fix(项目设置): 测试计划关联测试用例不勾选提示问题

--bug=1018453 --user=宋昌昌 【测试跟踪】测试计划-关联用例-不勾选用例保存-未提示 https://www.tapd.cn/55049933/s/1269940

test-track/frontend/src/business/plan/view/comonents/api/TestCaseApiRelevance.vue

@@ -214,6 +214,10 @@ export default {
           return;
         }
       }
+      if (selectIds.length < 1) {
+        this.$warning(this.$t('test_track.plan_view.please_choose_test_case'));
+        return;
+      }
       param.planId = this.planId;
       param.selectIds = selectIds;
       param.environmentId = environmentId;

test-track/frontend/src/business/plan/view/comonents/api/TestCaseScenarioRelevance.vue

@@ -137,6 +137,10 @@ export default {
       let map = this.$refs.apiScenarioList.map;
       let envGroupId = this.$refs.apiScenarioList.envGroupId;
 
+      if (selectRows.size < 1) {
+        this.$warning(this.$t('test_track.plan_view.please_choose_test_case'));
+        return;
+      }
       selectRows.forEach(row => {
         selectIds.push(row.id);
       })

test-track/frontend/src/business/plan/view/comonents/load/TestCaseLoadRelevance.vue

@@ -194,6 +194,10 @@ export default {
     },
     saveCaseRelevance() {
       let selectRows = this.$refs.table.selectRows;
+      if (selectRows.size < 1) {
+        this.$warning(this.$t('test_track.plan_view.please_choose_test_case'));
+        return;
+      }
       let param = buildBatchParam(this, undefined, this.projectId);
       param.ids = Array.from(selectRows).map(row => row.id);
       if (this.planId) {

test-track/frontend/src/business/plan/view/comonents/ui/TestCaseUiScenarioRelevance.vue

@@ -151,6 +151,10 @@ export default {
       selectRows.forEach(row => {
         selectIds.push(row.id);
       })
+      if (selectIds.length < 1) {
+        this.$warning(this.$t('test_track.plan_view.please_choose_test_case'));
+        return;
+      }
 
       let param = {};
       param.planId = this.planId;