feat(music): complete album subscription workflow

tests/test_music_search.py

@@ -19,7 +19,12 @@ def test_music_context_builder_keeps_only_music_category():
     )
     torrents = [
         TorrentInfo(
-            title="Daft Punk - Random Access Memories FLAC",
+            title="Daft Punk - Get Lucky - Random Access Memories FLAC",
+            category=MediaType.MUSIC.value,
+            site_name="MusicSite",
+        ),
+        TorrentInfo(
+            title="Daft Punk - Discovery FLAC",
             category=MediaType.MUSIC.value,
             site_name="MusicSite",
         ),
@@ -44,6 +49,39 @@ def test_music_context_builder_keeps_only_music_category():
     assert contexts[0].torrent_info.category == MediaType.MUSIC.value
 
 
+def test_music_search_continues_after_unrelated_first_keyword_results():
+    """首组关键词只命中其它专辑时应继续尝试后续关键词，不能提前返回空结果。"""
+    chain = SearchChain()
+    music = MusicInfo(
+        source="musicbrainz",
+        media_id="recording-1",
+        title="Get Lucky",
+        artists=["Daft Punk"],
+        album="Random Access Memories",
+    )
+    unrelated = TorrentInfo(
+        title="Daft Punk - Discovery FLAC",
+        category=MediaType.MUSIC.value,
+        site_name="MusicSite",
+    )
+    matched = TorrentInfo(
+        title="Daft Punk - Get Lucky FLAC",
+        category=MediaType.MUSIC.value,
+        site_name="MusicSite",
+    )
+
+    with patch.object(
+            chain,
+            "_SearchChain__search_all_sites",
+            side_effect=[[unrelated], [matched]],
+    ) as search_sites, patch("app.chain.search.time.sleep"):
+        contexts = chain._process_music(music, rule_groups=[])
+
+    assert search_sites.call_count == 2
+    assert len(contexts) == 1
+    assert contexts[0].torrent_info.title == matched.title
+
+
 def test_search_by_id_routes_music_identity_to_recognize_and_process():
     """MusicBrainz 精确身份搜索应经统一识别入口识别后进入现有搜索处理链。"""
     chain = SearchChain()