fix: workbox precache conflict + clean up duplicate API routes

- Exclude assets/icon/** from workbox globPatterns (already in includeAssets)
- Remove duplicate /api/* and /aiui/api/web-search routes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

neode-ui/vite.config.ts

@@ -44,6 +44,7 @@ export default defineConfig({
           '**/*-1.47mb.mp4',
           '**/bg-*.mp4', // Exclude large background videos from precache
           '**/video-intro.mp4', // Exclude video-intro.mp4 from precache (7MB, cached at runtime)
+          '**/assets/icon/**', // Icons are in includeAssets — don't duplicate in glob precache
         ],
         maximumFileSizeToCacheInBytes: 5 * 1024 * 1024, // 5MB limit (increased from 2MB)
         skipWaiting: false, // Wait for user to accept update