✨ feat(ui): add settings menu and mask opacity control

- Add SettingsMenu component for quick navigation between settings sections
- Add mask opacity control to adjust overlay transparency
- Optimize search suggestions with immediate response and smooth animations
- Refine component styles for more compact interface
- Fix Translation interface type definition for maskOpacity
- Unify Bilibili API path to simplify environment handling

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

vite.config.ts

@@ -7,10 +7,10 @@ export default defineConfig({
     port: 3000,
     host: '0.0.0.0',
     proxy: {
-      '/bilibili': {
+      '/api/bilibili': {
         target: 'https://s.search.bilibili.com',
         changeOrigin: true,
-        rewrite: (path) => path.replace(/^\/bilibili/, '/main/suggest'),
+        rewrite: (path) => path.replace(/^\/api\/bilibili/, '/main/suggest'),
         secure: false,
       }
     }