document repo map and local dev, add deploy-prod skill

- CLAUDE.md gains a repo map, endpoint list, and local dev setup
  (server serves only ./public — symlink ../frontend once)
- new deploy-prod skill captures the Dokploy deploy + buildTag
  verification flow; track .agents/.claude skills and skills-lock.json
- ignore server/data, test-results, .claude/worktrees

skills-lock.json

@@ -0,0 +1,11 @@
+{
+  "version": 1,
+  "skills": {
+    "mobile-app-ui-design": {
+      "source": "ceorkm/mobile-app-ui-design",
+      "sourceType": "github",
+      "skillPath": "SKILL.md",
+      "computedHash": "208e77416eeb4cf441d64f49dfb1b2423d87216b4e7bf767ee96ed6cf1c2e3fa"
+    }
+  }
+}