feat(deeplink): 深链支持用量查询配置 (#400)

## 新增功能
- 深链导入支持用量查询配置参数：
  - `usageEnabled`: 是否启用用量查询
  - `usageScript`: Base64 编码的用量查询脚本
  - `usageApiKey`: 用量查询专用 API Key
  - `usageBaseUrl`: 用量查询专用 Base URL
  - `usageAccessToken`: 访问令牌（NewAPI 模板）
  - `usageUserId`: 用户 ID（NewAPI 模板）
  - `usageAutoInterval`: 自动查询间隔（分钟）

## 修改文件
- **mod.rs**: DeepLinkImportRequest 结构体添加用量查询字段
- **parser.rs**: 解析 URL 中的用量查询参数
- **provider.rs**: 构建 ProviderMeta 包含 UsageScript 配置
- **deeplink.ts**: 添加 TypeScript 类型定义
- **DeepLinkImportDialog.tsx**: 确认对话框显示用量查询配置

## Bug 修复
- **formatters.ts**: 修复 formatJSON() 格式化时删除 "env" 键的问题

## 深链格式示例
```
ccswitch://v1/import?resource=provider&app=claude&name=xxx&usageEnabled=true&usageScript={base64}&usageAutoInterval=30
```

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

src-tauri/src/deeplink/parser.rs

@@ -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,
     })
 }