refactor: simplify BoardContainer and update task management

- Removed initialTasks and initialStats props from KanbanBoardContainer, now using TasksContext for task management.
- Updated useTasks hook to include a simulated delay for sync indicator during task updates.
- Replaced KanbanBoardContainer with HomePageClient in the HomePage component for a cleaner structure.

components/kanban/BoardContainer.tsx

@@ -3,26 +3,12 @@
 import { useState } from 'react';
 import { KanbanBoard } from './Board';
 import { EditTaskForm } from '@/components/forms/EditTaskForm';
-import { useTasks } from '@/hooks/useTasks';
+import { useTasksContext } from '@/contexts/TasksContext';
 import { Task, TaskStatus } from '@/lib/types';
 import { UpdateTaskData } from '@/clients/tasks-client';
 
-interface BoardContainerProps {
-  initialTasks: Task[];
-  initialStats: {
-    total: number;
-    completed: number;
-    inProgress: number;
-    todo: number;
-    completionRate: number;
-  };
-}
-
-export function KanbanBoardContainer({ initialTasks, initialStats }: BoardContainerProps) {
-  const { tasks, loading, syncing, createTask, deleteTask, updateTask, updateTaskOptimistic } = useTasks(
-    { limit: 20 }, 
-    { tasks: initialTasks, stats: initialStats }
-  );
+export function KanbanBoardContainer() {
+  const { tasks, loading, createTask, deleteTask, updateTask, updateTaskOptimistic } = useTasksContext();
 
   const [editingTask, setEditingTask] = useState<Task | null>(null);