fix(sider): custom trigger does not take effect

修复侧边菜单底部的自定义折叠按钮不起作用的问题

src/layouts/default/sider/LayoutSider.vue

@@ -16,6 +16,7 @@
     :theme="getMenuTheme"
     @breakpoint="onBreakpointChange"
     @collapse="toggleCollapsed"
+    :trigger="getTrigger"
     v-bind="getTriggerAttr"
   >
     <template #trigger v-if="getShowTrigger">
@@ -26,7 +27,7 @@
   </Sider>
 </template>
 <script lang="ts">
-  import { computed, defineComponent, ref, unref, CSSProperties } from 'vue';
+  import { computed, defineComponent, ref, unref, CSSProperties, h } from 'vue';
 
   import { Layout } from 'ant-design-vue';
   import LayoutMenu from '../menu/index.vue';
@@ -103,6 +104,10 @@
         };
       });
 
+      // 在此处使用计算量可能会导致sider异常
+      // andv 更新后，如果trigger插槽可用，则此处代码可废弃
+      const getTrigger = h(LayoutTrigger);
+
       return {
         prefixCls,
         sideRef,
@@ -110,6 +115,7 @@
         getIsMobile,
         getHiddenDomStyle,
         getSiderClass,
+        getTrigger,
         getTriggerAttr,
         getCollapsedWidth,
         getMenuFixed,