Fixes #612
Fixes #514

* fix(proxy): increase request body size limit to 200MB

Fixes #666

* docs(proxy): update timeout config descriptions and defaults

Fixes #612

* fix(proxy): filter x-goog-api-key header to prevent duplication

* fix(proxy): prevent proxy recursion when system proxy points to localhost

Detect if HTTP_PROXY, HTTPS_PROXY, or ALL_PROXY environment variables
point to loopback addresses (localhost, 127.0.0.1), and bypass system
proxy in such cases to avoid infinite request loops.

* fix(i18n): add providerAdvanced i18n keys and fix failover toast parameter

- Add providerAdvanced.* i18n keys to en.json, zh.json, and ja.json
- Fix failover toggleFailed toast to pass detail parameter
- Remove Chinese fallback text from UI for English/Japanese users

* fix(tray): restore tray-provider events and enable Auto failover properly

- Emit provider-switched event on tray provider click (backward compatibility)
- Auto button now: starts proxy, takes over live config, enables failover

* fix(log): enable dynamic log level and single file mode

- Initialize log at Trace level for dynamic adjustment
- Change rotation strategy to KeepSome(1) for single file
- Set max file size to 1GB
- Delete old log file on startup for clean start

* fix(tray): fix clippy uninlined format args warning

Use inline format arguments: {app_type_str} instead of {}

* fix(provider): allow typing :// in endpoint URL inputs

Change input type from "url" to "text" to prevent browser
URL validation from blocking :// input.

Closes #681

* fix(stream-check): use Gemini native streaming API format

- Change endpoint from OpenAI-compatible to native streamGenerateContent
- Add alt=sse parameter for SSE format response
- Use x-goog-api-key header instead of Bearer token
- Convert request body to Gemini contents/parts format

* feat(proxy): add request logging for debugging

Add debug logs for outgoing requests including URL and body content
with byte size, matching the existing response logging format.

* fix(log): prevent usize underflow in KeepSome rotation strategy

KeepSome(n) internally computes n-2, so n=1 causes underflow.
Use KeepSome(2) as the minimum safe value.

src-tauri/src/proxy/forwarder.rs

@@ -28,6 +28,7 @@ const HEADER_BLACKLIST: &[&str] = &[
     // 认证类（会被覆盖）
     "authorization",
     "x-api-key",
+    "x-goog-api-key",
     // 连接类（由 HTTP 客户端管理）
     "host",
     "content-length",
@@ -585,8 +586,9 @@ impl RequestForwarder {
         // 默认使用空白名单，过滤所有 _ 前缀字段
         let filtered_body = filter_private_params_with_whitelist(request_body, &[]);
 
-        // 每次请求时获取最新的全局 HTTP 客户端（支持热更新代理配置）
-        let client = super::http_client::get();
+        // 获取 HTTP 客户端：优先使用供应商单独代理配置，否则使用全局客户端
+        let proxy_config = provider.meta.as_ref().and_then(|m| m.proxy_config.as_ref());
+        let client = super::http_client::get_for_provider(proxy_config);
         let mut request = client.post(&url);
 
         // 只有当 timeout > 0 时才设置请求超时
@@ -662,6 +664,17 @@ impl RequestForwarder {
             request = request.header("anthropic-version", version_str);
         }
 
+        // 输出请求信息日志
+        let tag = adapter.name();
+        log::debug!("[{tag}] >>> 请求 URL: {url}");
+        if let Ok(body_str) = serde_json::to_string(&filtered_body) {
+            log::debug!(
+                "[{tag}] >>> 请求体内容 ({}字节): {}",
+                body_str.len(),
+                body_str
+            );
+        }
+
         // 发送请求
         let response = request.json(&filtered_body).send().await.map_err(|e| {
             if e.is_timeout() {