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/services/mcp.rs

@@ -54,7 +54,8 @@ impl McpService {
 
             // 修复：sync_other_side=true 时，先将 MCP 复制到另一侧，然后强制同步
             // 这才是"同步到另一侧"的正确语义：将 MCP 跨应用复制
-            if sync_other_side {
+            if sync_other_side && app != AppType::Gemini {
+                // Gemini 暂不支持跨应用复制，直接跳过
                 // 获取当前 MCP 条目的克隆（刚刚插入的，不可能失败）
                 let current_entry = cfg
                     .mcp_for(&app)
@@ -67,6 +68,7 @@ impl McpService {
                 let other_app = match app {
                     AppType::Claude => AppType::Codex,
                     AppType::Codex => AppType::Claude,
+                    AppType::Gemini => unreachable!("Gemini 已在外层 if 中跳过"),
                 };
 
                 cfg.mcp_for_mut(&other_app)
@@ -77,6 +79,7 @@ impl McpService {
                 match app {
                     AppType::Claude => sync_codex = true,
                     AppType::Codex => sync_claude = true,
+                    AppType::Gemini => unreachable!("Gemini 已在外层 if 中跳过"),
                 }
             }
 
@@ -118,6 +121,7 @@ impl McpService {
                 match app {
                     AppType::Claude => mcp::sync_enabled_to_claude(&snapshot)?,
                     AppType::Codex => mcp::sync_enabled_to_codex(&snapshot)?,
+                    AppType::Gemini => {},  // Gemini 暂不支持 MCP 同步
                 }
             }
         }
@@ -144,6 +148,7 @@ impl McpService {
                 match app {
                     AppType::Claude => mcp::sync_enabled_to_claude(&snapshot)?,
                     AppType::Codex => mcp::sync_enabled_to_codex(&snapshot)?,
+                    AppType::Gemini => {},  // Gemini 暂不支持 MCP 同步
                 }
             }
         }
@@ -163,6 +168,7 @@ impl McpService {
         match app {
             AppType::Claude => mcp::sync_enabled_to_claude(&snapshot)?,
             AppType::Codex => mcp::sync_enabled_to_codex(&snapshot)?,
+            AppType::Gemini => {},  // Gemini 暂不支持 MCP 同步
         }
         Ok(())
     }