add PDD workflow: CLAUDE.md, PDD.md, active.md symlink

docs/PDD.md

@@ -0,0 +1,23 @@
+# Product Definition Document — NAS Tools
+
+## Vision
+
+A single dashboard to manage all self-hosted services on the NAS — Docker containers, media, tools, system health — accessible from anywhere via a clean web UI.
+
+## Goals
+
+1. **Unified management** — one dashboard for all NAS services (containers, media, tools, auth)
+2. **GFW-proof deployment** — all traffic routes through VPS + Tailscale, works from China
+3. **Self-healing** — auto-detect down containers, email alerts, health checks
+4. **CI/CD from Gitea** — push to deploy with zero manual SSH
+
+## Target Users
+
+Self (Jimmy Gan). Secondary: family members who access media services on the NAS.
+
+## Success Metrics
+
+- Dashboard loads in < 3s from anywhere
+- All CI workflows green
+- Zero manual SSH deploys
+- < 5min recovery from container crash

docs/specs/active.md

@@ -0,0 +1 @@
+../../specs/sprint-06-code-quality.md