feat: integrate UserPreferencesContext for improved preference management

- Added `UserPreferencesProvider` to `RootLayout` for centralized user preferences handling.
- Updated components to remove direct user preferences fetching, relying on context instead.
- Enhanced SSR data fetching by consolidating user preferences retrieval into a single service call.
- Cleaned up unused props in various components to streamline the codebase.

src/app/page.tsx

@@ -1,6 +1,5 @@
 import { tasksService } from '@/services/tasks';
 import { tagsService } from '@/services/tags';
-import { userPreferencesService } from '@/services/user-preferences';
 import { HomePageClient } from '@/components/HomePageClient';
 
 // Force dynamic rendering (no static generation)
@@ -8,10 +7,9 @@ export const dynamic = 'force-dynamic';
 
 export default async function HomePage() {
   // SSR - Récupération des données côté serveur
-  const [initialTasks, initialTags, initialPreferences, initialStats] = await Promise.all([
+  const [initialTasks, initialTags, initialStats] = await Promise.all([
     tasksService.getTasks(),
     tagsService.getTags(),
-    userPreferencesService.getAllPreferences(),
     tasksService.getTaskStats()
   ]);
 
@@ -19,7 +17,6 @@ export default async function HomePage() {
     <HomePageClient 
       initialTasks={initialTasks}
       initialTags={initialTags}
-      initialPreferences={initialPreferences}
       initialStats={initialStats}
     />
   );