feat(dramas): add play count field for drama records

1. 新增plays字段到DramaRecord接口和swagger/openapi文档
2. 在剧集创建时默认设置plays为0
3. 新增getPlayCountsByDramaIds方法聚合剧集播放量
4. 在后台和前台剧集列表中添加播放量数据
5. 更新测试用例适配新增的plays字段

test/database-persistence.e2e-spec.ts

@@ -8,6 +8,15 @@ import { UsersService } from '../src/modules/users/users.service';
 
 function createRepository<T extends { id?: number }>() {
   const records: T[] = [];
+  const matchesWhere = (item: T, where?: Partial<T>) => {
+    if (!where) {
+      return true;
+    }
+    return Object.entries(where).every(
+      ([key, value]) => item[key as keyof T] === value,
+    );
+  };
+
   return {
     records,
     create: jest.fn((input: Partial<T>) => input as T),
@@ -24,14 +33,18 @@ function createRepository<T extends { id?: number }>() {
       return input;
     }),
     findOne: jest.fn(async ({ where }: { where: Partial<T> }) =>
-      records.find((item) =>
-        Object.entries(where).every(
-          ([key, value]) => item[key as keyof T] === value,
-        ),
-      ) ?? null,
+      records.find((item) => matchesWhere(item, where)) ?? null,
     ),
     find: jest.fn(async () => [...records]),
-    count: jest.fn(async () => records.length),
+    findAndCount: jest.fn(
+      async ({ where, skip = 0, take = records.length }: { where?: Partial<T>; skip?: number; take?: number }) => {
+        const filtered = records.filter((item) => matchesWhere(item, where));
+        return [filtered.slice(skip, skip + take), filtered.length];
+      },
+    ),
+    count: jest.fn(async ({ where }: { where?: Partial<T> } = {}) =>
+      records.filter((item) => matchesWhere(item, where)).length,
+    ),
   };
 }
 
@@ -182,4 +195,72 @@ describe('database-backed persistence', () => {
     expect(episodeMetricRepository.save).toHaveBeenCalled();
     expect(syncJobRepository.save).toHaveBeenCalled();
   });
+
+  it('aggregates episode metric plays for database-backed drama lists', async () => {
+    const now = new Date('2026-07-02T00:00:00.000Z');
+    const dramaRepository = createRepository<any>();
+    const episodeRepository = createRepository<any>();
+    const queryBuilder = {
+      select: jest.fn().mockReturnThis(),
+      addSelect: jest.fn().mockReturnThis(),
+      where: jest.fn().mockReturnThis(),
+      groupBy: jest.fn().mockReturnThis(),
+      getRawMany: jest.fn(async () => [{ dramaId: '1', plays: '321' }]),
+    };
+    const episodeMetricRepository = {
+      createQueryBuilder: jest.fn(() => queryBuilder),
+    };
+    const dataSource = createDataSource({
+      Drama: dramaRepository,
+      Episode: episodeRepository,
+      EpisodeMetric: episodeMetricRepository,
+    });
+    const service = new DramasService(dataSource as never);
+
+    await dramaRepository.save({
+      id: 1,
+      title: 'DB Plays Drama',
+      coverUrl: 'https://cdn.example.com/db-plays.jpg',
+      type: 'action',
+      tags: [],
+      status: PublishStatus.Published,
+      sortOrder: 0,
+      isRecommended: false,
+      onlineVersion: 1,
+      createdAt: now,
+      updatedAt: now,
+    });
+    await episodeRepository.save({
+      id: 1,
+      dramaId: 1,
+      episodeNo: 1,
+      title: 'Episode 1',
+      coverUrl: 'https://cdn.example.com/ep1.jpg',
+      durationSeconds: 180,
+      isPaid: false,
+      freeType: 'free',
+      price: 0,
+      status: PublishStatus.Published,
+      publishStatus: PublishStatus.Published,
+      reviewStatus: 'approved',
+      createdAt: now,
+      updatedAt: now,
+    });
+
+    const adminList = await service.listAdminDramas({ page: 1, pageSize: 10 });
+    const appList = await service.listPublishedDramas({ page: 1, pageSize: 10 });
+
+    expect(adminList.list[0]).toMatchObject({
+      title: 'DB Plays Drama',
+      plays: 321,
+    });
+    expect(appList.list[0]).toMatchObject({
+      title: 'DB Plays Drama',
+      plays: 321,
+    });
+    expect(queryBuilder.where).toHaveBeenCalledWith(
+      'metric.dramaId IN (:...dramaIds)',
+      { dramaIds: [1] },
+    );
+  });
 });