chore: prefer using extend (#8531)

src/utils/mount-component.ts

@@ -1,4 +1,5 @@
 import { createApp, reactive, Component, nextTick } from 'vue';
+import { extend } from '../utils';
 import { useExpose } from '../composables/use-expose';
 
 export function usePopupState() {
@@ -11,7 +12,7 @@ export function usePopupState() {
   };
 
   const open = (props: Record<string, any>) => {
-    Object.assign(state, props);
+    extend(state, props);
     nextTick(() => toggle(true));
   };