feat: 添加账号删除功能

backend/src/v1/users/router.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from fastapi import APIRouter, Depends, File, UploadFile
+from fastapi import APIRouter, Depends, File, Response, UploadFile
 
 from v1.users.dependencies import get_user_service
 from v1.users.schemas import (
@@ -54,3 +54,11 @@ async def upload_avatar(
     service: UserService = Depends(get_user_service),
 ) -> ProfileResponse:
     return await service.upload_avatar(file)
+
+
+@router.delete("/me", status_code=204)
+async def delete_my_account(
+    service: UserService = Depends(get_user_service),
+) -> Response:
+    await service.delete_account()
+    return Response(status_code=204)

backend/src/v1/users/service.py

@@ -290,6 +290,46 @@ class UserService:
         await self.repository.save()
         return await self.get_profile()
 
+    async def delete_account(self) -> None:
+        user_id = str(self.current_user.id)
+        avatar_bucket = config.storage.avatar.bucket
+        avatar_prefix = f"{self.current_user.id}/"
+
+        try:
+            await self.attachment_storage.delete_prefix(
+                bucket=avatar_bucket,
+                prefix=avatar_prefix,
+            )
+        except Exception as exc:
+            logger.exception(
+                "Account deletion failed while cleaning avatar objects",
+                user_id=user_id,
+                bucket=avatar_bucket,
+                prefix=avatar_prefix,
+            )
+            raise ApiProblemError(
+                status_code=502,
+                detail=problem_payload(
+                    code="PROFILE_DELETE_FAILED",
+                    detail="Failed to delete account data",
+                ),
+            ) from exc
+
+        try:
+            await self.attachment_storage.delete_auth_user(user_id=user_id)
+        except Exception as exc:
+            logger.exception(
+                "Account deletion failed while deleting auth user",
+                user_id=user_id,
+            )
+            raise ApiProblemError(
+                status_code=502,
+                detail=problem_payload(
+                    code="PROFILE_DELETE_FAILED",
+                    detail="Failed to delete account data",
+                ),
+            ) from exc
+
     async def _resolve_avatar_url(self, avatar_path: str | None) -> str | None:
         if avatar_path is None:
             return None