Migrate AI runtime to SDK and hardcode Zhipu coding endpoint

package.json

@@ -15,6 +15,7 @@
     "@elysiajs/eden": "^1.4.8",
     "@libsql/client": "^0.17.0",
     "@tailwindcss/postcss": "^4.2.1",
+    "ai": "^6.0.104",
     "better-auth": "^1.4.19",
     "clsx": "^2.1.1",
     "date-fns": "^4.1.0",
@@ -25,7 +26,8 @@
     "react": "^19.2.4",
     "react-dom": "^19.2.4",
     "recharts": "^3.7.0",
-    "workflow": "^4.1.0-beta.60"
+    "workflow": "^4.1.0-beta.60",
+    "zhipu-ai-provider": "^0.2.2"
   },
   "devDependencies": {
     "@types/node": "^25.3.0",