feat(v3.13.0): settings live DB reads, remove Directus/Appwrite, admin stats

Settings fixes:
- MAX_SITES_PER_USER, USER_RATE_LIMIT_PER_MIN/HR now read from DB settings
  table (DB > ENV > default), so dashboard/settings changes apply without
  restart. Sync cache refreshed on every save or delete.
- /api/me reports the live DB value for max_sites_per_user.

Admin improvements:
- Admin users bypass per-user rate limiting entirely (role=admin or ADMIN_EMAILS).
- Admin Overview now shows platform stats: registered users, new users (7d),
  total user sites, available tools.

Plugin cleanup:
- Appwrite and Directus plugins removed from the active registry (8 plugins
  now: WordPress, WooCommerce, WordPress Specialist, Gitea, n8n, Supabase,
  OpenPanel, Coolify). Plugin code is retained for future re-enabling.
- Settings page plugin visibility list updated to match.

Mobile onboarding:
- Stepper steps on narrow viewports stack vertically with correct full border
  and rounded corners on each step.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web/package.json

@@ -0,0 +1,40 @@
+{
+  "name": "mcphub-web",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "description": "MCP Hub SPA dashboard (Track G redesign)",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "typecheck": "tsc -b --noEmit",
+    "lint": "eslint . --ext .ts,.tsx",
+    "preview": "vite preview",
+    "test": "vitest run",
+    "test:watch": "vitest"
+  },
+  "dependencies": {
+    "@tanstack/react-query": "^5.59.0",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "react-router-dom": "^6.27.0",
+    "zustand": "^5.0.0"
+  },
+  "devDependencies": {
+    "@testing-library/jest-dom": "^6.5.0",
+    "@testing-library/react": "^16.0.1",
+    "@types/react": "^18.3.12",
+    "@types/react-dom": "^18.3.1",
+    "@typescript-eslint/eslint-plugin": "^8.10.0",
+    "@typescript-eslint/parser": "^8.10.0",
+    "@vitejs/plugin-react": "^4.3.3",
+    "eslint": "^8.57.1",
+    "eslint-plugin-react-hooks": "^5.0.0",
+    "eslint-plugin-react-refresh": "^0.4.14",
+    "jsdom": "^25.0.1",
+    "msw": "^2.4.11",
+    "typescript": "^5.6.3",
+    "vite": "^5.4.10",
+    "vitest": "^2.1.3"
+  }
+}