feat(drag-and-drop): enhance task grouping updates and socket event handling

- Updated the `useDragAndDrop` hook to emit specific grouping field change events (phase, priority, status) when tasks are moved between groups.
- Refactored the task management slice to prevent direct updates to task grouping fields during drag-and-drop operations, ensuring these updates are handled via socket events after backend confirmation.
- Introduced a new socket handler for task sort order changes to update task properties based on backend responses, improving synchronization between frontend and backend task states.

worklenz-frontend/src/components/task-list-v2/hooks/useDragAndDrop.ts

@@ -37,7 +37,7 @@ export const useDragAndDrop = (allTasks: Task[], groups: TaskGroup[]) => {
       const teamId = currentSession?.team_id || '';
 
       // Use new bulk update approach - recalculate ALL task orders to prevent duplicates
-      const taskUpdates = [];
+      const taskUpdates: any[] = [];
       
       // Create a copy of all groups and perform the move operation
       const updatedGroups = groups.map(group => ({
@@ -108,6 +108,32 @@ export const useDragAndDrop = (allTasks: Task[], groups: TaskGroup[]) => {
 
       console.log('Emitting TASK_SORT_ORDER_CHANGE:', socketData);
       socket.emit(SocketEvents.TASK_SORT_ORDER_CHANGE.toString(), socketData);
+
+      // Also emit the specific grouping field change event for the moved task
+      if (sourceGroup.id !== targetGroup.id) {
+        if (currentGrouping === 'phase') {
+          // Emit phase change event
+          socket.emit(SocketEvents.TASK_PHASE_CHANGE.toString(), {
+            task_id: taskId,
+            phase_id: targetGroup.id,
+            parent_task: task.parent_task_id || null,
+          });
+        } else if (currentGrouping === 'priority') {
+          // Emit priority change event
+          socket.emit(SocketEvents.TASK_PRIORITY_CHANGE.toString(), JSON.stringify({
+            task_id: taskId,
+            priority_id: targetGroup.id,
+            team_id: teamId,
+          }));
+        } else if (currentGrouping === 'status') {
+          // Emit status change event
+          socket.emit(SocketEvents.TASK_STATUS_CHANGE.toString(), JSON.stringify({
+            task_id: taskId,
+            status_id: targetGroup.id,
+            team_id: teamId,
+          }));
+        }
+      }
     },
     [socket, connected, projectId, allTasks, groups, currentGrouping, currentSession]
   );

worklenz-frontend/src/features/task-management/task-management.slice.ts

@@ -686,42 +686,8 @@ const taskManagementSlice = createSlice({
             destinationGroup.taskIds.push(sourceTaskId); // Add to end if destination task not found
           }
 
-          // Update task's grouping field to reflect new group (e.g., status, priority, phase)
-          // This assumes the group ID directly corresponds to the task's field value
-          if (sourceTask) {
-            let updatedTask = { ...sourceTask };
-            switch (state.grouping?.id) {
-              case IGroupBy.STATUS:
-                updatedTask.status = destinationGroup.id;
-                break;
-              case IGroupBy.PRIORITY:
-                updatedTask.priority = destinationGroup.id;
-                break;
-              case IGroupBy.PHASE:
-                // Handle unmapped group specially
-                if (destinationGroup.id === 'Unmapped' || destinationGroup.title === 'Unmapped') {
-                  updatedTask.phase = ''; // Clear phase for unmapped group
-                } else {
-                  updatedTask.phase = destinationGroup.id;
-                }
-                break;
-              case IGroupBy.MEMBERS:
-                // If moving to a member group, ensure task is assigned to that member
-                // This assumes the group ID is the member ID
-                if (!updatedTask.assignees) {
-                  updatedTask.assignees = [];
-                }
-                if (!updatedTask.assignees.includes(destinationGroup.id)) {
-                  updatedTask.assignees.push(destinationGroup.id);
-                }
-                // If moving from a member group, and the task is no longer in any member group,
-                // consider removing the assignment (more complex logic might be needed here)
-                break;
-              default:
-                break;
-            }
-            newEntities[sourceTaskId] = updatedTask;
-          }
+          // Do NOT update the task's grouping field (priority, phase, status) here.
+          // This will be handled by the socket event handler after backend confirmation.
 
