Move web host closer to razor-only routing

scripts/route_lint.mjs

@@ -15,8 +15,8 @@ const files = [
 const required = [
   {
     file: 'src/TaxBaik.Web/Program.cs',
-    pattern: 'app.MapFallbackToFile("admin/{*path:nonfile}", "admin/index.html");',
-    message: '관리자 SPA 폴백은 admin/index.html로만 연결되어야 합니다.'
+    pattern: 'app.MapRazorPages();',
+    message: '관리자 화면은 Razor Pages 라우팅을 사용해야 합니다.'
   },
   {
     file: 'tests/e2e/route-isolation.spec.ts',