opt switch style

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/utils/page_utils.dart

@@ -227,17 +227,6 @@ abstract class PageUtils {
                               alignment: Alignment.centerRight,
                               scale: 0.8,
                               child: Switch(
-                                thumbIcon:
-                                    WidgetStateProperty.resolveWith<Icon?>((
-                                      Set<WidgetState> states,
-                                    ) {
-                                      if (states.isNotEmpty &&
-                                          states.first ==
-                                              WidgetState.selected) {
-                                        return const Icon(Icons.done);
-                                      }
-                                      return null;
-                                    }),
                                 value: shutdownTimerService
                                     .waitForPlayingCompleted,
                                 onChanged: (value) {

lib/utils/theme_utils.dart

@@ -115,6 +115,14 @@ abstract class ThemeUtils {
       cupertinoOverrideTheme: CupertinoThemeData(
         selectionHandleColor: colorScheme.primary,
       ),
+      switchTheme: const SwitchThemeData(
+        thumbIcon: WidgetStateProperty<Icon?>.fromMap(
+          <WidgetStatesConstraint, Icon?>{
+            WidgetState.selected: Icon(Icons.done),
+            WidgetState.any: null,
+          },
+        ),
+      ),
     );
     if (isDark) {
       if (Pref.isPureBlackTheme) {