[fix] some GitHub Copilot bugs

Author: TechQuery

eslint.config.ts

@@ -47,7 +47,7 @@ export default tsEslint.config(
         warnOnUnsupportedTypeScriptVersion: false,
       },
     },
-    // @ts-expect-error Next.js 15.4 compatibility bug
+    // @ts-expect-error https://github.com/vercel/next.js/issues/81695
     rules: {
       // spellchecker
       '@cspell/spellchecker': [

next-env.d.ts

@@ -1,6 +1,5 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-/// <reference path="./.next/types/routes.d.ts" />
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/pages/api-reference/config/typescript for more information.