fix(recognize): 修复识别测试仅传数据源时被成对身份校验误拒，名称识别与临时识别词恢复生效

- 8bf2f601 引入的显式身份成对校验把'仅传 media_source'也视为显式身份，识别测试恒传数据源导致直接返回未识别
- 成对约束仅在显式传 media_id 时生效；仅传数据源时保留为请求级识别源约束，按名称在指定数据源内识别
- 字符串来源经 normalize_media_source 规范，meta 自带同源身份（如 {tmdbid=}）时优先按身份识别
- 新增 tests/test_recognize_source_selection.py 覆盖 source-only、同源身份采纳与成对拒绝场景

tests/test_recognize_source_selection.py

@@ -0,0 +1,146 @@
+# -*- coding: utf-8 -*-
+"""识别测试类请求的数据源选择回归测试。
+
+识别测试（名称测试）前端只传请求级数据源 media_source，不携带 media_id；
+该路径必须按名称在指定数据源内识别，而不是被"显式身份必须成对"规则拦截。
+"""
+import asyncio
+from unittest.mock import AsyncMock, Mock, patch
+
+from app.chain import ChainBase
+from app.domain.context import MediaInfo
+from app.domain.metainfo import MetaInfo
+from app.schemas.types import MediaSource, MediaType
+
+# 用户反馈的识别测试失败样例
+FAILING_TITLE = "[ANI] 關於我轉生變成史萊姆這檔事 第四季 - 90 [1080P][Baha][WEB-DL][AAC AVC][CHT].mp4"
+
+
+def _tmdb_media() -> MediaInfo:
+    """构造带 TMDB 身份的识别结果。"""
+    return MediaInfo(
+        media_source=MediaSource.TMDB,
+        media_id="120089",
+        tmdb_id=120089,
+        title="关于我转生变成史莱姆这档事",
+        type=MediaType.TV,
+    )
+
+
+def test_recognize_media_with_source_only_uses_name_search():
+    """仅传 media_source 时应按名称在指定数据源识别，不得直接拒绝。"""
+    chain = ChainBase()
+    meta = MetaInfo(FAILING_TITLE)
+    captured = {}
+
+    def fake_native(module_kwargs, cache):
+        captured.update(module_kwargs)
+        return _tmdb_media()
+
+    with patch.object(chain, "_run_native_media_recognize", side_effect=fake_native), \
+            patch.object(chain, "_supplement_media_recognize", side_effect=lambda **kw: kw["mediainfo"]), \
+            patch("app.chain.MoviePilotServerHelper"):
+        result = chain.recognize_media(meta=meta, media_source=MediaSource.TMDB, cache=False)
+
+    assert result is not None
+    assert result.tmdb_id == 120089
+    # 数据源约束透传到模块层，且无显式 ID
+    assert captured["media_source"] == MediaSource.TMDB
+    assert captured["media_id"] is None
+    # 名称识别应沿用 meta 推断的类型
+    assert captured["mtype"] == MediaType.TV
+
+
+def test_async_recognize_media_with_source_only_uses_name_search():
+    """异步入口与同步入口保持同一语义。"""
+    chain = ChainBase()
+    meta = MetaInfo(FAILING_TITLE)
+    captured = {}
+
+    async def fake_native(module_kwargs, cache):
+        captured.update(module_kwargs)
+        return _tmdb_media()
+
+    async def fake_supplement(**kwargs):
+        return kwargs["mediainfo"]
+
+    # 异步路径上报共享识别为协程，需要可 await 的桩
+    helper = Mock()
+    helper.async_report_recognize_share = AsyncMock()
+
+    with patch.object(chain, "_async_run_native_media_recognize", side_effect=fake_native), \
+            patch.object(chain, "_async_supplement_media_recognize", side_effect=fake_supplement), \
+            patch("app.chain.MoviePilotServerHelper", helper):
+        result = asyncio.run(
+            chain.async_recognize_media(meta=meta, media_source=MediaSource.TMDB, cache=False)
+        )
+
+    assert result is not None
+    assert result.tmdb_id == 120089
+    assert captured["media_source"] == MediaSource.TMDB
+    assert captured["media_id"] is None
+
+
+def test_recognize_media_accepts_string_source_only():
+    """第三方客户端可能传字符串数据源，应规范为枚举后按名称识别。"""
+    chain = ChainBase()
+    meta = MetaInfo(FAILING_TITLE)
+    captured = {}
+
+    def fake_native(module_kwargs, cache):
+        captured.update(module_kwargs)
+        return _tmdb_media()
+
+    with patch.object(chain, "_run_native_media_recognize", side_effect=fake_native), \
+            patch.object(chain, "_supplement_media_recognize", side_effect=lambda **kw: kw["mediainfo"]), \
+            patch("app.chain.MoviePilotServerHelper"):
+        result = chain.recognize_media(meta=meta, media_source="themoviedb", cache=False)
+
+    assert result is not None
+    assert captured["media_source"] == MediaSource.TMDB
+
+
+def test_recognize_media_meta_identity_same_source_uses_id():
+    """仅传数据源且 meta 自带同源身份（如 {tmdbid=}）时应直接按身份识别。"""
+    chain = ChainBase()
+    meta = MetaInfo("空之境界 第五章 矛盾螺旋 (2008) {tmdbid=23155}")
+    captured = {}
+
+    def fake_native(module_kwargs, cache):
+        captured.update(module_kwargs)
+        return _tmdb_media()
+
+    with patch.object(chain, "_run_native_media_recognize", side_effect=fake_native), \
+            patch.object(chain, "_supplement_media_recognize", side_effect=lambda **kw: kw["mediainfo"]), \
+            patch("app.chain.MoviePilotServerHelper"):
+        result = chain.recognize_media(meta=meta, media_source=MediaSource.TMDB, cache=False)
+
+    assert result is not None
+    assert captured["media_source"] == MediaSource.TMDB
+    assert captured["media_id"] == "23155"
+
+
+def test_recognize_media_media_id_without_source_still_rejected():
+    """显式 media_id 缺少有效来源时仍应拒绝，成对约束不放宽。"""
+    chain = ChainBase()
+    native = Mock()
+
+    with patch.object(chain, "_run_native_media_recognize", native):
+        result = chain.recognize_media(meta=MetaInfo("任意标题"), media_id="12345")
+
+    assert result is None
+    native.assert_not_called()
+
+
+def test_recognize_media_invalid_pair_still_rejected():
+    """media_id 为 0 等无效值与来源组合仍应拒绝。"""
+    chain = ChainBase()
+    native = Mock()
+
+    with patch.object(chain, "_run_native_media_recognize", native):
+        result = chain.recognize_media(
+            meta=MetaInfo("任意标题"), media_source=MediaSource.TMDB, media_id="0"
+        )
+
+    assert result is None
+    native.assert_not_called()