feat: add unlink confirmation dialog, enable agent navigation, update notification read status UI, and increment app version

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

@@ -93,26 +93,32 @@ class _NotificationsScreenState extends ConsumerState<NotificationsScreen> {
                 return _buildFilterChip(label, 'unread');
               }),
               const Spacer(),
-              GestureDetector(
-                onTap: () async {
-                  await ref
-                      .read(notificationListProvider.notifier)
-                      .markAllAsRead();
-                  // Reload current filter to reflect changes
-                  ref
-                      .read(notificationListProvider.notifier)
-                      .loadNotifications(filter: _activeFilter);
-                },
-                child: const Text(
-                  'Mark all as read',
-                  style: TextStyle(
-                    fontFamily: 'SourceSerif4',
-                    fontSize: 13,
-                    fontWeight: FontWeight.w400,
-                    color: AppColors.accentOrange,
+              Builder(builder: (context) {
+                final hasUnread = ref.watch(unreadCountProvider) > 0;
+                return GestureDetector(
+                  onTap: hasUnread
+                      ? () async {
+                          await ref
+                              .read(notificationListProvider.notifier)
+                              .markAllAsRead();
+                          ref
+                              .read(notificationListProvider.notifier)
+                              .loadNotifications(filter: _activeFilter);
+                        }
+                      : null,
+                  child: Text(
+                    'Mark all as read',
+                    style: TextStyle(
+                      fontFamily: 'SourceSerif4',
+                      fontSize: 13,
+                      fontWeight: FontWeight.w400,
+                      color: hasUnread
+                          ? AppColors.accentOrange
+                          : AppColors.accentOrange.withValues(alpha: 0.4),
+                    ),
                   ),
-                ),
-              ),
+                );
+              }),
             ],
           ),
         ),