Track all assigned IT Staff for My Tasks Tab

lib/screens/tasks/tasks_list_screen.dart

@@ -183,6 +183,14 @@ class _TasksListScreenState extends ConsumerState<TasksListScreen>
                   latestAssigneeByTaskId[entry.key] = entry.value.userId;
                 }
 
+                // Track ALL assigned users per task (not just latest) for "My Tasks" filtering
+                final assignedUsersByTaskId = <String, Set<String>>{};
+                for (final a in assignments) {
+                  assignedUsersByTaskId
+                      .putIfAbsent(a.taskId, () => <String>{})
+                      .add(a.userId);
+                }
+
                 final filteredTasks = _applyTaskFilters(
                   tasks,
                   ticketById: ticketById,
@@ -471,7 +479,10 @@ class _TasksListScreenState extends ConsumerState<TasksListScreen>
                     : filteredTasks
                           .where(
                             (t) =>
-                                latestAssigneeByTaskId[t.id] == currentUserId,
+                                assignedUsersByTaskId[t.id]?.contains(
+                                  currentUserId,
+                                ) ??
+                                false,
                           )
                           .toList();