feat(tasks): implement V3 API for task management and enhance UI components

- Introduced `getTasksV3` and `refreshTaskProgress` methods in `TasksControllerV2` to optimize task retrieval and progress refreshing.
- Updated API routes to include new endpoints for V3 task management.
- Enhanced frontend components to utilize the new V3 API, improving performance by reducing frontend processing.
- Added `VirtualizedTaskList` and `VirtualizedTaskGroup` components for efficient rendering of task lists.
- Updated task management slice to support new V3 data structure and improved state management.
- Refactored styles for better dark mode support and overall UI consistency.

worklenz-frontend/src/components/task-management/task-group.tsx

@@ -31,7 +31,6 @@ const GROUP_COLORS = {
     done: '#52c41a',
   },
   priority: {
-    critical: '#ff4d4f',
     high: '#fa8c16',
     medium: '#faad14',
     low: '#52c41a',
@@ -63,6 +62,9 @@ const TaskGroup: React.FC<TaskGroupProps> = React.memo(({
   // Get all tasks from the store
   const allTasks = useSelector(taskManagementSelectors.selectAll);
   
+  // Get theme from Redux store
+  const isDarkMode = useSelector((state: RootState) => state.themeReducer?.mode === 'dark');
+  
   // Get tasks for this group using memoization for performance
   const groupTasks = useMemo(() => {
     return group.taskIds
@@ -112,8 +114,10 @@ const TaskGroup: React.FC<TaskGroupProps> = React.memo(({
 
   // Memoized style object
   const containerStyle = useMemo(() => ({
-    backgroundColor: isOver ? '#f0f8ff' : undefined,
-  }), [isOver]);
+    backgroundColor: isOver 
+      ? (isDarkMode ? '#1a2332' : '#f0f8ff') 
+      : undefined,
+  }), [isOver, isDarkMode]);
 
   return (
     <div