refactor(media): unify frontend media identity

tests/support/factories/subscribe.ts

@@ -30,7 +30,8 @@ export function createSubscribe(overrides: Partial<Subscribe> = {}): Subscribe {
     show_edit_dialog: false,
     sites: [],
     state: 'R',
-    tmdbid: subscribeSeed,
+    media_id: String(subscribeSeed),
+    media_source: 'themoviedb',
     type: '电影',
     username: 'tester',
     year: '2026',
@@ -53,7 +54,8 @@ export function createSubscribeShare(overrides: Partial<SubscribeShare> = {}): S
     share_uid: `share-user-${subscribeShareSeed}`,
     share_user: `分享用户 ${subscribeShareSeed}`,
     subscribe_id: subscribeShareSeed + 1000,
-    tmdbid: subscribeShareSeed,
+    media_id: String(subscribeShareSeed),
+    media_source: 'themoviedb',
     type: '电影',
     vote: 8.2,
     year: '2026',