feat(web-dashboard): complete settings, health, shared data and build integration

- Settings editor with API key masking and conflict detection
- Health dashboard with status cards and one-click fixes
- Home dashboard with stats and quick actions
- Shared data viewer for commands/skills/agents
- Build scripts for UI + server bundle
- Bundle size verification (<500KB gzipped)
- Pre-release checklist script

ui/package.json

@@ -11,6 +11,7 @@
   },
   "dependencies": {
     "@hookform/resolvers": "^5.2.2",
+    "@radix-ui/react-alert-dialog": "^1.1.15",
     "@radix-ui/react-dialog": "^1.1.15",
     "@radix-ui/react-dropdown-menu": "^2.1.16",
     "@radix-ui/react-label": "^2.1.8",