feat: add line clamp utility and integrate RecentTaskTimeline component

- Added a new CSS utility for line clamping to `globals.css` for better text overflow handling.
- Integrated `WelcomeSection` into `HomePageClient` for enhanced user experience.
- Replaced `TaskCard` with `RecentTaskTimeline` in `RecentTasks` for improved task visualization.
- Updated `ui/index.ts` to export `RecentTaskTimeline` and showcased it in `CardsSection` and `FeedbackSection`.

src/components/HomePageClient.tsx

@@ -8,6 +8,7 @@ import { DashboardStats } from '@/components/dashboard/DashboardStats';
 import { QuickActions } from '@/components/dashboard/QuickActions';
 import { RecentTasks } from '@/components/dashboard/RecentTasks';
 import { ProductivityAnalytics } from '@/components/dashboard/ProductivityAnalytics';
+import { WelcomeSection } from '@/components/dashboard/WelcomeSection';
 import { ProductivityMetrics } from '@/services/analytics/analytics';
 import { DeadlineMetrics } from '@/services/analytics/deadline-analytics';
 import { useGlobalKeyboardShortcuts } from '@/hooks/useGlobalKeyboardShortcuts';
@@ -55,6 +56,9 @@ function HomePageContent({ productivityMetrics, deadlineMetrics }: {
       />
       
       <main className="container mx-auto px-6 py-8">
+        {/* Section de bienvenue */}
+        <WelcomeSection />
+        
         {/* Statistiques */}
         <DashboardStats stats={stats} />