feat: redesigned home with adventure/classic entries and endless best

Add adventure/classic l10n keys; rewrite HomeScreen with SeasonBackground,
2×2 glossy logo mark, Adventure→SeasonMap + Classic→endless GameScreen buttons,
and conditional best-score caption. Update widget_test assertions accordingly.

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

lib/l10n/app_en.arb

@@ -52,5 +52,7 @@
       }
     }
   },
-  "newBest": "NEW BEST!"
+  "newBest": "NEW BEST!",
+  "adventure": "Adventure",
+  "classic": "Classic"
 }

lib/l10n/app_ko.arb

@@ -24,5 +24,7 @@
   "tutorialHud": "이동 횟수가 끝나기 전에 목표를 달성하세요. 이제 직접!",
   "gameOver": "게임 오버",
   "bestScore": "최고 {score}",
-  "newBest": "신기록!"
+  "newBest": "신기록!",
+  "adventure": "어드벤처",
+  "classic": "클래식"
 }

lib/ui/screens/home_screen.dart

@@ -1,31 +1,52 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
+import '../../game/models/season.dart';
+import '../../game/models/stage.dart';
 import '../../l10n/gen/app_localizations.dart';
 import '../../state/providers.dart';
+import '../widgets/season_background.dart';
+import 'game_screen.dart';
 import 'season_map_screen.dart';
 
 class HomeScreen extends ConsumerWidget {
   const HomeScreen({super.key});
 
+  static const _logoColors = [
+    Color(0xFFFF7EB3),
+    Color(0xFFFFD166),
+    Color(0xFF6FCDF5),
+    Color(0xFF7EDB9C),
+  ];
+
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final l10n = AppLocalizations.of(context)!;
     final streak = ref.watch(streakProvider);
+    final best = ref.watch(endlessBestProvider);
+
     return Scaffold(
-      body: SafeArea(
+      backgroundColor: Colors.transparent,
+      body: Stack(
+        fit: StackFit.expand,
+        children: [
+          const SeasonBackground(theme: SeasonTheme.fallback),
+          SafeArea(
             child: Center(
               child: Column(
                 mainAxisAlignment: MainAxisAlignment.center,
                 children: [
+                  _logoMark(),
+                  const SizedBox(height: 18),
                   Text(
                     l10n.appTitle,
-                style: Theme.of(context).textTheme.displaySmall?.copyWith(
-                      fontWeight: FontWeight.bold,
-                    ),
+                    style: Theme.of(context)
+                        .textTheme
+                        .displaySmall
+                        ?.copyWith(fontWeight: FontWeight.w900),
                   ),
                   if (streak.current > 0) ...[
-                const SizedBox(height: 12),
+                    const SizedBox(height: 10),
                     Chip(
                       avatar: const Icon(
                         Icons.local_fire_department,
@@ -38,28 +59,90 @@ class HomeScreen extends ConsumerWidget {
                       ),
                     ),
                   ],
-              const SizedBox(height: 48),
+                  const SizedBox(height: 44),
                   FilledButton(
                     style: FilledButton.styleFrom(
                       padding: const EdgeInsets.symmetric(
-                    horizontal: 48,
-                    vertical: 16,
-                  ),
+                          horizontal: 56, vertical: 18),
                       textStyle: Theme.of(context).textTheme.titleLarge,
                     ),
-                onPressed: () {
-                  Navigator.of(context).push(
+                    onPressed: () => Navigator.of(context).push(
                       MaterialPageRoute(
-                      builder: (_) => const SeasonMapScreen(),
+                          builder: (_) => const SeasonMapScreen()),
+                    ),
+                    child: Text(l10n.adventure),
+                  ),
+                  const SizedBox(height: 14),
+                  OutlinedButton(
+                    style: OutlinedButton.styleFrom(
+                      padding: const EdgeInsets.symmetric(
+                          horizontal: 40, vertical: 14),
+                      textStyle: Theme.of(context).textTheme.titleMedium,
+                    ),
+                    onPressed: () {
+                      ref.read(gameSessionProvider.notifier).startStage(
+                            StageConfig.endless(
+                              seed: DateTime.now().millisecondsSinceEpoch,
                             ),
                           );
+                      Navigator.of(context).push(
+                        MaterialPageRoute(
+                            builder: (_) => const GameScreen()),
+                      );
                     },
-                child: Text(l10n.play),
+                    child: Text(l10n.classic),
                   ),
+                  if (best > 0) ...[
+                    const SizedBox(height: 10),
+                    Text(
+                      l10n.bestScore(best),
+                      style: TextStyle(
+                        color: Colors.white.withValues(alpha: 0.55),
+                      ),
+                    ),
+                  ],
                 ],
               ),
             ),
           ),
+        ],
+      ),
+    );
+  }
+
+  Widget _logoMark() {
+    return SizedBox(
+      width: 96,
+      height: 96,
+      child: GridView.count(
+        crossAxisCount: 2,
+        mainAxisSpacing: 5,
+        crossAxisSpacing: 5,
+        physics: const NeverScrollableScrollPhysics(),
+        children: [
+          for (final color in _logoColors)
+            DecoratedBox(
+              decoration: BoxDecoration(
+                borderRadius: BorderRadius.circular(11),
+                gradient: LinearGradient(
+                  begin: Alignment.topLeft,
+                  end: Alignment.bottomRight,
+                  colors: [
+                    Color.lerp(color, Colors.white, 0.28)!,
+                    color,
+                    Color.lerp(color, Colors.black, 0.22)!,
+                  ],
+                ),
+                boxShadow: [
+                  BoxShadow(
+                    color: color.withValues(alpha: 0.45),
+                    blurRadius: 14,
+                  ),
+                ],
+              ),
+            ),
+        ],
+      ),
     );
   }
 }

test/widget_test.dart

@@ -23,6 +23,7 @@ void main() {
     await tester.pumpAndSettle();
 
     expect(find.text('Block Seasons'), findsOneWidget);
-    expect(find.text('Play'), findsOneWidget);
+    expect(find.text('Adventure'), findsOneWidget);
+    expect(find.text('Classic'), findsOneWidget);
   });
 }