feat: ホーム画面のリマインダー設定ボタンを追加し、UIを改善

Author: yuubinnkyoku

lib/screens/home_screen_new.dart

@@ -1,4 +1,3 @@
-
 import 'package:flutter/material.dart';
 import '../widgets/next_abc_contest_widget.dart';
 import '../widgets/shared/custom_sliver_app_bar.dart';
@@ -12,30 +11,35 @@ class NewHomeScreen extends StatelessWidget {
     return Scaffold(
       body: CustomScrollView(
         slivers: [
-          CustomSliverAppBar(
+          const CustomSliverAppBar(
             isMainView: true,
-            title: const Text('ホーム'),
-            actions: [
-              IconButton(
-                icon: const Icon(Icons.notifications_active_outlined),
-                tooltip: 'リマインダー設定',
-                onPressed: () {
-                  Navigator.push(
-                    context,
-                    MaterialPageRoute(builder: (context) => const ReminderSettingsScreen()),
-                  );
-                },
-              ),
-            ],
+            title: Text('ホーム'),
           ),
           SliverPadding(
             padding: const EdgeInsets.all(16.0),
             sliver: SliverToBoxAdapter(
               child: Column(
-                crossAxisAlignment: CrossAxisAlignment.start,
-                children: const [
-                  NextABCContestWidget(),
-                  SizedBox(height: 16),
+                crossAxisAlignment: CrossAxisAlignment.stretch,
+                children: [
+                  const NextABCContestWidget(),
+                  const SizedBox(height: 24),
+                  ElevatedButton.icon(
+                    icon: const Icon(Icons.notifications_active_outlined),
+                    label: const Text('リマインダー設定'),
+                    style: ElevatedButton.styleFrom(
+                      padding: const EdgeInsets.symmetric(vertical: 12.0),
+                      textStyle: const TextStyle(
+                        fontSize: 16,
+                      ),
+                    ),
+                    onPressed: () {
+                      Navigator.push(
+                        context,
+                        MaterialPageRoute(builder: (context) => const ReminderSettingsScreen()),
+                      );
+                    },
+                  ),
+                  const SizedBox(height: 16),
                   // 他のウィジェットをここに追加可能
                 ],
               ),