feat(backend): 重构 HTTP 错误处理为 RFC7807 标准并优化多个 service

backend/tests/unit/v1/schedule_items/test_service.py

@@ -3,7 +3,7 @@ from unittest.mock import AsyncMock, MagicMock
 from uuid import UUID, uuid4
 
 import pytest
-from fastapi import HTTPException
+from core.http.errors import ApiProblemError
 from sqlalchemy.exc import SQLAlchemyError
 
 from core.auth.models import CurrentUser
@@ -198,7 +198,7 @@ async def test_create_invalid_end_at(
         inbox_repository=mock_inbox_repository,
     )
 
-    with pytest.raises(HTTPException) as exc_info:
+    with pytest.raises(ApiProblemError) as exc_info:
         await service.create(request)
 
     assert exc_info.value.status_code == 400
@@ -234,7 +234,7 @@ async def test_get_by_id_not_found(
         inbox_repository=mock_inbox_repository,
     )
 
-    with pytest.raises(HTTPException) as exc_info:
+    with pytest.raises(ApiProblemError) as exc_info:
         await service.get_by_id(uuid4())
 
     assert exc_info.value.status_code == 404
@@ -489,7 +489,7 @@ async def test_list_by_date_range_rolls_back_when_query_fails_after_archive(
         inbox_repository=mock_inbox_repository,
     )
 
-    with pytest.raises(HTTPException) as exc_info:
+    with pytest.raises(ApiProblemError) as exc_info:
         await service.list_by_date_range(
             request=ScheduleItemListRequest(
                 start_at=datetime(2026, 2, 1, 0, 0, tzinfo=timezone.utc),