feat(albums): soft-delete albums (admin+owner, hidden & irreversible, both app entries)

契约 deleteAlbum（DELETE /albums/{albumId} → 204 幂等）+ status enum 'deleted'：
- 服务端：softDelete（canView 404→canManage 403 防枚举；乐观锁 claim +
  outbox album.updated priority=high + audit album.delete）；列表/详情/更新/
  成员/资产/分类/水印/照片/展示位绑定全部 deleted→404；公开端 cn
  （status!=='active'）与 ov（isAlbumVisibleOv）天然屏蔽；ov 副本经
  album.updated 载荷 status 直投自动下线
- Admin：列表表格操作「删除」+ 详情页头「删除相册」（确认含不可恢复说明）
- App：操作面板「删除相册」（红字、二次确认、成功退回列表并刷新）
- 验证：API 56/56、App 397/397（analyze 0）、admin typecheck/lint/test/build 绿

Co-Authored-By: Claude Code <noreply@anthropic.com>

services/api/test/ui01-contracts.e2e-spec.ts

@@ -624,4 +624,45 @@ describe('UI-01 契约扩展：cover / preview / scope=own (e2e)', () => {
       },
     });
   });
+
+  it('cover 回退 banner（宣传图/封面共用：仅 banner 相册 → cover=banner 对象）', async () => {
+    // 直种仅 banner 相册（复用本文件资产直种模式）。
+    const album = await prisma.albums.create({
+      data: {
+        publicToken: makePublicToken(),
+        ownerId: 'u-ui01-coverfb',
+        startAt: new Date('2026-10-03T02:00:00.000Z'),
+        endAt: new Date('2026-10-03T12:00:00.000Z'),
+        defaultLocale: 'zh-CN',
+      },
+    });
+    await prisma.album_translations.create({
+      data: { albumId: album.id, locale: 'zh-CN', title: '仅宣传图相册' },
+    });
+    const key = `photo-live/dev/albums/${album.id}/assets/u01assetbannerfb00000000.jpg`;
+    await putObject(key, Buffer.from([0x51, 0x52, 0x53]));
+    await prisma.album_assets.create({
+      data: {
+        id: 'u01assetbannerfb00000000',
+        albumId: album.id,
+        kind: 'banner',
+        locale: null,
+        objectKey: key,
+        state: 'effective',
+        expectedBytes: 3,
+        contentType: 'image/jpeg',
+      },
+    });
+
+    const res = await listAlbums(adminToken);
+    expect(res.status).toBe(200);
+    const item = (res.body.items as Array<{ id: string; cover: { url: string } | null }>).find(
+      (row) => row.id === album.id,
+    );
+    expect(item).toBeDefined();
+    expect(item?.cover).not.toBeNull();
+    const fetched = await fetch(item!.cover!.url);
+    expect(fetched.status).toBe(200);
+    expect(Buffer.from(await fetched.arrayBuffer()).length).toBe(3);
+  });
 });