           // Update order for affected tasks in both groups using the appropriate sort field
           const sortField = getSortOrderField(state.grouping?.id);

worklenz-frontend/src/hooks/useTaskSocketHandlers.ts

@@ -989,6 +989,71 @@ export const useTaskSocketHandlers = () => {
     }
   }, [dispatch]);
 
+  // Handler for task sort order change events
+  const handleTaskSortOrderChange = useCallback((data: any[]) => {
+    try {
+      if (!Array.isArray(data) || data.length === 0) return;
+
+      // DEBUG: Log the data received from the backend
+      console.log('[TASK_SORT_ORDER_CHANGE] Received data:', data);
+
+      // Get canonical lists from Redux
+      const state = store.getState();
+      const priorityList = state.priorityReducer?.priorities || [];
+      const phaseList = state.phaseReducer?.phaseList || [];
+      const statusList = state.taskStatusReducer?.status || [];
+
+      // The backend sends an array of tasks with updated sort orders and possibly grouping fields
+      data.forEach((taskData: any) => {
+        const currentTask = state.taskManagement.entities[taskData.id];
+        if (currentTask) {
+          let updatedTask: Task = {
+            ...currentTask,
+            order: taskData.sort_order || taskData.current_sort_order || currentTask.order,
+            updatedAt: new Date().toISOString(),
+            updated_at: new Date().toISOString(),
+          };
+
+          // Update grouping fields if present
+          if (typeof taskData.priority_id !== 'undefined') {
+            const found = priorityList.find(p => p.id === taskData.priority_id);
+            if (found) {
+              updatedTask.priority = found.name;
+              // updatedTask.priority_id = found.id; // Only if Task type has priority_id
+            } else {
+              updatedTask.priority = taskData.priority_id || '';
+              // updatedTask.priority_id = taskData.priority_id;
+            }
+          }
+          if (typeof taskData.phase_id !== 'undefined') {
+            const found = phaseList.find(p => p.id === taskData.phase_id);
+            if (found) {
+              updatedTask.phase = found.name;
+              // updatedTask.phase_id = found.id; // Only if Task type has phase_id
+            } else {
+              updatedTask.phase = taskData.phase_id || '';
+              // updatedTask.phase_id = taskData.phase_id;
+            }
+          }
+          if (typeof taskData.status_id !== 'undefined') {
+            const found = statusList.find(s => s.id === taskData.status_id);
+            if (found) {
+              updatedTask.status = found.name;
+              // updatedTask.status_id = found.id; // Only if Task type has status_id
+            } else {
+              updatedTask.status = taskData.status_id || '';
+              // updatedTask.status_id = taskData.status_id;
+            }
+          }
+
+          dispatch(updateTask(updatedTask));
+        }
+      });
+    } catch (error) {
+      logger.error('Error handling task sort order change event:', error);
+    }
+  }, [dispatch]);
+
   // Register socket event listeners
   useEffect(() => {
     if (!socket) return;
@@ -1022,6 +1087,7 @@ export const useTaskSocketHandlers = () => {
       { event: SocketEvents.TASK_CUSTOM_COLUMN_UPDATE.toString(), handler: handleCustomColumnUpdate },
       { event: SocketEvents.TASK_TIMER_START.toString(), handler: handleTimerStart },
       { event: SocketEvents.TASK_TIMER_STOP.toString(), handler: handleTimerStop },
+      { event: SocketEvents.TASK_SORT_ORDER_CHANGE.toString(), handler: handleTaskSortOrderChange },
 
     ];
 
@@ -1056,6 +1122,7 @@ export const useTaskSocketHandlers = () => {
     handleCustomColumnUpdate,
     handleTimerStart,
     handleTimerStop,
+    handleTaskSortOrderChange,
 
   ]);
 };