style(提交列表): 右栏的代码字太小，调到和题目页编辑器一样的 20px

行高跟着从 30 调到 32，标红的报错行仍和行号逐行对齐。

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

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

@@ -18,7 +18,7 @@ const props = withDefaults(
     fontSize?: number
     lineHeight?: number
   }>(),
-  { markLine: null, fontSize: 18, lineHeight: 30 },
+  { markLine: null, fontSize: 20, lineHeight: 32 },
 )
 
 const theme = useThemeVars()