refactor: 推进后端分层架构治理

app/chain/dashboard.py

@@ -1,6 +1,7 @@
 from typing import Optional, List
 
-from app import schemas
+from app.schemas.dashboard import DownloaderInfo as _SchemaDownloaderInfo
+from app.schemas.dashboard import Statistic as _SchemaStatistic
 from app.chain import ChainBase
 
 
@@ -8,13 +9,13 @@ class DashboardChain(ChainBase):
     """
     各类仪表板统计处理链
     """
-    def media_statistic(self, server: Optional[str] = None) -> Optional[List[schemas.Statistic]]:
+    def media_statistic(self, server: Optional[str] = None) -> Optional[List[_SchemaStatistic]]:
         """
         媒体数量统计
         """
         return self.run_module("media_statistic", server=server)
 
-    def downloader_info(self, downloader: Optional[str] = None) -> Optional[List[schemas.DownloaderInfo]]:
+    def downloader_info(self, downloader: Optional[str] = None) -> Optional[List[_SchemaDownloaderInfo]]:
         """
         下载器信息
         """