feat: enhance backup functionality with section selection and import mode options

domain/backup/api.py

@@ -1,6 +1,6 @@
 import datetime
 
-from fastapi import APIRouter, Depends, File, Request, UploadFile
+from fastapi import APIRouter, Depends, File, Form, Query, Request, UploadFile
 from fastapi.responses import JSONResponse
 
 from domain.audit import AuditAction, audit
@@ -16,8 +16,10 @@ router = APIRouter(
 
 @router.get("/export", summary="导出全站数据")
 @audit(action=AuditAction.DOWNLOAD, description="导出备份")
-async def export_backup(request: Request):
-    data = await BackupService.export_data()
+async def export_backup(
+    request: Request, sections: list[str] | None = Query(default=None)
+):
+    data = await BackupService.export_data(sections=sections)
     timestamp = datetime.datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
     headers = {"Content-Disposition": f"attachment; filename=foxel_backup_{timestamp}.json"}
     return JSONResponse(content=data.model_dump(), headers=headers)
@@ -25,6 +27,10 @@ async def export_backup(request: Request):
 
 @router.post("/import", summary="导入数据")
 @audit(action=AuditAction.UPLOAD, description="导入备份")
-async def import_backup(request: Request, file: UploadFile = File(...)):
-    await BackupService.import_from_bytes(file.filename, await file.read())
+async def import_backup(
+    request: Request,
+    file: UploadFile = File(...),
+    mode: str = Form("replace"),
+):
+    await BackupService.import_from_bytes(file.filename, await file.read(), mode=mode)
     return {"message": "数据导入成功。"}