feat: 初始提交

backend/app/repositories/system_config_repository.py

@@ -0,0 +1,18 @@
+from typing import Iterable, Optional
+
+from sqlalchemy import select
+
+from .base import BaseRepository
+from ..models import SystemConfig
+
+
+class SystemConfigRepository(BaseRepository[SystemConfig]):
+    model = SystemConfig
+
+    async def get_by_key(self, key: str) -> Optional[SystemConfig]:
+        result = await self.session.execute(select(SystemConfig).where(SystemConfig.key == key))
+        return result.scalars().first()
+
+    async def list_all(self) -> Iterable[SystemConfig]:
+        result = await self.session.execute(select(SystemConfig).order_by(SystemConfig.key))
+        return result.scalars().all()