fix: 新增联系人后刷新列表

- 问题2: 在onShow生命周期中自动刷新联系人列表

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

src/pages/event-register/event-register.vue

@@ -310,6 +310,8 @@ export default {
     }
   },
   onShow() {
+    // Refresh contact list when returning from add-contact page
+    this.loadContactList()
     if (this.currentStep === 1) {
       if (this.isTeamProject) {
         this.loadTeamList()