fix: 修复个人对话为空时无法重复打开该对话的问题

resources/assets/js/pages/manage/messenger.vue

@@ -200,6 +200,7 @@ export default {
             }
         },
         dialogOpenId(id) {
+            if ( id > 0 )
                 this.dialogId = id;
         },
         contactsKey(val) {

resources/assets/js/store/actions.js

@@ -1765,6 +1765,8 @@ export default {
                 reject({msg: 'Parameter error'});
                 return;
             }
+            // 先重置dialogOpenId，否者无法重复打开相同对话
+            state.dialogOpenId = 0;
             dispatch("call", {
                 url: 'dialog/open/user',
                 data: {