fix: keepAlive not working for popup appendToMain (#5666)

* 修复弹窗和抽屉 `appendToMain` 时且启用`keepAlive` 时未能正确缓存的问题

packages/@core/ui-kit/popup-ui/src/drawer/drawer.vue

@@ -127,7 +127,9 @@ function handleFocusOutside(e: Event) {
 }
 
 const getAppendTo = computed(() => {
-  return appendToMain.value ? `#${ELEMENT_ID_MAIN_CONTENT}` : undefined;
+  return appendToMain.value
+    ? `#${ELEMENT_ID_MAIN_CONTENT}>div:not(.absolute)>div`
+    : undefined;
 });
 </script>
 <template>

packages/@core/ui-kit/popup-ui/src/modal/modal.vue

@@ -172,7 +172,9 @@ function handleFocusOutside(e: Event) {
   e.stopPropagation();
 }
 const getAppendTo = computed(() => {
-  return appendToMain.value ? `#${ELEMENT_ID_MAIN_CONTENT}` : undefined;
+  return appendToMain.value
+    ? `#${ELEMENT_ID_MAIN_CONTENT}>div:not(.absolute)>div`
+    : undefined;
 });
 </script>
 <template>