feat: complete Quantumancy web app — full frontend + docs

Frontend (React 18 + TS + Vite):
- Landing: glitching hero, live /api/stats veil ticker, mode cards, featured spirits
- Séance: three.js shader ghost (hue/form per entity, mood + audio-reactive),
  Ouija planchette board spelling utterances, transcript with TTS replay,
  entity dossier, direct contact streaming, passive/active listening
- Modes: Wire Ghost telemetry panel, EVP mic anomaly detection, WebUSB
  RTL-SDR sweep + waterfall (hardware pass pending), Ouija/Direct Contact
- Codex: public registry + entity dossiers, rarity tiers, i18n EN/ES complete
- State: VeilSocket (reconnect/backoff), seance reducer, auth context
- 72 vitest tests green; served by FastAPI at :7777

Docs: README + as-built plans 3-7

frontend/vite.config.ts

@@ -11,6 +11,12 @@ export default defineConfig({
     proxy: {
       '/auth': 'http://localhost:7777',
       '/healthz': 'http://localhost:7777',
+      '/api': 'http://localhost:7777',
+      '/audio': 'http://localhost:7777',
+      '/ws': {
+        target: 'http://localhost:7777',
+        ws: true,
+      },
     },
   },
   test: {