S2: Colony chat UI — dark industrial design, JetBrains Mono

- Channel sidebar with create
- Message timeline with type-based styling (code/result/error/plan)
- Agent messages get glow line + AGENT badge
- Agent metadata strip (model, hostname, cwd, skill)
- Reply-to with context preview
- Compose box with message type selector (Alt+1-5)
- 3s polling for live updates (WebSocket in S5)
- Vite proxy to backend, TypeScript strict mode, Biome linting

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/colony/package.json

@@ -12,6 +12,7 @@
   "dependencies": {
     "@base-ui/react": "^1.3.0",
     "@fontsource-variable/geist": "^5.2.8",
+    "@fontsource/jetbrains-mono": "^5.2.8",
     "@tailwindcss/vite": "^4.2.2",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",