fix(名字): 比赛成绩、全班情况、看板、题单、统计里的名字不再用真名，一律和排行榜一样显示 ks241XXX；导出成绩去掉姓名列

两个写法不同的 UserName 合成 shared/components/UserName.vue 一个。

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/web/src/oj/submission/components/FlowchartPane.vue

@@ -9,7 +9,7 @@ import { FlowchartSubmissionStatus } from "utils/types"
 import { useTone } from "../composables/tone"
 import { submissionTimeText } from "../utils"
 import FlowchartState from "./FlowchartState.vue"
-import UserName from "./UserName.vue"
+import UserName from "shared/components/UserName.vue"
 
 /**
  * 流程图模式的右栏：左边画出来的图，右边四项评分和建议。原来要点编号再开一个

apps/web/src/oj/submission/components/SubmissionPane.vue

@@ -20,7 +20,7 @@ import { useTone } from "../composables/tone"
 import { classLabel, submissionTimeText } from "../utils"
 import CodeView from "./CodeView.vue"
 import StatusPill from "./StatusPill.vue"
-import UserName from "./UserName.vue"
+import UserName from "shared/components/UserName.vue"
 
 /**
  * 提交列表的右栏：选中那一条的代码和结果（设计稿「提交列表重设计 · 定稿」）。