WorldMonitor Review Context

TypeScript monorepo: Vanilla TS panels (no React), sebuf proto RPCs, Redis-cached seed data, Vercel edge functions, Railway cron seeds.

Key patterns:

• Panels extend Panel base class with fetchData() returning boolean, setContent(html), showError(msg, retry)
• Private _hasData guard prevents overwriting good data with error on retry
• Seed scripts use runSeed(domain, name, key, fetchFn, options) with TTL ≥ 3× seed interval
• RPC handlers read from Redis via getCachedJson(key, true), return typed proto response
• cachedFetchJson coalesces concurrent cache misses — use it for on-demand fetches
• All panels registered in src/config/panels.ts (FINANCE_PANELS + FULL_PANELS) and src/app/panel-layout.ts