fix(jellyfin): fallback when collection type is missing

app/modules/jellyfin/jellyfin.py

@@ -356,7 +356,7 @@ class Jellyfin:
         优先遍历用户媒体库视图逐库统计：全局 `Items/Counts` 按数据库原始条目
         计数，同一影片在库内有多个版本/多个文件夹拷贝时会重复累计（#5915），
         而用户级 `Users/{user}/Items` 查询会折叠版本，与 Jellyfin 页面显示一致。
-        仅在用户视图不可用时回退到 `Items/Counts`。
+        仅在用户视图不可用或没有可识别媒体库时回退到 `Items/Counts`。
         :return: MovieCount SeriesCount EpisodeCount
         """
         if not self._host or not self._apikey:
@@ -392,7 +392,7 @@ class Jellyfin:
 
         `Users/{user}/Views` 每个媒体库仅返回一条记录（库包含多个文件夹时
         也不会重复），按 `CollectionType` 分桶后用用户级条目查询累计。
-        :return: 统计结果，用户或媒体库视图不可用时返回None（由调用方回退）
+        :return: 统计结果；用户、媒体库视图不可用或没有可识别媒体库时返回None（由调用方回退）
         """
         if not self.user:
             return None
@@ -400,19 +400,23 @@ class Jellyfin:
         if not librarys:
             return None
         stat = _SchemaStatistic()
+        has_known_library = False
         for library in librarys:
             library_id = library.get("Id")
             if not library_id:
                 continue
             collection_type = library.get("CollectionType")
             if collection_type == "movies":
+                has_known_library = True
                 stat.movie_count += self.get_items_count(library_id, include_item_types="Movie") or 0
             elif collection_type == "tvshows":
+                has_known_library = True
                 stat.tv_count += self.get_items_count(library_id, include_item_types="Series") or 0
                 stat.episode_count += self.get_items_count(library_id, include_item_types="Episode") or 0
             elif collection_type in ("music", "musicvideos"):
+                has_known_library = True
                 stat.music_count += self.get_items_count(library_id, include_item_types="MusicAlbum") or 0
-        return stat
+        return stat if has_known_library else None
 
     def __get_jellyfin_series_id_by_name(self, name: str, year: str) -> Optional[str]:
         """

tests/test_jellyfin_medias_count.py

@@ -106,6 +106,38 @@ def test_medias_count_falls_back_without_user():
     assert args[0] == "http://media.local/Items/Counts"
 
 
+def test_medias_count_falls_back_when_collection_type_missing():
+    """媒体库缺少 CollectionType 时应回退到全局 Items/Counts 统计。"""
+    client = _make_client()
+    views = {
+        "Items": [{
+            "Id": "lib-mixed",
+            "TypeOptions": ["Series", "Season", "Episode", "Movie"],
+        }]
+    }
+    global_counts = {
+        "MovieCount": 8,
+        "SeriesCount": 3,
+        "EpisodeCount": 24,
+        "MusicAlbumCount": 11,
+    }
+
+    with patch("app.modules.jellyfin.jellyfin.RequestUtils") as request_utils_cls:
+        request_utils_cls.return_value.get_res.side_effect = _routed_get_res(
+            views, {}, global_counts=global_counts
+        )
+        stat = client.get_medias_count()
+
+    assert stat.movie_count == 8
+    assert stat.tv_count == 3
+    assert stat.episode_count == 24
+    assert stat.music_count == 11
+    assert [call.args[0] for call in request_utils_cls.return_value.get_res.call_args_list] == [
+        "http://media.local/Users/user-id/Views",
+        "http://media.local/Items/Counts",
+    ]
+
+
 def test_medias_count_falls_back_when_views_unavailable():
     """媒体库视图查询失败时应回退到全局 Items/Counts 统计。"""
     client = _make_client()