feat: add injection preview functionality and enhance specs management

- Implemented injection preview feature in InjectionControlTab with file listing and content preview.
- Added new API endpoint for fetching injection preview data.
- Introduced content length caching for performance optimization.
- Enhanced spec loading to support category filtering.
- Updated localization files for new features and terms.
- Created new personal and project specs for coding style and architecture constraints.
- Improved CLI options for category selection in spec commands.

ccw/src/core/server.ts

@@ -626,11 +626,12 @@ export async function startServer(options: ServerOptions = {}): Promise<http.Ser
         if (await handleFilesRoutes(routeContext)) return;
       }
 
-      // System routes (data, health, version, paths, shutdown, notify, storage, dialog, a2ui answer broker)
+      // System routes (data, health, version, paths, shutdown, notify, storage, dialog, a2ui answer broker, system settings)
       if (pathname === '/api/data' || pathname === '/api/health' ||
           pathname === '/api/version-check' || pathname === '/api/shutdown' ||
           pathname === '/api/recent-paths' || pathname === '/api/switch-path' ||
           pathname === '/api/remove-recent-path' || pathname === '/api/system/notify' ||
+          pathname === '/api/system/settings' || pathname === '/api/system/hooks/install-recommended' ||
           pathname === '/api/a2ui/answer' ||
           pathname.startsWith('/api/storage/') || pathname.startsWith('/api/dialog/')) {
         if (await handleSystemRoutes(routeContext)) return;