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/handlers/task_handler.go

@@ -156,7 +156,7 @@ func (h *TaskHandler) DeleteTask(c *gin.Context) {
 		return
 	}
 
-	err = h.taskService.DeleteTask(uint(taskID), user.ID)
+	response, err := h.taskService.DeleteTask(uint(taskID), user.ID)
 	if err != nil {
 		switch {
 		case errors.Is(err, services.ErrTaskNotFound):
@@ -168,7 +168,7 @@ func (h *TaskHandler) DeleteTask(c *gin.Context) {
 		}
 		return
 	}
-	c.JSON(http.StatusOK, gin.H{"message": i18n.LocalizedMessage(c, "message.task_deleted")})
+	c.JSON(http.StatusOK, response)
 }
 
 // MarkInProgress handles POST /api/tasks/:id/mark-in-progress/
@@ -192,7 +192,7 @@ func (h *TaskHandler) MarkInProgress(c *gin.Context) {
 		}
 		return
 	}
-	c.JSON(http.StatusOK, gin.H{"message": i18n.LocalizedMessage(c, "message.task_in_progress"), "task": response})
+	c.JSON(http.StatusOK, response)
 }
 
 // CancelTask handles POST /api/tasks/:id/cancel/
@@ -218,7 +218,7 @@ func (h *TaskHandler) CancelTask(c *gin.Context) {
 		}
 		return
 	}
-	c.JSON(http.StatusOK, gin.H{"message": i18n.LocalizedMessage(c, "message.task_cancelled"), "task": response})
+	c.JSON(http.StatusOK, response)
 }
 
 // UncancelTask handles POST /api/tasks/:id/uncancel/
@@ -242,7 +242,7 @@ func (h *TaskHandler) UncancelTask(c *gin.Context) {
 		}
 		return
 	}
-	c.JSON(http.StatusOK, gin.H{"message": i18n.LocalizedMessage(c, "message.task_uncancelled"), "task": response})
+	c.JSON(http.StatusOK, response)
 }
 
 // ArchiveTask handles POST /api/tasks/:id/archive/
@@ -268,7 +268,7 @@ func (h *TaskHandler) ArchiveTask(c *gin.Context) {
 		}
 		return
 	}
-	c.JSON(http.StatusOK, gin.H{"message": i18n.LocalizedMessage(c, "message.task_archived"), "task": response})
+	c.JSON(http.StatusOK, response)
 }
 
 // UnarchiveTask handles POST /api/tasks/:id/unarchive/
@@ -292,7 +292,7 @@ func (h *TaskHandler) UnarchiveTask(c *gin.Context) {
 		}
 		return
 	}
-	c.JSON(http.StatusOK, gin.H{"message": i18n.LocalizedMessage(c, "message.task_unarchived"), "task": response})
+	c.JSON(http.StatusOK, response)
 }
 
 // === Task Completions ===
@@ -455,7 +455,7 @@ func (h *TaskHandler) DeleteCompletion(c *gin.Context) {
 		return
 	}
 
-	err = h.taskService.DeleteCompletion(uint(completionID), user.ID)
+	response, err := h.taskService.DeleteCompletion(uint(completionID), user.ID)
 	if err != nil {
 		switch {
 		case errors.Is(err, services.ErrCompletionNotFound):
@@ -467,7 +467,7 @@ func (h *TaskHandler) DeleteCompletion(c *gin.Context) {
 		}
 		return
 	}
-	c.JSON(http.StatusOK, gin.H{"message": i18n.LocalizedMessage(c, "message.completion_deleted")})
+	c.JSON(http.StatusOK, response)
 }
 
 // === Lookups ===