add recorator

src/common/decorators/index.ts

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+export { UserId } from './user-id.decorator';
+export { RestId } from './rest-id.decorator';
+export { RateLimit } from './rate-limit.decorator';

src/common/decorators/rest-id.decorator.ts

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+import { createParamDecorator, type ExecutionContext } from '@nestjs/common';
+import type { Request } from 'express';
+
+/**
+ * Decorator to extract restId from the authenticated request.
+ * Must be used after AdminAuthGuard or AuthGuard that sets request.restId.
+ *
+ * @example
+ * @Get('/restaurants')
+ * @UseGuards(AdminAuthGuard)
+ * getRestaurants(@RestId() restId: string) {
+ *   return this.restaurantService.findById(restId);
+ * }
+ */
+export const RestId = createParamDecorator((data: unknown, ctx: ExecutionContext): string => {
+  const request = ctx.switchToHttp().getRequest<Request & { restId?: string }>();
+  return request.restId || '';
+});

src/common/decorators/user-id.decorator.ts

@@ -0,0 +1,18 @@
+import { createParamDecorator, type ExecutionContext } from '@nestjs/common';
+import type { Request } from 'express';
+
+/**
+ * Decorator to extract userId from the authenticated request.
+ * Must be used after AdminAuthGuard or AuthGuard that sets request.userId.
+ *
+ * @example
+ * @Get('/profile')
+ * @UseGuards(AdminAuthGuard)
+ * getProfile(@UserId() userId: string) {
+ *   return this.userService.findById(userId);
+ * }
+ */
+export const UserId = createParamDecorator((data: unknown, ctx: ExecutionContext): string => {
+  const request = ctx.switchToHttp().getRequest<Request & { userId?: string }>();
+  return request.userId || '';
+});