feat: migrate frontend to Astro + expand AI moderation + backend admin/runtime config

Frontend:
- migrate from Vite to Astro (astro.config.mjs, pages/, layouts/)
- add admin panel, settings page, command palette, error boundary
- refactor App.tsx, MascotChatbot, Sidebar, Header, DashboardLayout
- update API client, WebSocket, auth, dashboard features

Backend:
- add admin module and config routes
- refactor middlewares, Redis connection, WebSocket server/bridge
- add runtime config loader

Discord Gateway:
- refactor AI moderation: circuit breaker, concurrency limiter, fallback processor
- add media analysis client, Seaxng search, user profile learner
- add new drizzle migration

Shared:
- extend database schema, add new config fields

services/frontend/package.json

@@ -4,18 +4,20 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "dev": "vite --host 0.0.0.0",
-    "build": "tsc --noEmit && NODE_NO_WARNINGS=1 vite build",
-    "preview": "vite preview --host 0.0.0.0 --port 3000",
+    "dev": "astro dev --host 0.0.0.0",
+    "build": "astro build",
+    "preview": "astro preview --host 0.0.0.0 --port 3000",
     "typecheck": "tsc --noEmit",
     "lint": "biome check --diagnostic-level=error src/",
     "format": "biome format --write src/"
   },
   "dependencies": {
+    "@astrojs/react": "^6.0.0",
     "@bete/shared": "workspace:*",
     "@radix-ui/react-scroll-area": "^1.2.10",
     "@radix-ui/react-slot": "^1.2.4",
     "@radix-ui/react-tabs": "^1.1.13",
+    "astro": "^7.0.4",
     "clsx": "^2.1.1",
     "framer-motion": "^12.4.0",
     "lucide-react": "^1.16.0",
@@ -28,11 +30,9 @@
     "@tailwindcss/postcss": "^4.3.0",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
-    "@vitejs/plugin-react": "^6.0.2",
     "autoprefixer": "^10.5.0",
     "postcss": "^8.5.14",
     "tailwindcss": "^4.3.0",
-    "typescript": "^5.9.3",
-    "vite": "^8.0.13"
+    "typescript": "^5.9.3"
   }
 }