refactor: complete runtime configuration migration

tests/test_music_search.py

@@ -1,4 +1,5 @@
 import asyncio
+from dataclasses import replace
 from unittest.mock import Mock, patch
 
 from app.chain.search import SearchChain
@@ -134,6 +135,10 @@ def test_music_search_matches_artist_from_resource_description():
 def test_music_stream_reports_site_progress_before_final_results(monkeypatch):
     """精确音乐搜索应逐站点输出进度事件，不能等待全部搜索完成后才返回。"""
     chain = SearchChain()
+    chain.runtime_config = replace(
+        chain.runtime_config,
+        search_multiple_name=False,
+    )
     music = MusicInfo(
         media_source="musicbrainz",
         media_id="recording-1",
@@ -194,8 +199,7 @@ def test_music_stream_reports_site_progress_before_final_results(monkeypatch):
         Mock(side_effect=AssertionError("音乐流式搜索不应回退到非流式站点搜索")),
     )
 
-    with patch("app.chain.search.settings.SEARCH_MULTIPLE_NAME", False):
-        events = asyncio.run(collect_events())
+    events = asyncio.run(collect_events())
 
     assert [event["value"] for event in events[:2]] == [50, 100]
     assert [event["finished"] for event in events[:2]] == [1, 2]