fix(popup): outside click not closing when initially visible=true (#5790)

* fix(popup): outside click not closing when initially `visible=true`

* chore: stash changelog [ci skip]

---------

Co-authored-by: tdesign-bot <[email protected]>

Author: RSS1102

packages/components/popup/popup.tsx

@@ -225,6 +225,7 @@ export default defineComponent({
         }
         off(document, 'mousedown', onDocumentMouseDown, true);
       },
+      { immediate: true },
     );
 
     watch(

packages/tdesign-vue-next/.changelog/pr-5790.md

@@ -0,0 +1,7 @@
+---
+pr_number: 5790
+contributor: RSS1102
+---
+
+- fix(Popup): 修复当初始 `visible` 为 true 时，点击外部区域时弹窗不关闭的问题 @RSS1102 ([#5790](https://github.com/Tencent/tdesign-vue-next/pull/5790))
+- fix(PopConfirm): 修复当初始 `visible` 为 true 时，点击外部区域时弹窗不关闭的问题 @RSS1102 ([#5790](https://github.com/Tencent/tdesign-vue-next/pull/5790))