giles 0ce3f95d6c Phase 7c+7d: cache invalidation + offline data layer ...

7c: Client data cache management via element attributes
(sx-cache-invalidate) and response headers (SX-Cache-Invalidate,
SX-Cache-Update). Programmatic API: invalidate-page-cache,
invalidate-all-page-cache, update-page-cache.

7d: Service Worker (sx-sw.js) with IndexedDB for offline-capable
data caching. Network-first for /sx/data/ and /sx/io/, stale-while-
revalidate for /static/. Cache invalidation propagates from
in-memory cache to SW via postMessage.

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

2026-03-08 00:45:33 +00:00

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