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.

src/contexts/TasksContext.tsx

@@ -0,0 +1,55 @@
+'use client';
+
+import { createContext, useContext, ReactNode } from 'react';
+import { useTasks } from '@/hooks/useTasks';
+import { Task } from '@/lib/types';
+import { CreateTaskData, UpdateTaskData, TaskFilters } from '@/clients/tasks-client';
+
+interface TasksContextType {
+  tasks: Task[];
+  stats: {
+    total: number;
+    completed: number;
+    inProgress: number;
+    todo: number;
+    completionRate: number;
+  };
+  loading: boolean;
+  syncing: boolean;
+  error: string | null;
+  createTask: (data: CreateTaskData) => Promise<Task | null>;
+  updateTask: (data: UpdateTaskData) => Promise<Task | null>;
+  updateTaskOptimistic: (data: UpdateTaskData) => Promise<Task | null>;
+  deleteTask: (taskId: string) => Promise<void>;
+  refreshTasks: () => Promise<void>;
+  setFilters: (filters: TaskFilters) => void;
+}
+
+const TasksContext = createContext<TasksContextType | null>(null);
+
+interface TasksProviderProps {
+  children: ReactNode;
+  initialTasks: Task[];
+  initialStats: TasksContextType['stats'];
+}
+
+export function TasksProvider({ children, initialTasks, initialStats }: TasksProviderProps) {
+  const tasksState = useTasks(
+    { limit: 20 },
+    { tasks: initialTasks, stats: initialStats }
+  );
+
+  return (
+    <TasksContext.Provider value={tasksState}>
+      {children}
+    </TasksContext.Provider>
+  );
+}
+
+export function useTasksContext() {
+  const context = useContext(TasksContext);
+  if (!context) {
+    throw new Error('useTasksContext must be used within a TasksProvider');
+  }
+  return context;
+}