feat(题目页): 手机上写代码顺手多了：键盘上面多一排常用符号（括号、引号、冒号、缩进…点一下就进去，括号自动配对），代码字号改小、长行折行不再看不见右半截；输入输出说明上下排、例子不再被左边两列标签挤窄；题单里那条不再超出屏幕

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

apps/web/src/oj/learn/components/CodeRunBlock.vue

@@ -10,7 +10,7 @@ import { explainRuntimeError } from "oj/problem/utils/runtimeError"
 import { useAuthModalStore } from "shared/store/authModal"
 import { useUserStore } from "shared/store/user"
 import { mainWrapExtensions, wrapMain } from "../wrapMain"
-import { hangWrapExtensions } from "../hangIndent"
+import { hangWrapExtensions } from "shared/extensions/hangIndent"
 import { useBreakpoints } from "shared/composables/breakpoints"
 
 const CodeEditor = defineAsyncComponent(() => import("shared/components/CodeEditor.vue"))