feat(集数映射): 作品季集结构字段(迁移 0075)、剧集组接口契约与按 TMDB 默认季集换算

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Cxwgnn2pbzQ7rXv3rq7fei

packages/contracts/src/content.ts

@@ -25,6 +25,11 @@ export const MediaEntity = EntityBase.extend({
   lastMetadataRefreshAt: Timestamp.nullable(),
   /** 作品级命名模板覆盖 {movie?, tv?, variety?}(见 settings NamingOverride);null = 不覆盖。经 PUT /media-entities/{id}/naming-override 修改 */
   namingOverride: JsonObject.nullable().optional(),
+  /** 季集结构:TMDB 剧集组 id / 名称;null = TMDB 默认季。经 PUT /media-entities/{id}/episode-group 修改 */
+  episodeGroupId: z.string().nullable().optional(),
+  episodeGroupName: z.string().nullable().optional(),
+  episodeGroupSetAt: Timestamp.nullable().optional(),
+  episodeGroupSetBy: z.string().nullable().optional(),
 });
 export type MediaEntity = z.infer<typeof MediaEntity>;
 export const MediaEntityCreate = MediaEntity.pick({