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/Dockerfile

@@ -45,6 +45,7 @@ ARG NEXT_PUBLIC_OPENPANEL_API_URL
 ARG NEXT_PUBLIC_OPENPANEL_SCRIPT_URL
 ARG NEXT_PUBLIC_UMAMI_WEBSITE_ID
 ARG NEXT_PUBLIC_UMAMI_URL
+ARG NEXT_PUBLIC_IS_PRIMARY
 
 # Convert ARGs to ENVs so they're available during build
 ENV NEXT_PUBLIC_APP_URL=$NEXT_PUBLIC_APP_URL
@@ -56,6 +57,7 @@ ENV NEXT_PUBLIC_OPENPANEL_API_URL=$NEXT_PUBLIC_OPENPANEL_API_URL
 ENV NEXT_PUBLIC_OPENPANEL_SCRIPT_URL=$NEXT_PUBLIC_OPENPANEL_SCRIPT_URL
 ENV NEXT_PUBLIC_UMAMI_WEBSITE_ID=$NEXT_PUBLIC_UMAMI_WEBSITE_ID
 ENV NEXT_PUBLIC_UMAMI_URL=$NEXT_PUBLIC_UMAMI_URL
+ENV NEXT_PUBLIC_IS_PRIMARY=$NEXT_PUBLIC_IS_PRIMARY
 
 # Build the application (turbo will build dependencies first)
 RUN pnpm turbo run build --filter=@skillhub/web