Revert "mod: color alpha"

This reverts commit a7ffc3b05f.

lib/pages/video/detail/widgets/ai_detail.dart

@@ -55,9 +55,7 @@ class AiDetail extends StatelessWidget {
                     if (modelResult!.outline!.isNotEmpty)
                       Divider(
                         height: 20,
-                        color: Theme.of(context)
-                            .dividerColor
-                            .withValues(alpha: 0.1),
+                        color: Theme.of(context).dividerColor.withOpacity(0.1),
                         thickness: 6,
                       )
                   ],

lib/pages/video/detail/widgets/header_control.dart

@@ -145,7 +145,7 @@ class _HeaderControlState extends State<HeaderControl> {
                         color: Theme.of(context)
                             .colorScheme
                             .onSecondaryContainer
-                            .withValues(alpha: 0.5),
+                            .withOpacity(0.5),
                         borderRadius:
                             const BorderRadius.all(Radius.circular(3))),
                   ),