Include TotalSummary in CRUD responses to eliminate redundant API calls

Backend changes:
- Add WithSummaryResponse wrappers for Task, TaskCompletion, and Residence CRUD
- Update services to return summary with all mutations (create, update, delete)
- Update handlers to pass through new response types
- Add getSummaryForUser helper for fetching summary in CRUD operations
- Wire ResidenceService into TaskService for summary access
- Add summary field to JoinResidenceResponse

This optimization eliminates the need for a separate getSummary() call after
every task/residence mutation, reducing network calls from 2 to 1.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

internal/services/residence_service.go

@@ -165,8 +165,17 @@ func (s *ResidenceService) GetSummary(userID uint) (*responses.TotalSummary, err
 	return summary, nil
 }
 
-// CreateResidence creates a new residence
-func (s *ResidenceService) CreateResidence(req *requests.CreateResidenceRequest, ownerID uint) (*responses.ResidenceResponse, error) {
+// getSummaryForUser is a helper that returns summary for a user, or empty summary on error
+func (s *ResidenceService) getSummaryForUser(userID uint) responses.TotalSummary {
+	summary, err := s.GetSummary(userID)
+	if err != nil || summary == nil {
+		return responses.TotalSummary{}
+	}
+	return *summary
+}
+
+// CreateResidence creates a new residence and returns it with updated summary
+func (s *ResidenceService) CreateResidence(req *requests.CreateResidenceRequest, ownerID uint) (*responses.ResidenceWithSummaryResponse, error) {
 	// TODO: Check subscription tier limits
 	// count, err := s.residenceRepo.CountByOwner(ownerID)
 	// if err != nil {
@@ -217,12 +226,17 @@ func (s *ResidenceService) CreateResidence(req *requests.CreateResidenceRequest,
 		return nil, err
 	}
 
-	resp := responses.NewResidenceResponse(residence)
-	return &resp, nil
+	// Get updated summary
+	summary := s.getSummaryForUser(ownerID)
+
+	return &responses.ResidenceWithSummaryResponse{
+		Data:    responses.NewResidenceResponse(residence),
+		Summary: summary,
+	}, nil
 }
 
-// UpdateResidence updates a residence
-func (s *ResidenceService) UpdateResidence(residenceID, userID uint, req *requests.UpdateResidenceRequest) (*responses.ResidenceResponse, error) {
+// UpdateResidence updates a residence and returns it with updated summary
+func (s *ResidenceService) UpdateResidence(residenceID, userID uint, req *requests.UpdateResidenceRequest) (*responses.ResidenceWithSummaryResponse, error) {
 	// Check ownership
 	isOwner, err := s.residenceRepo.IsOwner(residenceID, userID)
 	if err != nil {
@@ -303,22 +317,37 @@ func (s *ResidenceService) UpdateResidence(residenceID, userID uint, req *reques
 		return nil, err
 	}
 
-	resp := responses.NewResidenceResponse(residence)
-	return &resp, nil
+	// Get updated summary
+	summary := s.getSummaryForUser(userID)
+
+	return &responses.ResidenceWithSummaryResponse{
+		Data:    responses.NewResidenceResponse(residence),
+		Summary: summary,
+	}, nil
 }
 
-// DeleteResidence soft-deletes a residence
-func (s *ResidenceService) DeleteResidence(residenceID, userID uint) error {
+// DeleteResidence soft-deletes a residence and returns updated summary
+func (s *ResidenceService) DeleteResidence(residenceID, userID uint) (*responses.ResidenceDeleteWithSummaryResponse, error) {
 	// Check ownership
 	isOwner, err := s.residenceRepo.IsOwner(residenceID, userID)
 	if err != nil {
-		return err
+		return nil, err
 	}
 	if !isOwner {
-		return ErrNotResidenceOwner
+		return nil, ErrNotResidenceOwner
 	}
 
-	return s.residenceRepo.Delete(residenceID)
+	if err := s.residenceRepo.Delete(residenceID); err != nil {
+		return nil, err
+	}
+
+	// Get updated summary
+	summary := s.getSummaryForUser(userID)
+
+	return &responses.ResidenceDeleteWithSummaryResponse{
+		Data:    "residence deleted",
+		Summary: summary,
+	}, nil
 }
 
 // GenerateShareCode generates a new share code for a residence
@@ -427,9 +456,13 @@ func (s *ResidenceService) JoinWithCode(code string, userID uint) (*responses.Jo
 		return nil, err
 	}
 
+	// Get updated summary for the user
+	summary := s.getSummaryForUser(userID)
+
 	return &responses.JoinResidenceResponse{
 		Message:   "Successfully joined residence",
 		Residence: responses.NewResidenceResponse(residence),
+		Summary:   summary,
 	}, nil
 }