feat(ops): replace Cloudflare Pages with Workers for frontend hosting

README.md

@@ -187,7 +187,7 @@ frontend/
 Everything needed to deploy and configure the stack (Docker, Nginx, Cloudflare rules, future Terraform).
 
 - Cloudflare
-  - [worker.js](infrastructure/cloudflare/worker.js) — adds immutable cache headers to HLS segments
+  - [worker.js](infrastructure/cloudflare/worker.js) — Cloudflare Worker serving the static SPA and adding immutable cache headers to HLS segments
 - Nginx
   - [Dockerfile](infrastructure/nginx/Dockerfile) — builds Nginx with custom config
   - [nginx.conf](infrastructure/nginx/nginx.conf) — reverse proxy, static SPA, HLS delivery