fix(测试跟踪): 脑图保存报错后一直loading

--bug=1022355 --user=陈建星 【测试跟踪】github#21531，V2.6 功能测试-脑图创建名称同样的模块，页面会卡 https://www.tapd.cn/55049933/s/1340346

test-track/backend/src/main/java/io/metersphere/service/TestCaseNodeService.java

@@ -96,6 +96,7 @@ public class TestCaseNodeService extends NodeTreeService<TestCaseNodeDTO> {
             throw new RuntimeException(Translator.get("test_case_node_level_tip")
                     + TestCaseConstants.MAX_NODE_DEPTH + Translator.get("test_case_node_level"));
         }
+        this.checkTestCaseNodeExist(node);
     }
 
     private void checkTestCaseNodeExist(TestCaseNode node) {

test-track/frontend/src/business/common/minder/TestCaseMinder.vue

@@ -339,6 +339,9 @@ export default {
           if (callback && callback instanceof Function) {
             callback();
           }
+        })
+        .catch(() => {
+          this.result.loading = false;
          });
     },
     buildSaveParam(root, parent, preNode, nextNode) {

test-track/frontend/src/business/review/view/components/TestReviewTestCaseEditOperationBar.vue

@@ -34,7 +34,7 @@
     <div class="bar-item click-item"
          @click="handleNext">
       <span>
-        {{ $t("case.previous_public_case") }}
+       {{ $t('case.next_public_case') }}
       </span>
       <i class="el-icon-arrow-right"/>
     </div>
@@ -43,7 +43,7 @@
          @click="handlePre">
       <i class="el-icon-arrow-left"/>
       <span>
-        {{ $t('case.next_public_case') }}
+        {{ $t("case.previous_public_case") }}
       </span>
     </div>