fix: defensive keys and overflow guard in result overlay

- Add ValueKey(i) to each TweenAnimationBuilder in the star animation loop
  to prevent Flutter from reusing widget state during rebuild cycles
- Add maxLines: 2 and overflow: TextOverflow.ellipsis to the almostThere
  Text widget to prevent overflow in the loss-state progress message

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/ui/screens/game_screen.dart

@@ -345,6 +345,7 @@ class _GameScreenState extends ConsumerState<GameScreen>
                       children: [
                         for (var i = 0; i < 3; i++)
                           TweenAnimationBuilder<double>(
+                            key: ValueKey(i),
                             tween: Tween(begin: 0, end: 1),
                             duration: Duration(milliseconds: 400 + i * 250),
                             curve: Interval(i * 0.22, 1, curve: Curves.elasticOut),
@@ -377,6 +378,8 @@ class _GameScreenState extends ConsumerState<GameScreen>
                             child: Text(
                               l10n.almostThere((view.objectiveProgress * 100).round()),
                               textAlign: TextAlign.center,
+                              maxLines: 2,
+                              overflow: TextOverflow.ellipsis,
                               style: theme.textTheme.labelSmall,
                             ),
                           ),