fix(测试计划): 抽屉提示文字修改

--bug=1042697 --user=王旭 【测试计划】计划详情-关联接口用例抽屉-搜索接口用例-只支持ID或名称，不应该支持路径搜索 https://www.tapd.cn/55049933/s/1533491

frontend/src/components/business/ms-associate-case/index.vue

@@ -136,7 +136,7 @@
           :filter-config-list="[]"
           :custom-fields-config-list="[]"
           :row-count="0"
-          :search-placeholder="t('common.searchByIdName')"
+          :search-placeholder="searchPlaceholder"
           @keyword-search="loadCaseList"
           @adv-search="loadCaseList"
           @refresh="loadCaseList"
@@ -369,6 +369,19 @@
     }
   });
 
+  const searchPlaceholder = computed(() => {
+    switch (associationType.value) {
+      case CaseLinkEnum.FUNCTIONAL:
+        return t('common.searchByIdName');
+      case CaseLinkEnum.API:
+        return t('apiTestManagement.searchPlaceholder');
+      case CaseLinkEnum.SCENARIO:
+        return t('common.searchByIdName');
+      default:
+        return '';
+    }
+  });
+
   /**
    * 处理模块树节点选中事件
    */