refactor: unify music subscription data port

tests/test_architecture_dependencies.py

@@ -452,6 +452,21 @@ def test_user_and_messaging_chains_use_explicit_data_port_getters():
     assert violations == []
 
 
+def test_music_chain_uses_explicit_subscribe_data_port_getter():
+    """音乐订阅链不得把 SubscribePortProxy 伪装成 SubscribeOper。"""
+    path = APP_ROOT / "chain" / "_music.py"
+    tree = ast.parse(path.read_text(encoding="utf-8-sig"), filename=str(path))
+    violations = [
+        f"{path.relative_to(PROJECT_ROOT).as_posix()}:{node.lineno}"
+        for node in ast.walk(tree)
+        if isinstance(node, ast.ImportFrom)
+        and node.module == "app.application.chain.data"
+        and any(alias.name == "SubscribePortProxy" for alias in node.names)
+    ]
+
+    assert violations == []
+
+
 def test_plugin_components_do_not_reexport_legacy_abi_names():
     """新插件组件只提供 canonical 能力，不得复制旧 Helper、Manager 或 Oper 导出。"""
     violations: list[str] = []

tests/test_music_subscribe.py

@@ -134,7 +134,7 @@ def test_music_subscribe_reuses_search_download_and_finish_flow():
     with patch.object(SubscribeChain, "_recognize_music_subscribe", return_value=target), \
             patch("app.chain._music.SearchChain", return_value=search_chain), \
             patch("app.chain._music.DownloadChain", return_value=download_chain), \
-            patch("app.chain._music.SubscribeOper") as subscribe_oper:
+            patch("app.chain._music.get_chain_subscribe_port") as subscribe_oper:
         subscribe_oper.return_value.get.return_value = subscribe
         chain._search_music_subscribe(subscribe)
 
@@ -240,7 +240,7 @@ def test_music_best_version_persists_downloaded_rule_priority():
     chain.finish_subscribe_or_not = Mock()
 
     with patch("app.chain._music.DownloadChain", return_value=download_chain), \
-            patch("app.chain._music.SubscribeOper", return_value=subscribe_oper):
+            patch("app.chain._music.get_chain_subscribe_port", return_value=subscribe_oper):
         chain._download_music_subscribe(subscribe, _music_info(), [downloaded])
 
     subscribe_oper.update.assert_called_once_with(
@@ -441,7 +441,7 @@ def test_music_rss_match_reuses_cached_context_without_second_site_search():
     torrent_helper.filter_torrent.return_value = True
     with patch.object(SubscribeChain, "_recognize_music_subscribe", return_value=target), \
             patch("app.chain.subscribe.SubscribeOper", return_value=subscribe_oper), \
-            patch("app.chain._music.SubscribeOper", return_value=subscribe_oper), \
+            patch("app.chain._music.get_chain_subscribe_port", return_value=subscribe_oper), \
             patch("app.chain._music.TorrentHelper", return_value=torrent_helper), \
             patch("app.chain._music.DownloadChain", return_value=download_chain), \
             patch("app.chain.subscribe.SearchChain") as search_chain, \
@@ -638,7 +638,7 @@ def test_recording_target_sync_clears_stale_album_track_count():
     subscribe = _subscribe(total_tracks=11)
     subscribe_oper = Mock()
 
-    with patch("app.chain._music.SubscribeOper", return_value=subscribe_oper):
+    with patch("app.chain._music.get_chain_subscribe_port", return_value=subscribe_oper):
         SubscribeChain._sync_music_subscribe_target(subscribe, _music_info())
 
     subscribe_oper.update.assert_called_once_with(subscribe.id, {"total_tracks": None})