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/app/globals.css

@@ -544,3 +544,11 @@ body {
 .animate-glow {
   animation: glow 2s ease-in-out infinite;
 }
+
+/* Line clamp utilities */
+.line-clamp-2 {
+  display: -webkit-box;
+  -webkit-line-clamp: 2;
+  -webkit-box-orient: vertical;
+  overflow: hidden;
+}