chore: Update tsconfig.json for Next.js 15 compatibility

- Remove .next/types/**/*.ts from include (no longer needed in Next.js 15)

frontend/tsconfig.json

@@ -22,6 +22,6 @@
       "@/*": ["./*"]
     }
   },
-  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx"],
   "exclude": ["node_modules"]
 }