feat: Implement contact form clearing, refactor chat avatar display to use S3Image, add unread count to notification filter, and enhance agent detail layout.

lib/features/notifications/presentation/screens/notifications_screen.dart

@@ -83,7 +83,13 @@ class _NotificationsScreenState extends ConsumerState<NotificationsScreen> {
             children: [
               _buildFilterChip('All', 'all'),
               const SizedBox(width: 8),
-              _buildFilterChip('Unread', 'unread'),
+              Builder(builder: (context) {
+                final unreadCount = ref.watch(unreadCountProvider);
+                final label = unreadCount > 0
+                    ? 'Unread ($unreadCount)'
+                    : 'Unread';
+                return _buildFilterChip(label, 'unread');
+              }),
               const Spacer(),
               GestureDetector(
                 onTap: () {