refactor: remove cloudflare-worker.js and related configurations

refactor: replace UptimeRobot with Cloudflare Workers for service keep-alive mechanism

fix: rewrite Space-host redirects to relative paths + pass x-forwarded-proto

fix: patch google font → local at runtime to survive cached Stage 1

feat: vendor Plus Jakarta Sans fonts and patch layouts to resolve build-time network constraints, update health-server proxy logic, and correct UptimeRobot interval units.

perf: move pnpm install before next.config.js patches to preserve cache

fix: redirect bare paths to /app/ and disable image optimization

fix: redirect /app root to /app/auth/ instead of white-screening

Fix ERR_TOO_MANY_REDIRECTS: add trailingSlash:true + config-hash rebuild guard

fix: patch nginx to re-add /app prefix when proxying to Next.js

fix: move next build to container startup — HF builder cgroup too small

fix: fresh clone + filtered pnpm install in frontend stage to cut peak RSS

fix: split frontend into isolated build stage to eliminate residual RSS

fix: restore 3072 MB heap for frontend — single-thread needs ~1.9 GB

fix: limit Next.js webpack workers to prevent OOMKilled on HF builder

Fix OOM build (exit 137) by disabling sourcemap generation

initialize project