feat: 添加CurrentUser修饰器

apps/backend/src/auth/decorator/current-user.decorator.ts

@@ -0,0 +1,14 @@
+import { createParamDecorator, ExecutionContext } from '@nestjs/common';
+import { Request } from 'express';
+
+export interface AuthUser {
+    sessionId: string;
+    userId: string;
+}
+
+export const CurrentUser = createParamDecorator(
+    (data: unknown, ctx: ExecutionContext): AuthUser => {
+        const request = ctx.switchToHttp().getRequest<Request>();
+        return request.user;
+    },
+);