feat: remove TaskStats from HomePageClient and Header components

- Eliminated `initialStats` prop from `HomePageClient` and `KanbanPageClient` to streamline data handling.
- Updated `Header` and `HeaderContainer` components to remove references to `stats`, enhancing clarity and reducing unnecessary complexity.
- Adjusted `useTasks` hook to make `stats` optional, ensuring compatibility with the updated components.

components/HomePageClient.tsx

@@ -3,7 +3,7 @@
 import { Header } from '@/components/ui/Header';
 import { TasksProvider, useTasksContext } from '@/contexts/TasksContext';
 import { UserPreferencesProvider } from '@/contexts/UserPreferencesContext';
-import { Task, Tag, TaskStats, UserPreferences } from '@/lib/types';
+import { Task, Tag, UserPreferences } from '@/lib/types';
 import { CreateTaskData } from '@/clients/tasks-client';
 import { DashboardStats } from '@/components/dashboard/DashboardStats';
 import { QuickActions } from '@/components/dashboard/QuickActions';
@@ -12,7 +12,6 @@ import { ProductivityAnalytics } from '@/components/dashboard/ProductivityAnalyt
 
 interface HomePageClientProps {
   initialTasks: Task[];
-  initialStats: TaskStats;
   initialTags: (Tag & { usage: number })[];
   initialPreferences: UserPreferences;
 }
@@ -29,9 +28,8 @@ function HomePageContent() {
   return (
     <div className="min-h-screen bg-[var(--background)]">
       <Header 
-        title="TowerControl" 
+        title="TowerControl"
         subtitle="Dashboard - Vue d'ensemble"
-        stats={stats}
         syncing={syncing}
       />
       
@@ -52,12 +50,11 @@ function HomePageContent() {
   );
 }
 
-export function HomePageClient({ initialTasks, initialStats, initialTags, initialPreferences }: HomePageClientProps) {
+export function HomePageClient({ initialTasks, initialTags, initialPreferences }: HomePageClientProps) {
   return (
     <UserPreferencesProvider initialPreferences={initialPreferences}>
       <TasksProvider 
-        initialTasks={initialTasks} 
-        initialStats={initialStats}
+        initialTasks={initialTasks}
         initialTags={initialTags}
       >
         <HomePageContent />