fix: dropdown menu responsiveness and improve dialog handling (#8187)

* fix: 修复用户下拉框小部件菜单行点击无响应及弹框闪退

- 主题/时区/全屏/通知菜单行补充 @select 处理器，点击行任意位置即可触发
- 时区设置弹框宿主移出 DropdownMenu（showButton 模式），修复弹框随下拉框关闭而闪退
- 通知组件暴露 toggle 供下拉框调用
- 偏好设置小部件文案精简，positionMap 顺序调整

* feat: draggable-list.vue 直接复用 SelectItem，用法和 tabbar.vue 完全一致

packages/effects/layouts/src/widgets/timezone/timezone-button.vue

@@ -12,6 +12,8 @@ import {
   VbenIconButton,
 } from '@vben-core/shadcn-ui';
 
+withDefaults(defineProps<{ showButton?: boolean }>(), { showButton: true });
+
 const TimezoneIcon = createIconifyIcon('fluent-mdl2:world-clock');
 
 const timezoneStore = useTimezoneStore();
@@ -47,17 +49,20 @@ const [Modal, modalApi] = useVbenModal({
   },
 });
 
-const handleClick = () => {
+function open() {
   modalApi.open();
-};
+}
+
+defineExpose({ open });
 </script>
 
 <template>
   <div>
     <VbenIconButton
+      v-if="showButton"
       :tooltip="$t('ui.widgets.timezone.setTimezone')"
       class="hover:animate-[shrink_0.3s_ease-in-out]"
-      @click="handleClick"
+      @click="open"
     >
       <TimezoneIcon class="size-4 text-foreground" />
     </VbenIconButton>