feat: 初始提交

backend/app/repositories/admin_setting_repository.py

@@ -0,0 +1,15 @@
+from typing import Optional
+
+from sqlalchemy import select
+
+from .base import BaseRepository
+from ..models import AdminSetting
+
+
+class AdminSettingRepository(BaseRepository[AdminSetting]):
+    model = AdminSetting
+
+    async def get_value(self, key: str) -> Optional[str]:
+        result = await self.session.execute(select(AdminSetting).where(AdminSetting.key == key))
+        record = result.scalars().first()
+        return record.value if record else None