fix(测试跟踪): 关联需求名称过长显示问题

--bug=1023717 --user=宋昌昌 【测试跟踪】功能用例-编辑-关联需求名称过长显示问题 https://www.tapd.cn/55049933/s/1341590

test-track/frontend/src/business/case/components/BaseEditItemComponent.vue

@@ -74,7 +74,9 @@
         >
           <div class="story-box">
             <div class="platform">{{ getStoryPlatform() }}</div>
-            <div class="story-label">{{ getStoryLabel() }}</div>
+            <el-tooltip :content="getStoryLabel()" placement="top" effect="dark">
+              <div class="story-label text-ellipsis">{{ getStoryLabel() }}</div>
+            </el-tooltip>
           </div>
         </div>
         <div
@@ -461,6 +463,12 @@ export default {
       line-height: 22px;
       color: #1f2329;
     }
+    .text-ellipsis {
+      text-overflow: ellipsis;
+      overflow-x: hidden;
+      white-space: nowrap;
+      max-width: 190px;
+    }
   }
 }
 .tag-wrap {