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/claude_mcp.rs

@@ -37,7 +37,7 @@ fn ensure_mcp_override_migrated() {
 
     if let Some(parent) = new_path.parent() {
         if let Err(err) = fs::create_dir_all(parent) {
-            log::warn!("创建 MCP 目录失败: {}", err);
+            log::warn!("创建 MCP 目录失败: {err}");
             return;
         }
     }
@@ -250,14 +250,13 @@ pub fn set_mcp_servers_map(
             map.clone()
         } else {
             return Err(AppError::McpValidation(format!(
-                "MCP 服务器 '{}' 不是对象",
-                id
+                "MCP 服务器 '{id}' 不是对象"
             )));
         };
 
         if let Some(server_val) = obj.remove("server") {
             let server_obj = server_val.as_object().cloned().ok_or_else(|| {
-                AppError::McpValidation(format!("MCP 服务器 '{}' server 字段不是对象", id))
+                AppError::McpValidation(format!("MCP 服务器 '{id}' server 字段不是对象"))
             })?;
             obj = server_obj;
         }