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/HomePageClient.tsx

@@ -0,0 +1,44 @@
+'use client';
+
+import { KanbanBoardContainer } from '@/components/kanban/BoardContainer';
+import { Header } from '@/components/ui/Header';
+import { TasksProvider, useTasksContext } from '@/contexts/TasksContext';
+import { Task } from '@/lib/types';
+
+interface HomePageClientProps {
+  initialTasks: Task[];
+  initialStats: {
+    total: number;
+    completed: number;
+    inProgress: number;
+    todo: number;
+    completionRate: number;
+  };
+}
+
+function HomePageContent() {
+  const { stats, syncing } = useTasksContext();
+
+  return (
+    <div className="min-h-screen bg-slate-950">
+      <Header 
+        title="TowerControl" 
+        subtitle="Gestionnaire de tâches moderne"
+        stats={stats}
+        syncing={syncing}
+      />
+      
+      <main className="h-[calc(100vh-120px)]">
+        <KanbanBoardContainer />
+      </main>
+    </div>
+  );
+}
+
+export function HomePageClient({ initialTasks, initialStats }: HomePageClientProps) {
+  return (
+    <TasksProvider initialTasks={initialTasks} initialStats={initialStats}>
+      <HomePageContent />
+    </TasksProvider>
+  );
+}