refactor: optimize backend module

domain/config/types.py

@@ -0,0 +1,23 @@
+from typing import Any, Optional
+
+from pydantic import BaseModel
+
+
+class ConfigItem(BaseModel):
+    key: str
+    value: Optional[Any] = None
+
+
+class SystemStatus(BaseModel):
+    version: str
+    title: str
+    logo: str
+    favicon: str
+    is_initialized: bool
+    app_domain: Optional[str] = None
+    file_domain: Optional[str] = None
+
+
+class LatestVersionInfo(BaseModel):
+    latest_version: Optional[str] = None
+    body: Optional[str] = None