refactor(ActionBarIcon): extract onClick logic to setup (#13762)

packages/vant/src/action-bar-icon/ActionBarIcon.tsx

@@ -66,26 +66,22 @@ export default defineComponent({
       );
     };
 
-    return () => {
-      const { disabled } = props;
-
-      const handleClick = () => {
-        if (!disabled) {
+    const onClick = () => {
+      if (!props.disabled) {
         route();
       }
     };
 
-      return (
+    return () => (
       <div
         role="button"
-          class={bem({ disabled })}
-          tabindex={disabled ? -1 : 0}
-          onClick={handleClick}
+        class={bem({ disabled: props.disabled })}
+        tabindex={props.disabled ? -1 : 0}
+        onClick={onClick}
       >
         {renderIcon()}
         {slots.default ? slots.default() : props.text}
       </div>
     );
-    };
   },
 });