style(比赛): 有密码的比赛前面那个彩色盾牌锁换成和全站一样的细线灰锁，放到比赛名后面

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

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

@@ -1,48 +0,0 @@
-<script setup lang="ts">
-import { useThemeVars } from "naive-ui"
-import { USERNAME_CLASS_RE } from "utils/constants"
-
-/**
- * 用户名：班级前缀（`ks253`）淡一档，名字加粗 —— 一个班的人前缀都一样，
- * 老师要认的是后面那段。`muted` 用在学生看别人的那几行（看得到结果、看不到代码）。
- */
-const props = defineProps<{ username: string; muted?: boolean }>()
-
-const theme = useThemeVars()
-
-const parts = computed(() => {
-  const match = props.username.match(USERNAME_CLASS_RE)
-  if (!match) return { prefix: "", name: props.username }
-  return { prefix: match[0], name: props.username.slice(match[0].length) || match[0] }
-})
-</script>
-
-<template>
-  <span class="user" :class="{ muted }" :title="username">
-    <span v-if="parts.prefix" class="prefix">{{ parts.prefix }}</span>
-    <span class="name">{{ parts.name }}</span>
-  </span>
-</template>
-
-<style scoped>
-.user {
-  white-space: nowrap;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  min-width: 0;
-}
-
-.prefix {
-  color: v-bind("theme.textColor3");
-}
-
-.name {
-  font-weight: 600;
-  color: v-bind("theme.textColor1");
-}
-
-.muted .name {
-  font-weight: 400;
-  color: v-bind("theme.textColor2");
-}
-</style>