chore(依赖): 删掉三个没用到的 vue-flow 插件，代码高亮全站只注册一份

- @vue-flow/minimap、node-resizer、node-toolbar 一处引用都没有
- App.vue 给 n-code 另建了一份 highlight.js，还注册着判题机早就不认的 Java、
  JavaScript、Go；改成空闲时加载 shared/highlight.ts 那份。62 条这三种语言的
  历史提交改为不上色显示

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

apps/web/package.json

@@ -24,9 +24,6 @@
     "@vue-flow/background": "^1.3.2",
     "@vue-flow/controls": "^1.1.3",
     "@vue-flow/core": "^1.48.2",
-    "@vue-flow/minimap": "^1.5.4",
-    "@vue-flow/node-resizer": "^1.5.1",
-    "@vue-flow/node-toolbar": "^1.1.1",
     "@vueuse/core": "^15.0.0",
     "@vueuse/router": "^15.0.0",
     "@wangeditor-next/editor": "^6.5.0",

apps/web/src/App.vue

@@ -43,47 +43,15 @@ watch(
   { immediate: true },
 )
 
-// 延迟加载 highlight.js，避免阻塞首屏
-const hljsInstance = ref<any>(null)
-const loadHighlightJS = async () => {
-  if (hljsInstance.value) return hljsInstance.value
-
-  // 逐个取 .default，不要在 Promise.all 后面 map —— 那样元组会塌成
-  // (HLJSApi | LanguageFn)[]，每个元素都变成联合类型，hljs 上就找不到方法了
-  const [core, c, cpp, python, java, javascript, go, sql] = await Promise.all([
-    import("highlight.js/lib/core"),
-    import("highlight.js/lib/languages/c"),
-    import("highlight.js/lib/languages/cpp"),
-    import("highlight.js/lib/languages/python"),
-    import("highlight.js/lib/languages/java"),
-    import("highlight.js/lib/languages/javascript"),
-    import("highlight.js/lib/languages/go"),
-    import("highlight.js/lib/languages/sql"),
-  ])
-  const hljs = core.default
-
-  hljs.registerLanguage("c", c.default)
-  hljs.registerLanguage("python", python.default)
-  hljs.registerLanguage("cpp", cpp.default)
-  hljs.registerLanguage("java", java.default)
-  hljs.registerLanguage("javascript", javascript.default)
-  hljs.registerLanguage("go", go.default)
-  hljs.registerLanguage("sql", sql.default)
-
-  hljsInstance.value = hljs
-  return hljs
-}
-
-// 在空闲时预加载
+// n-code（提交详情、看代码的弹框）用的 highlight.js，空闲时再加载，不挡首屏
+const hljsInstance = shallowRef<typeof import("shared/highlight").hljs>()
 onMounted(() => {
-  if ("requestIdleCallback" in window) {
-    requestIdleCallback(() => loadHighlightJS())
-  } else {
-    setTimeout(() => loadHighlightJS(), 1000)
+  const load = async () => {
+    hljsInstance.value = (await import("shared/highlight")).hljs
   }
+  if ("requestIdleCallback" in window) requestIdleCallback(load)
+  else setTimeout(load, 1000)
 })
-
-provide("hljs", hljsInstance)
 </script>
 
 <template>

apps/web/src/shared/highlight.ts

@@ -1,5 +1,6 @@
 /**
- * 代码高亮：自学的练一练、以及 Markdown.vue 里的代码块共用这一份（配色在 highlight.css）。
+ * 代码高亮：自学的练一练、Markdown.vue 里的代码块、以及 App.vue 交给 n-code 的都是这一份
+ * （配色在 highlight.css）。
  * 只注册判题机认的几种语言，别的语言和不标语言的代码块按原文显示。
  */
 import hljs from "highlight.js/lib/core"
@@ -13,6 +14,8 @@ hljs.registerLanguage("c", c)
 hljs.registerLanguage("cpp", cpp)
 hljs.registerLanguage("sql", sql)
 
+export { hljs }
+
 const LANGUAGE_ALIASES: Record<string, string> = {
   python: "python",
   py: "python",