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/config.rs

@@ -29,6 +29,15 @@ pub async fn get_config_status(app: String) -> Result<ConfigStatus, String> {
 
             Ok(ConfigStatus { exists, path })
         }
+        AppType::Gemini => {
+            let env_path = crate::gemini_config::get_gemini_env_path();
+            let exists = env_path.exists();
+            let path = crate::gemini_config::get_gemini_dir()
+                .to_string_lossy()
+                .to_string();
+
+            Ok(ConfigStatus { exists, path })
+        }
     }
 }
 
@@ -44,6 +53,7 @@ pub async fn get_config_dir(app: String) -> Result<String, String> {
     let dir = match AppType::from_str(&app).map_err(|e| e.to_string())? {
         AppType::Claude => config::get_claude_config_dir(),
         AppType::Codex => codex_config::get_codex_config_dir(),
+        AppType::Gemini => crate::gemini_config::get_gemini_dir(),
     };
 
     Ok(dir.to_string_lossy().to_string())
@@ -55,16 +65,17 @@ pub async fn open_config_folder(handle: AppHandle, app: String) -> Result<bool,
     let config_dir = match AppType::from_str(&app).map_err(|e| e.to_string())? {
         AppType::Claude => config::get_claude_config_dir(),
         AppType::Codex => codex_config::get_codex_config_dir(),
+        AppType::Gemini => crate::gemini_config::get_gemini_dir(),
     };
 
     if !config_dir.exists() {
-        std::fs::create_dir_all(&config_dir).map_err(|e| format!("创建目录失败: {}", e))?;
+        std::fs::create_dir_all(&config_dir).map_err(|e| format!("创建目录失败: {e}"))?;
     }
 
     handle
         .opener()
         .open_path(config_dir.to_string_lossy().to_string(), None::<String>)
-        .map_err(|e| format!("打开文件夹失败: {}", e))?;
+        .map_err(|e| format!("打开文件夹失败: {e}"))?;
 
     Ok(true)
 }
@@ -87,14 +98,14 @@ pub async fn pick_directory(
         builder.blocking_pick_folder()
     })
     .await
-    .map_err(|e| format!("弹出目录选择器失败: {}", e))?;
+    .map_err(|e| format!("弹出目录选择器失败: {e}"))?;
 
     match result {
         Some(file_path) => {
             let resolved = file_path
                 .simplified()
                 .into_path()
-                .map_err(|e| format!("解析选择的目录失败: {}", e))?;
+                .map_err(|e| format!("解析选择的目录失败: {e}"))?;
             Ok(Some(resolved.to_string_lossy().to_string()))
         }
         None => Ok(None),
@@ -114,13 +125,13 @@ pub async fn open_app_config_folder(handle: AppHandle) -> Result<bool, String> {
     let config_dir = config::get_app_config_dir();
 
     if !config_dir.exists() {
-        std::fs::create_dir_all(&config_dir).map_err(|e| format!("创建目录失败: {}", e))?;
+        std::fs::create_dir_all(&config_dir).map_err(|e| format!("创建目录失败: {e}"))?;
     }
 
     handle
         .opener()
         .open_path(config_dir.to_string_lossy().to_string(), None::<String>)
-        .map_err(|e| format!("打开文件夹失败: {}", e))?;
+        .map_err(|e| format!("打开文件夹失败: {e}"))?;
 
     Ok(true)
 }