fix: 리뷰 목록이 cursor null을 첫 페이지로 처리

src/features/review/dto/inputs/product-reviews.input.ts

@@ -30,7 +30,7 @@ export class ProductReviewsInput {
   @IsOptional()
   @IsString()
   @IsNotEmpty()
-  cursor?: string;
+  cursor?: string | null;
 
   @IsOptional()
   @IsInt()

src/features/review/dto/inputs/store-reviews.input.ts

@@ -30,7 +30,7 @@ export class StoreReviewsInput {
   @IsOptional()
   @IsString()
   @IsNotEmpty()
-  cursor?: string;
+  cursor?: string | null;
 
   @IsOptional()
   @IsInt()

src/features/review/services/review-listing.service.spec.ts

@@ -106,7 +106,7 @@ describe('ReviewListingService (real DB)', () => {
     args: {
       photoOnly?: boolean;
       sort?: 'LATEST' | 'LIKES';
-      cursor?: string;
+      cursor?: string | null;
       limit?: number;
     } = {},
     accountId?: bigint,
@@ -270,6 +270,18 @@ describe('ReviewListingService (real DB)', () => {
       );
     });
 
+    it.each(['LATEST', 'LIKES'] as const)(
+      'cursor null은 첫 페이지로 처리한다 (%s)',
+      async (sort) => {
+        const target = await makeTarget();
+        const review = await makeReview(target);
+
+        const result = await list(kind, target, { sort, cursor: null });
+
+        expect(result.items.map((r) => r.id)).toEqual([review.id.toString()]);
+      },
+    );
+
     it('cursor "0"은 페이지를 리셋하지 않고 빈 결과를 반환한다', async () => {
       const target = await makeTarget();
       await makeReview(target);

src/features/review/services/review-listing.service.ts

@@ -29,7 +29,7 @@ import type {
 interface ListingArgs {
   photoOnly?: boolean;
   sort?: ReviewSort;
-  cursor?: string;
+  cursor?: string | null;
   limit?: number;
 }
 
@@ -115,7 +115,8 @@ export class ReviewListingService {
         photoOnly,
         sort,
         limit,
-        cursorRaw: input.cursor,
+        // 명시적 cursor: null도 첫 페이지 요청이다
+        cursorRaw: input.cursor ?? undefined,
       }),
       this.repo.countReviews({ scope, photoOnly: false }),
       this.repo.countReviews({ scope, photoOnly: true }),