feat(agent): complete music workflow support

app/schemas/history.py

@@ -81,7 +81,7 @@ class TransferHistory(BaseModel):
     dest: Optional[str] = None
     # 转移模式
     mode: Optional[str] = None
-    # 类型：电影、电视剧
+    # 类型：电影、电视剧、音乐
     type: Optional[str] = None
     # 二级分类
     category: Optional[str] = None
@@ -105,6 +105,10 @@ class TransferHistory(BaseModel):
     media_source: Optional[str] = None
     # 数据源原生ID
     media_id: Optional[str] = None
+    # 音乐实体类型：recording 单曲、album 专辑
+    music_type: Optional[str] = None
+    # 专辑预期总曲目数
+    total_tracks: Optional[int] = None
     # 季Sxx
     seasons: Optional[str] = None
     # 集Exx

app/schemas/types.py

@@ -30,11 +30,16 @@ class MediaType(Enum):
 
 
 def media_type_to_agent(value) -> Optional[str]:
-    """将 MediaType 枚举或字符串统一转换为 Agent 媒体类型。"""
+    """将枚举、Agent 键或数据库枚举值统一转换为 Agent 媒体类型。"""
     if isinstance(value, MediaType):
         return value.to_agent()
     if isinstance(value, str):
         mt = MediaType.from_agent(value)
+        if not mt:
+            try:
+                mt = MediaType(value)
+            except ValueError:
+                pass
         return mt.to_agent() if mt else value
     return None