[backend] fix: 修复异常处理和类型转换问题

frontend/node_modules/classnames/bind.d.ts

@@ -0,0 +1,17 @@
+import { ArgumentArray } from './index.js';
+
+declare namespace classNames {
+	type Binding = Record<string, string>;
+}
+
+interface ClassNames {
+	(this: classNames.Binding | undefined, ...args: ArgumentArray): string;
+
+	default: ClassNames;
+}
+
+declare const classNames: ClassNames;
+
+export as namespace classNames;
+
+export = classNames;