feat(mornye): add persistent accent color choices

test/appearance_settings_test.dart

@@ -0,0 +1,97 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'package:spotiflac_android/l10n/l10n.dart';
+import 'package:spotiflac_android/models/theme_settings.dart';
+import 'package:spotiflac_android/providers/theme_provider.dart';
+import 'package:spotiflac_android/screens/settings/appearance_settings_page.dart';
+import 'package:spotiflac_android/theme/dynamic_color_wrapper.dart';
+import 'package:spotiflac_android/theme/mornye_theme.dart';
+
+void main() {
+  Future<void> openSettings(
+    WidgetTester tester,
+    SharedPreferences prefs,
+  ) async {
+    tester.view.physicalSize = const Size(390, 1000);
+    tester.view.devicePixelRatio = 1;
+    addTearDown(tester.view.reset);
+    await tester.pumpWidget(
+      ProviderScope(
+        overrides: [
+          initialThemeSettingsProvider.overrideWithValue(
+            loadBootstrapThemeSettings(prefs),
+          ),
+        ],
+        child: DynamicColorWrapper(
+          builder: (light, dark, mode) => MaterialApp(
+            theme: light,
+            darkTheme: dark,
+            themeMode: mode,
+            localizationsDelegates: AppLocalizations.localizationsDelegates,
+            supportedLocales: AppLocalizations.supportedLocales,
+            home: const MornyeSettingsTheme(child: AppearanceSettingsPage()),
+          ),
+        ),
+      ),
+    );
+    await tester.pumpAndSettle();
+  }
+
+  for (final mode in [ThemeMode.light, ThemeMode.dark]) {
+    testWidgets('Mornye accent updates live and survives restart ($mode)', (
+      tester,
+    ) async {
+      SharedPreferences.setMockInitialValues({
+        kThemeStyleKey: 'mornye',
+        kThemeModeKey: mode.name,
+        kSeedColorKey: 0xff123456,
+      });
+      final prefs = await SharedPreferences.getInstance();
+      await openSettings(tester, prefs);
+      final page = find.byType(AppearanceSettingsPage);
+      final initial = Theme.of(tester.element(page));
+      expect(
+        initial.colorScheme.primary,
+        MornyeTheme.accentColor(MornyeAccent.red, initial.brightness),
+      );
+
+      final blue = find.byTooltip('Blue');
+      await tester.ensureVisible(blue);
+      await tester.tap(blue);
+      await tester.pumpAndSettle();
+      final theme = Theme.of(tester.element(page));
+      expect(
+        theme.colorScheme.primary,
+        MornyeTheme.accentColor(MornyeAccent.blue, theme.brightness),
+      );
+      expect(prefs.getString(kMornyeAccentKey), 'blue');
+      expect(prefs.getInt(kSeedColorKey), 0xff123456);
+      final overlay = MornyeTheme.fromContext(
+        tester.element(page),
+        brightness: Brightness.dark,
+      );
+      expect(overlay.extension<MornyeTheme>()!.accent, MornyeAccent.blue);
+      expect(
+        overlay.colorScheme.primary,
+        MornyeTheme.accentColor(MornyeAccent.blue, Brightness.dark),
+      );
+
+      await tester.pumpWidget(const SizedBox());
+      await openSettings(tester, prefs);
+      expect(
+        Theme.of(tester.element(page)).colorScheme.primary,
+        theme.colorScheme.primary,
+      );
+      await tester.ensureVisible(find.byTooltip('Red (default)'));
+      await tester.tap(find.byTooltip('Red (default)'));
+      await tester.pumpAndSettle();
+      expect(
+        Theme.of(tester.element(page)).colorScheme.primary,
+        initial.colorScheme.primary,
+      );
+      expect(tester.takeException(), isNull);
+    });
+  }
+}

test/models_and_utils_test.dart

@@ -1108,6 +1108,7 @@ void main() {
         seedColorValue: 0xff123456,
         useAmoled: true,
         style: AppThemeStyle.mornye,
+        mornyeAccent: MornyeAccent.blue,
       );
 
       final decoded = ThemeSettings.fromJson(settings.toJson());
@@ -1119,6 +1120,13 @@ void main() {
       expect(copied.themeMode, ThemeMode.light);
       expect(copied.useAmoled, isTrue);
       expect(decoded.style, AppThemeStyle.mornye);
+      expect(decoded.mornyeAccent, MornyeAccent.blue);
+      expect(copied.mornyeAccent, MornyeAccent.blue);
+      expect(ThemeSettings.fromJson({}).mornyeAccent, MornyeAccent.red);
+      expect(
+        ThemeSettings.fromJson({kMornyeAccentKey: 'unknown'}).mornyeAccent,
+        MornyeAccent.red,
+      );
       expect(
         ThemeSettings.fromJson({'theme_mode': 'invalid'}).themeMode,
         ThemeMode.system,