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/winforms/DateTimePickerControl.vue

@@ -33,8 +33,7 @@ function pick(event: Event) {
   if (!picked) return
   const [date, time] = value.value.split('T')
   const withSeconds = (t: string) => (t.length === 5 ? `${t}:00` : t)
-  const next =
-    inputType.value === 'date' ? `${picked}T${time}` : inputType.value === 'time' ? `${date}T${withSeconds(picked)}` : withSeconds(picked)
+  const next = inputType.value === 'date' ? `${picked}T${time}` : inputType.value === 'time' ? `${date}T${withSeconds(picked)}` : withSeconds(picked)
   props.act({ action: 'pick', value: next })
 }