refactor(测试跟踪): 功能用例Text类型的字段改成LONGTEXT

--bug=1024584 --user=陈建星 【测试跟踪】功能用例新建/编辑-文本描述步骤超长保sql异常-提示不明确 https://www.tapd.cn/55049933/s/1352330

test-track/backend/src/main/resources/db/migration/2.8.0/ddl/V11__alter_test_case_text_field_length.sql

@@ -0,0 +1,10 @@
+SET SESSION innodb_lock_wait_timeout = 7200;
+
+-- 文本字段改成 LONGTEXT
+ALTER TABLE test_case MODIFY COLUMN prerequisite LONGTEXT NULL COMMENT 'Test case prerequisite condition';
+ALTER TABLE test_case MODIFY COLUMN remark LONGTEXT NULL COMMENT 'Test case remark';
+ALTER TABLE test_case MODIFY COLUMN steps LONGTEXT NULL COMMENT 'Test case steps (JSON format)';
+ALTER TABLE test_case MODIFY COLUMN step_description LONGTEXT NULL;
+ALTER TABLE test_case MODIFY COLUMN expected_result LONGTEXT NULL;
+
+SET SESSION innodb_lock_wait_timeout = DEFAULT;

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

@@ -55,7 +55,7 @@ export default {
       }
       let userObj = JSON.parse(token);
       let name = userObj.name;
-      return name.substring(0, 2).toUpperCase();
+      return name.substring(0, 1).toUpperCase();
     },
     toEdit() {
       this.state = "EDIT";

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

@@ -44,7 +44,6 @@
 <script>
 import CaseCommentEdit from "./CaseCommentEdit";
 import { getCurrentUser } from "metersphere-frontend/src/utils/token";
-import { deleteMarkDownImgByName } from "@/business/utils/sdk-utils";
 import CaseDiffStatus from "./diff/CaseDiffStatus";
 export default {
   name: "CaseCommentViewItem",
@@ -81,7 +80,7 @@ export default {
     },
     getShortName(name) {
       name = name || "";
-      return name.substring(0, 2).toUpperCase();
+      return name.substring(0, 1).toUpperCase();
     },
     openEdit() {
       if (this.isPublicShow) {