chore: update dependencies and improve type safety in mcp routes

- Updated @modelcontextprotocol/sdk to version 1.22.0 and @nuxt/content to 3.8.2.
- Upgraded zod to version 4.1.12 for better type inference.
- Updated wrangler to version 4.48.0.
- Refactored mcp.ts to use zod for input schema validation with explicit types for language arguments.

package.json

@@ -12,23 +12,22 @@
     "lint": "eslint ."
   },
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^1.21.1",
-    "@nuxt/content": "3.8.0",
+    "@modelcontextprotocol/sdk": "1.22.0",
+    "@nuxt/content": "3.8.2",
     "@nuxt/eslint": "1.10.0",
     "@nuxthub/core": "^0.9.0",
-    "ai": "^6.0.0-beta.99",
     "better-sqlite3": "^12.4.1",
     "nuxt": "4.2.1",
     "vue": "3.5.24",
     "vue-router": "4.6.3",
-    "zod": "3"
+    "zod": "^4.1.12"
   },
   "devDependencies": {
     "@nuxt/eslint-config": "1.10.0",
     "eslint": "9.39.1",
     "typescript": "5.9.3",
     "vue-tsc": "3.1.3",
-    "wrangler": "4.47.0"
+    "wrangler": "4.48.0"
   },
   "packageManager": "pnpm@10.12.1",
   "pnpm": {