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>

samples/p1-t2-面向对象特性/checks.yaml

@@ -2,14 +2,14 @@
 # 格式说明见 server/src/grading/checks.ts
 - title: 计算器能正确计算（装箱与拆箱）
   steps:
-    - text: { control: txtNum1, value: "7" }
-    - text: { control: txtNum2, value: "2" }
-    - select: { control: cmboxType, item: "+" }
+    - text: { control: txtNum1, value: '7' }
+    - text: { control: txtNum2, value: '2' }
+    - select: { control: cmboxType, item: '+' }
     - click: btnCalculate
-    - expect: { control: txtResult, text: "9" }
-    - select: { control: cmboxType, item: "/" }
+    - expect: { control: txtResult, text: '9' }
+    - select: { control: cmboxType, item: '/' }
     - click: btnCalculate
-    - expect: { control: txtResult, text: "3.5" }
+    - expect: { control: txtResult, text: '3.5' }
 
 - title: 多态：不同国家的人说不同的语言
   steps: