feat: Add filter persistence with settings integration (#78)

* feat: Add settings modal with GitHub PAT and filter toggle

- Add GeneralSettingsModal with General and GitHub tabs
- Create GitHub PAT input field that saves to .env as GITHUB_TOKEN
- Add animated toggle component for SAVE_FILTER setting
- Create API endpoints for settings management
- Add Input and Toggle UI components
- Implement smooth animations for toggle interactions
- Add proper error handling and user feedback

* feat: Add filter persistence with settings integration

- Add filter persistence system that saves user filter preferences to .env
- Create FILTERS variable in .env to store complete filter state as JSON
- Add SAVE_FILTER toggle in settings to enable/disable persistence
- Implement auto-save functionality with 500ms debounce
- Add loading states and visual feedback for filter restoration
- Create API endpoints for managing saved filters
- Add filter management UI in settings modal
- Support for search query, type filters, sort order, and updatable status
- Seamless integration across all script tabs (Available, Downloaded, Installed)
- Auto-clear saved filters when persistence is disabled

.env.example

@@ -16,4 +16,8 @@ ALLOWED_SCRIPT_PATHS="scripts/"
 
 # WebSocket Configuration
 WEBSOCKET_PORT="3001"
-GITHUB_TOKEN=your_github_token_here
+
+# User settings
+GITHUB_TOKEN=
+SAVE_FILTER=false
+FILTERS=