feat(gemini): add Gemini provider integration (#202)

* feat(gemini): add Gemini provider integration

- Add gemini_config.rs module for .env file parsing
- Extend AppType enum to support Gemini
- Implement GeminiConfigEditor and GeminiFormFields components
- Add GeminiIcon with standardized 1024x1024 viewBox
- Add Gemini provider presets configuration
- Update i18n translations for Gemini support
- Extend ProviderService and McpService for Gemini

* fix(gemini): resolve TypeScript errors, add i18n support, and fix MCP logic

**Critical Fixes:**
- Fix TS2741 errors in tests/msw/state.ts by adding missing Gemini type definitions
- Fix ProviderCard.extractApiUrl to support GOOGLE_GEMINI_BASE_URL display
- Add missing apps.gemini i18n keys (zh/en) for proper app name display
- Fix MCP service Gemini cross-app duplication logic to prevent self-copy

**Technical Details:**
- tests/msw/state.ts: Add gemini default providers, current ID, and MCP config
- ProviderCard.tsx: Check both ANTHROPIC_BASE_URL and GOOGLE_GEMINI_BASE_URL
- services/mcp.rs: Skip Gemini in sync_other_side logic with unreachable!() guards
- Run pnpm format to auto-fix code style issues

**Verification:**
- ✅ pnpm typecheck passes
- ✅ pnpm format completed

* feat(gemini): enhance authentication and config parsing

- Add strict and lenient .env parsing modes
- Implement PackyCode partner authentication detection
- Support Google OAuth official authentication
- Auto-configure security.auth.selectedType for PackyCode
- Add comprehensive test coverage for all auth types
- Update i18n for OAuth hints and Gemini config

---------

Co-authored-by: Jason <farion1231@gmail.com>

src-tauri/src/commands/misc.rs

@@ -10,12 +10,12 @@ pub async fn open_external(app: AppHandle, url: String) -> Result<bool, String>
     let url = if url.starts_with("http://") || url.starts_with("https://") {
         url
     } else {
-        format!("https://{}", url)
+        format!("https://{url}")
     };
 
     app.opener()
         .open_url(&url, None::<String>)
-        .map_err(|e| format!("打开链接失败: {}", e))?;
+        .map_err(|e| format!("打开链接失败: {e}"))?;
 
     Ok(true)
 }
@@ -29,7 +29,7 @@ pub async fn check_for_updates(handle: AppHandle) -> Result<bool, String> {
             "https://github.com/farion1231/cc-switch/releases/latest",
             None::<String>,
         )
-        .map_err(|e| format!("打开更新页面失败: {}", e))?;
+        .map_err(|e| format!("打开更新页面失败: {e}"))?;
 
     Ok(true)
 }
@@ -37,7 +37,7 @@ pub async fn check_for_updates(handle: AppHandle) -> Result<bool, String> {
 /// 判断是否为便携版（绿色版）运行
 #[tauri::command]
 pub async fn is_portable_mode() -> Result<bool, String> {
-    let exe_path = std::env::current_exe().map_err(|e| format!("获取可执行路径失败: {}", e))?;
+    let exe_path = std::env::current_exe().map_err(|e| format!("获取可执行路径失败: {e}"))?;
     if let Some(dir) = exe_path.parent() {
         Ok(dir.join("portable.ini").is_file())
     } else {