Add "settings" page with dart/light theme selector

lib/ui/widgets/settings/settings_form.dart

+import 'package:easy_localization/easy_localization.dart';
+import 'package:flutter/material.dart';
+import 'package:unicons/unicons.dart';
+
+import 'package:sudoku/ui/widgets/settings/theme_card.dart';
+
+class SettingsForm extends StatefulWidget {
+  const SettingsForm({super.key});
+
+  @override
+  State<SettingsForm> createState() => _SettingsFormState();
+}
+
+class _SettingsFormState extends State<SettingsForm> {
+  @override
+  void dispose() {
+    super.dispose();
+  }
+
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      mainAxisAlignment: MainAxisAlignment.start,
+      crossAxisAlignment: CrossAxisAlignment.start,
+      mainAxisSize: MainAxisSize.max,
+      children: <Widget>[
+        // Light/dark theme
+        Row(
+          mainAxisAlignment: MainAxisAlignment.spaceBetween,
+          crossAxisAlignment: CrossAxisAlignment.center,
+          children: <Widget>[
+            const Text('settings_label_theme').tr(),
+            const Row(
+              mainAxisAlignment: MainAxisAlignment.end,
+              crossAxisAlignment: CrossAxisAlignment.center,
+              children: [
+                ThemeCard(
+                  mode: ThemeMode.system,
+                  icon: UniconsLine.cog,
+                ),
+                ThemeCard(
+                  mode: ThemeMode.light,
+                  icon: UniconsLine.sun,
+                ),
+                ThemeCard(
+                  mode: ThemeMode.dark,
+                  icon: UniconsLine.moon,
+                )
+              ],
+            ),
+          ],
+        ),
+
+        const SizedBox(height: 16),
+      ],
+    );
+  }
+}

lib/ui/widgets/settings/theme_card.dart

+import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+
+import 'package:sudoku/cubit/theme_cubit.dart';
+
+class ThemeCard extends StatelessWidget {
+  const ThemeCard({
+    super.key,
+    required this.mode,
+    required this.icon,
+  });
+
+  final IconData icon;
+  final ThemeMode mode;
+
+  @override
+  Widget build(BuildContext context) {
+    return BlocBuilder<ThemeCubit, ThemeModeState>(
+      builder: (BuildContext context, ThemeModeState state) {
+        return Card(
+          elevation: 2,
+          shadowColor: Theme.of(context).colorScheme.shadow,
+          color: state.themeMode == mode
+              ? Theme.of(context).colorScheme.primary
+              : Theme.of(context).colorScheme.surface,
+          shape: const RoundedRectangleBorder(
+            borderRadius: BorderRadius.all(Radius.circular(12)),
+          ),
+          margin: const EdgeInsets.all(5),
+          child: InkWell(
+            onTap: () => BlocProvider.of<ThemeCubit>(context).getTheme(
+              ThemeModeState(themeMode: mode),
+            ),
+            borderRadius: const BorderRadius.all(Radius.circular(12)),
+            child: Icon(
+              icon,
+              size: 32,
+              color: state.themeMode != mode
+                  ? Theme.of(context).colorScheme.primary
+                  : Colors.white,
+            ),
+          ),
+        );
+      },
+    );
+  }
+}

pubspec.lock

@@ -9,14 +9,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.5.0"
-  async:
-    dependency: transitive
-    description:
-      name: async
-      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.11.0"
   badges:
     dependency: "direct main"
     description:
@@ -192,14 +184,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.0"
-  overlay_support:
-    dependency: "direct main"
-    description:
-      name: overlay_support
-      sha256: fc39389bfd94e6985e1e13b2a88a125fc4027608485d2d4e2847afe1b2bb339c
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.1.0"
   path:
     dependency: transitive
     description:
@@ -357,6 +341,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.2"
+  unicons:
+    dependency: "direct main"
+    description:
+      name: unicons
+      sha256: dbfcf93ff4d4ea19b324113857e358e4882115ab85db04417a4ba1c72b17a670
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
   vector_math:
     dependency: transitive
     description:

pubspec.yaml

 name: sudoku
 description: A sudoku game application.
 
-publish_to: 'none'
+publish_to: "none"
 
-version: 0.1.20+69
+version: 0.1.21+70
 
 environment:
-  sdk: '^3.0.0'
+  sdk: "^3.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
+
   badges: ^3.1.2
   easy_localization: ^3.0.1
   equatable: ^2.0.5
   flutter_bloc: ^8.1.1
   hive: ^2.2.3
   hydrated_bloc: ^9.0.0
-  overlay_support: ^2.1.0
   path_provider: ^2.0.11
+  unicons: ^2.1.1
 
 dev_dependencies:
   flutter_lints: ^3.0.1