docs: mark LiteLLM phase tasks complete

Update Phase 14 checklist to reflect completed LiteLLM scaffold, health probe, networking, auth-aware health checks, and dashboard status UI delivery.

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

PLAN.md

@@ -173,6 +173,15 @@ nas-tools/
 44. ~~Deploy Watchtower for auto-updates~~ — Done (internal, no sidebar link needed)
 45. ~~Deploy Speedtest on port 8080~~ — Done, in dashboard sidebar
 
+### Phase 14 — Hybrid AI Gateway (LiteLLM + cc-connect) 🚧
+49. ~~Add `litellm/` service scaffold (`docker-compose.yml`, `config/litellm.yaml`, `.env.example`) with localhost-only host binding and env-driven provider keys~~ — Done
+50. ~~Add dashboard backend LiteLLM operational probe (`/api/litellm/health`) and wire into protected routes~~ — Done
+51. Add `cc-connect/` templates (`README.md`, `config.example.toml`, optional compose) for mobile bridge rollout
+52. ~~Deploy LiteLLM image to NAS using server2 pull + stream load workflow to avoid slow GHCR pulls on NAS~~ — Done
+53. ~~Network fix: attach LiteLLM to `nas-dashboard_internal` and set dashboard-dev `LITELLM_URL=http://litellm:4005`~~ — Done
+54. ~~Update backend health probe to support auth-required mode and configured health auth key~~ — Done
+55. ~~Add LiteLLM dashboard UI page with sidebar link and health status card~~ — Done
+
 ### Phase 13 — Off-site Backup
 46. Add cloud backup (OneDrive or Google Drive) for critical data
 47. Encrypt backups before upload