wrap returns from if blocks

fixes two analyzer errors for return blocks on new lines from if blocks

lib/screens/chat_screen.dart

@@ -673,8 +673,9 @@ class _ChatScreenState extends State<ChatScreen> {
   String _formatRelativeTime(DateTime time) {
     final diff = DateTime.now().difference(time);
     if (diff.inSeconds < 60) return context.l10n.time_justNow;
-    if (diff.inMinutes < 60)
+    if (diff.inMinutes < 60) {
       return context.l10n.time_minutesAgo(diff.inMinutes);
+    }
     if (diff.inHours < 24) return context.l10n.time_hoursAgo(diff.inHours);
     return context.l10n.time_daysAgo(diff.inDays);
   }

lib/screens/repeater_status_screen.dart

@@ -646,8 +646,9 @@ class _RepeaterStatusScreenState extends State<RepeaterStatusScreen> {
       final direct = _formatValue(_dupDirect);
       return l10n.repeater_duplicatesFloodDirect(flood, direct);
     }
-    if (_packetsRecv == null || _floodRx == null || _directRx == null)
+    if (_packetsRecv == null || _floodRx == null || _directRx == null) {
       return '—';
+    }
     final dupTotal = _packetsRecv! - _floodRx! - _directRx!;
     if (dupTotal < 0) return '—';
     return l10n.repeater_duplicatesTotal(dupTotal);