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Cloudflare was caching /static/style.css and /static/app.js at the edge for up to 4 hours (its default Browser Cache TTL, since the app sets no explicit Cache-Control), so deploys could look like they hadn't landed even though the origin was already up to date. A content hash of style.css/app.js/htmx.min.js, computed once at startup, is now appended as ?v=<hash> to their URLs in base.html, so every deploy that changes those files produces new, never-cached URLs and needs no manual cache purge. Also commits the live-sync-updates design spec, which was written but never staged earlier in the session. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
