sync: stale skill detection, sentry filtering, claim removal, review improvements

Stale Detection:
- Detect skills removed/moved from GitHub (3 consecutive 404s threshold)
- Hide stale skills from browse/search, show warning banner on detail page
- Serve cached files with isStale flag when GitHub returns 404
- Add stale-check crawler command for batch verification
- CLI shows warning when installing stale skills from cache

Sentry & Error Handling:
- Filter browser extension errors and add denyUrls
- Anti-inflation measures and sentinel recalibration for curation

Claim & Removal:
- Enhanced ClaimForm with repo-level removal support
- Add repo-removal-request API endpoint with tests
- Improved owner page with bilingual content

Review Pipeline:
- Review version and reviewer tracking in submit API
- Source format filter for pending reviews
- Updated review tests

Other:
- Updated i18n strings (en/fa)
- BrowseFilters improvements
- Dockerfile updates

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

apps/web/middleware.ts

@@ -83,6 +83,9 @@ export const config = {
     '/(en|fa)/:path*',
     // Match API routes (for CSRF protection)
     '/api/:path*',
+    // Match skill paths explicitly (repo names like "next.js" contain dots
+    // which would be excluded by the catch-all pattern below)
+    '/skill/:path*',
     // Match other paths (exclude static files and Next.js internals)
     '/((?!_next|_vercel|.*\\..*).*)',
   ],