* perf(rss): route RSS direct to Railway, skip Vercel middleman
Vercel /api/rss-proxy has 65% error rate (207K failed invocations/12h).
Route browser RSS requests directly to Railway (proxy.worldmonitor.app)
via Cloudflare CDN, eliminating Vercel as middleman.
- Add VITE_RSS_DIRECT_TO_RELAY feature flag (default off) for staged rollout
- Centralize RSS proxy URL in rssProxyUrl() with desktop/dev/prod routing
- Make Railway /rss public (skip auth, keep rate limiting with CF-Connecting-IP)
- Add wildcard *.worldmonitor.app CORS + always emit Vary: Origin on /rss
- Extract ~290 RSS domains to shared/rss-allowed-domains.cjs (single source of truth)
- Convert Railway domain check to Set for O(1) lookups
- Remove rss-proxy from KEYED_CLOUD_API_PATTERN (no longer needs API key header)
- Add edge function test for shared domain list import
* fix(edge): replace node:module with JSON import for edge-compatible RSS domains
api/_rss-allowed-domains.js used createRequire from node:module which is
unsupported in Vercel Edge Runtime, breaking all edge functions (including
api/gpsjam). Replaced with JSON import attribute syntax that works in both
esbuild (Vercel build) and Node.js 22+ (tests).
Also fixed middleware.ts TS18048 error where VARIANT_OG[variant] could be
undefined.
* test(edge): add guard against node: built-in imports in api/ files
Scans ALL api/*.js files (including _ helpers) for node: module imports
which are unsupported in Vercel Edge Runtime. This would have caught the
createRequire(node:module) bug before it reached Vercel.
* fix(edge): inline domain array and remove NextResponse reference
- Replace `import ... with { type: 'json' }` in _rss-allowed-domains.js
with inline array — Vercel esbuild doesn't support import attributes
- Replace `NextResponse.next()` with bare `return` in middleware.ts —
NextResponse was never imported
* ci(pre-push): add esbuild bundle check and edge function tests
The pre-push hook now catches Vercel build failures locally:
- esbuild bundles each api/*.js entrypoint (catches import attribute
syntax, missing modules, and other bundler errors)
- runs edge function test suite (node: imports, module isolation)
