用 bun fmt 格式化全部代码和文档

- bunfig.toml 的 [fmt]：不写分号、单引号、一行最长 160，和原来的写法一致
- .prettierignore：docs/教材摘要/ 是书上的摘录，不格式化
- 模板里一行写两条语句的事件处理（@keydown.delete、@dblclick）改成调用方法：去掉分号后拆成两行，Vue 编译不过

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

web/src/teacher/AssignmentsPanel.vue

@@ -53,8 +53,7 @@ function review(row: Row) {
   void router.push(`/teacher/assignments/${row.id}`)
 }
 
-const formatTime = (ms: number) =>
-  new Date(ms).toLocaleString('zh-CN', { month: 'numeric', day: 'numeric', hour: '2-digit', minute: '2-digit' })
+const formatTime = (ms: number) => new Date(ms).toLocaleString('zh-CN', { month: 'numeric', day: 'numeric', hour: '2-digit', minute: '2-digit' })
 
 const columns: DataTableColumns<Row> = [
   { title: '作业', key: 'title' },