robin 6320cb14e5 fix: Service Worker always returns valid Response ...

- Fixed fetch handler that could return undefined instead of Response
- Changed from stale-while-revalidate to network-first with cache fallback
- Always return proper 503 Response when offline and no cache available
- Bump cache version to v21 to force SW update

2026-01-19 11:39:40 +01:00

7.6 KiB

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