- **Provider Duplicate** - Quick duplicate existing provider configurations for easy variant creation

- **Edit Mode Toggle** - Show/hide drag handles to optimize editing experience

- **Custom Endpoint Management** - Support multi-endpoint configuration for aggregator providers

- **Usage Query Enhancements**

- Auto-refresh interval: Support periodic automatic usage query

- Test Script API: Validate JavaScript scripts before execution

- Template system expansion: Custom blank template, support for access token and user ID parameters

- **Configuration Editor Improvements**

- Add JSON format button

- Real-time TOML syntax validation for Codex configuration

- **Auto-sync on Directory Change** - When switching Claude/Codex config directories (e.g., WSL environment), automatically sync current provider to new directory without manual operation

- **Load Live Config When Editing Active Provider** - When editing the currently active provider, prioritize displaying the actual effective configuration to protect user manual modifications

- **New Provider Presets** - DMXAPI, Azure Codex, AnyRouter, AiHubMix, MiniMax

- **Partner Promotion Mechanism** - Support ecosystem partner promotion (e.g., Zhipu GLM Z.ai)

- **Configuration Directory Switching**

- Introduced unified post-change sync utility (`postChangeSync.ts`)

- Auto-sync current providers to new directory when changing Claude/Codex config directories

- Perfect support for WSL environment switching

- Auto-sync after config import to ensure immediate effectiveness

- Use Result pattern for graceful error handling without blocking main flow

- Distinguish "fully successful" and "partially successful" states for precise user feedback

- **UI/UX Enhancements**

- Provider cards: Unique icons and color identification

- Unified border design system across all components

- Drag interaction optimization: Push effect animation, improved handle icons

- Enhanced current provider visual feedback

- Dialog size standardization and layout consistency

- Form experience: Optimized model placeholders, simplified provider hints, category-specific hints

- **Complete Internationalization Coverage**

- Error messages internationalization

- Tray menu internationalization

- All UI components internationalization

- **Usage Display Moved Inline** - Usage display moved next to enable button

- **Configuration Sync**

- Fixed `apiKeyUrl` priority issue

- Fixed MCP sync-to-other-side functionality failure

- Fixed sync issues after config import

- Prevent silent fallback and data loss on config error

- **Usage Query**

- Fixed auto-query interval timing issue

- Ensure refresh button shows loading animation on click

- **UI Issues**

- Fixed name collision error (`get_init_error` command)

- Fixed language setting rollback after successful save

- Fixed language switch state reset (dependency cycle)

- Fixed edit mode button alignment

- **Configuration Management**

- Fixed Codex API Key auto-sync

- Fixed endpoint speed test functionality

- Fixed provider duplicate insertion position (next to original provider)

- Fixed custom endpoint preservation in edit mode

- **Startup Issues**

- Force exit on config error (no silent fallback)

- Eliminate code duplication causing initialization errors

**Backend Refactoring (Rust)** - Completed 5-phase refactoring:

- **Phase 1**: Unified error handling (`AppError` + i18n error messages)

- **Phase 2**: Command layer split by domain (`commands/{provider,mcp,config,settings,plugin,misc}.rs`)

- **Phase 3**: Integration tests and transaction mechanism (config snapshot + failure rollback)

- **Phase 4**: Extracted Service layer (`services/{provider,mcp,config,speedtest}.rs`)

- **Phase 5**: Concurrency optimization (`RwLock` instead of `Mutex`, scoped guard to avoid deadlock)

**Frontend Refactoring (React + TypeScript)** - Completed 4-stage refactoring:

- **Stage 1**: Test infrastructure (vitest + MSW + @testing-library/react)

- **Stage 2**: Extracted custom hooks (`useProviderActions`, `useMcpActions`, `useSettings`, `useImportExport`, etc.)

- **Stage 3**: Component splitting and business logic extraction

- **Stage 4**: Code cleanup and formatting unification

**Testing System**:

- Hooks unit tests 100% coverage

- Integration tests covering key processes (App, SettingsDialog, MCP Panel)

- MSW mocking backend API to ensure test independence

**Code Quality**:

- Unified parameter format: All Tauri commands migrated to camelCase (Tauri 2 specification)

- `AppType` renamed to `AppId`: Semantically clearer

- Unified parsing with `FromStr` trait: Centralized `app` parameter parsing

- Eliminate code duplication: DRY violations cleanup

- Remove unused code: `missing_param` helper function, deprecated `tauri-api.ts`, redundant `KimiModelSelector` component

**Internal Optimizations**:

- **Removed Legacy Migration Logic**: v3.6 removed v1 config auto-migration and copy file scanning logic

- ✅ **Impact**: Improved startup performance, cleaner code

- ✅ **Compatibility**: v2 format configs fully compatible, no action required

- ⚠️ **Note**: Users upgrading from v3.1.0 or earlier should first upgrade to v3.2.x or v3.5.x for one-time migration, then upgrade to v3.6

- **Command Parameter Standardization**: Backend unified to use `app` parameter (values: `claude` or `codex`)

- ✅ **Impact**: More standardized code, friendlier error prompts

- ✅ **Compatibility**: Frontend fully adapted, users don't need to care about this change

- Updated to Tauri 2.8.x

- Updated to TailwindCSS 4.x

- Updated to TanStack Query v5.90.x

- Maintained React 18.2.x and TypeScript 5.3.x