chore(mobile): add kebabu menu in asset viewer (#24387)

* feat(mobile): implement viewer kebab menu with about option

* feat: revert exisitng buttons, adjust label name

* unify MenuAnchor usage

---------

Co-authored-by: Alex <alex.tran1502@gmail.com>

mobile/lib/presentation/widgets/action_buttons/base_action_button.widget.dart

@@ -11,6 +11,7 @@ class BaseActionButton extends StatelessWidget {
     this.onLongPressed,
     this.maxWidth = 90.0,
     this.minWidth,
+    this.iconOnly = false,
     this.menuItem = false,
   });
 
@@ -19,6 +20,11 @@ class BaseActionButton extends StatelessWidget {
   final Color? iconColor;
   final double maxWidth;
   final double? minWidth;
+
+  /// When true, renders only an IconButton without text label
+  final bool iconOnly;
+
+  /// When true, renders as a MenuItemButton for use in MenuAnchor menus
   final bool menuItem;
   final void Function()? onPressed;
   final void Function()? onLongPressed;
@@ -31,13 +37,26 @@ class BaseActionButton extends StatelessWidget {
     final iconColor = this.iconColor ?? iconTheme.color ?? context.themeData.iconTheme.color;
     final textColor = context.themeData.textTheme.labelLarge?.color;
 
-    if (menuItem) {
+    if (iconOnly) {
       return IconButton(
         onPressed: onPressed,
         icon: Icon(iconData, size: iconSize, color: iconColor),
       );
     }
 
+    if (menuItem) {
+      final theme = context.themeData;
+      final effectiveStyle = theme.textTheme.labelLarge;
+      final effectiveIconColor = iconColor ?? theme.iconTheme.color ?? theme.colorScheme.onSurfaceVariant;
+
+      return MenuItemButton(
+        style: MenuItemButton.styleFrom(padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12)),
+        leadingIcon: Icon(iconData, color: effectiveIconColor, size: 20),
+        onPressed: onPressed,
+        child: Text(label, style: effectiveStyle),
+      );
+    }
+
     return ConstrainedBox(
       constraints: BoxConstraints(maxWidth: maxWidth),
       child: MaterialButton(