refactor: split monolith into 3 microservices (frontend, backend, discord-gateway)

- Extract services into services/{frontend,backend,discord-gateway}
- Create packages/shared/ for shared logger, errors, utils, types
- Setup Modular MVC pattern in backend (controller→service→repository)
- Setup event-driven architecture in discord-gateway with Redis pub/sub
- Move Docker files to infra/docker/ with per-service Dockerfiles
- Update docker-compose.yml to use Traefik-only routing (no port exposes)
- Update GitHub Actions deploy workflow for multi-service matrix build
- Fix all import paths and resolve type errors across all services
- All 3 services pass tsc --noEmit clean

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

services/frontend/src/features/live/components/index.ts

@@ -0,0 +1,9 @@
+// ─── Live feature barrel export ─────────────────────────────────────────────
+
+export { ActiveSpeakers } from "./ActiveSpeakers";
+export { AudioVisualizer } from "./AudioVisualizer";
+export { MusicSubPanel } from "./MusicSubPanel";
+export { NowPlaying } from "./NowPlaying";
+export { RecordingsSubPanel } from "./RecordingsSubPanel";
+export { ScreenSubPanel } from "./ScreenSubPanel";
+export { VoiceConnectionCard } from "./VoiceConnectionCard";