feat: 添加频道管理功能，关联短剧与频道绑定逻辑

1. 新增频道模块，包含类型定义、实体、DTO、控制器和服务
2. 为短剧添加频道ID和频道名字段，支持关联频道
3. 新增短剧删除API和权限配置
4. 调整tsconfig和依赖配置，更新权限列表
5. 新增相关测试用例验证频道与短剧关联逻辑

test/dramas.e2e-spec.ts

@@ -24,6 +24,210 @@ describe('Dramas and episodes', () => {
     await app.close();
   });
 
+  it('lists the default channel for admin selectors', async () => {
+    const response = await request(app.getHttpServer())
+      .get('/api/admin/v1/channels')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .expect(200);
+
+    expect(response.body.data.list).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          id: expect.any(Number),
+          name: '默认频道',
+          code: 'default',
+          isDefault: true,
+          status: 'active',
+        }),
+      ]),
+    );
+  });
+
+  it('assigns dramas to the default channel when no channel is selected', async () => {
+    const dramaResponse = await request(app.getHttpServer())
+      .post('/api/admin/v1/dramas')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .send({
+        title: 'Default Channel Drama',
+        coverUrl: 'https://cdn.example.com/default-channel.jpg',
+        type: 'romance',
+        status: 'draft',
+      })
+      .expect(201);
+
+    expect(dramaResponse.body.data).toMatchObject({
+      title: 'Default Channel Drama',
+      channelId: expect.any(Number),
+      channelName: '默认频道',
+    });
+
+    const detail = await request(app.getHttpServer())
+      .get(`/api/admin/v1/dramas/${dramaResponse.body.data.id}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .expect(200);
+
+    expect(detail.body.data).toMatchObject({
+      id: dramaResponse.body.data.id,
+      channelId: dramaResponse.body.data.channelId,
+      channelName: '默认频道',
+    });
+  });
+
+  it('allows creating a drama without a type', async () => {
+    const response = await request(app.getHttpServer())
+      .post('/api/admin/v1/dramas')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .send({
+        title: 'No Type Drama',
+        coverUrl: 'https://cdn.example.com/no-type.jpg',
+        status: 'draft',
+      })
+      .expect(201);
+
+    expect(response.body.data).toMatchObject({
+      title: 'No Type Drama',
+      type: '',
+      channelName: '默认频道',
+    });
+  });
+
+  it('deletes a drama and its episodes from admin APIs', async () => {
+    const drama = await request(app.getHttpServer())
+      .post('/api/admin/v1/dramas')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .send({
+        title: 'Delete Drama Test',
+        coverUrl: 'https://cdn.example.com/delete-drama.jpg',
+        type: 'action',
+        status: 'draft',
+      })
+      .expect(201);
+
+    await request(app.getHttpServer())
+      .post('/api/admin/v1/episodes')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .send({
+        dramaId: drama.body.data.id,
+        episodeNo: 1,
+        title: 'Delete Episode',
+        coverUrl: 'https://cdn.example.com/delete-episode.jpg',
+        durationSeconds: 300,
+        status: 'draft',
+      })
+      .expect(201);
+
+    await request(app.getHttpServer())
+      .delete(`/api/admin/v1/dramas/${drama.body.data.id}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .expect(200);
+
+    await request(app.getHttpServer())
+      .get(`/api/admin/v1/dramas/${drama.body.data.id}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .expect(404);
+
+    const list = await request(app.getHttpServer())
+      .get('/api/admin/v1/dramas')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .query({ title: 'Delete Drama Test' })
+      .expect(200);
+
+    expect(list.body.data.list).toEqual([]);
+  });
+
+  it('supports assigning a drama to a selected channel and rejects missing channels', async () => {
+    const channelResponse = await request(app.getHttpServer())
+      .post('/api/admin/v1/channels')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .send({
+        name: '测试频道',
+        code: 'test-channel',
+        sortOrder: 10,
+      })
+      .expect(201);
+
+    const dramaResponse = await request(app.getHttpServer())
+      .post('/api/admin/v1/dramas')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .send({
+        title: 'Selected Channel Drama',
+        coverUrl: 'https://cdn.example.com/selected-channel.jpg',
+        type: 'action',
+        status: 'draft',
+        channelId: channelResponse.body.data.id,
+      })
+      .expect(201);
+
+    expect(dramaResponse.body.data).toMatchObject({
+      title: 'Selected Channel Drama',
+      channelId: channelResponse.body.data.id,
+      channelName: '测试频道',
+    });
+
+    await request(app.getHttpServer())
+      .post('/api/admin/v1/dramas')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .send({
+        title: 'Missing Channel Drama',
+        coverUrl: 'https://cdn.example.com/missing-channel.jpg',
+        type: 'action',
+        status: 'draft',
+        channelId: 999999,
+      })
+      .expect(404);
+  });
+
+  it('updates and deletes non-default channels but keeps the default channel protected', async () => {
+    const created = await request(app.getHttpServer())
+      .post('/api/admin/v1/channels')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .send({
+        name: '待编辑频道',
+        code: 'editable-channel',
+        sortOrder: 1,
+      })
+      .expect(201);
+
+    const updated = await request(app.getHttpServer())
+      .patch(`/api/admin/v1/channels/${created.body.data.id}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .send({
+        name: '已编辑频道',
+        sortOrder: 2,
+      })
+      .expect(200);
+
+    expect(updated.body.data).toMatchObject({
+      id: created.body.data.id,
+      name: '已编辑频道',
+      sortOrder: 2,
+    });
+
+    await request(app.getHttpServer())
+      .delete(`/api/admin/v1/channels/${created.body.data.id}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .expect(200);
+
+    const channels = await request(app.getHttpServer())
+      .get('/api/admin/v1/channels')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .expect(200);
+
+    expect(channels.body.data.list).not.toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({ code: 'editable-channel' }),
+      ]),
+    );
+
+    const defaultChannel = channels.body.data.list.find(
+      (channel: { code: string }) => channel.code === 'default',
+    );
+    await request(app.getHttpServer())
+      .delete(`/api/admin/v1/channels/${defaultChannel.id}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .expect(422);
+  });
+
   it('allows admin APIs to create a drama and episodes with release metadata', async () => {
     const dramaResponse = await request(app.getHttpServer())
       .post('/api/admin/v1/dramas')