fix(测试跟踪): 用例关联需求，需求名太长显示优化

--bug=1023519 --user=陈建星 【测试跟踪】关联Azure平台，功能用例关联需求、批量关联需求，平台标签和需求名称显示有遮挡 https://www.tapd.cn/55049933/s/1340066

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

@@ -440,7 +440,7 @@ export default {
       align-items: center;
       padding: 1px 6px;
       gap: 4px;
-      width: 45px;
+      min-width: 45px;
       height: 24px;
       line-height: 24px;
       text-align: center;

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

@@ -248,7 +248,7 @@ export default {
   color: #783887;
   padding: 1px 6px;
   gap: 4px;
-  width: 49px;
+  min-width: 49px;
   height: 24px;
   background: rgba(120, 56, 135, 0.2);
   border-radius: 2px;

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

@@ -708,7 +708,7 @@ export default {
     color: #783887;
     padding: 1px 6px;
     gap: 4px;
-    width: 49px;
+    min-width: 49px;
     height: 24px;
     background: rgba(120, 56, 135, 0.2);
     border-radius: 2px;