项目 5 补齐：旧版线程 API（Suspend / Resume / Abort）与 ListBox

- 编译时把 Thread 的 Suspend / Resume / Abort、ThreadState、Sleep、new Thread 改写成平台的
  协作式实现：被挂起或终止的线程在 Sleep、后台改控件、调设备类库、弹提示框时停下或结束；
  ThreadStateException 等行为与 .NET Framework 一致；编辑器不再提示"已过时"
- ListBox：列表项、单选、SelectedIndexChanged 先于 Click、删除选中项后取消选中；
  ComboBox 与 ListBox 共用 ListControl 和列表项集合；设计器工具箱加"列表框"
- 评分规则的"包含"对列表框检查所有列表项
- 示例：项目 5 任务 2（烟雾，线程）、任务 3（推送灾情，二维数组、两个窗体、ListBox），
  参考答案修正书上直接 Abort 挂起线程、烟雾记成"发现火情"的问题
- 一直不换行的 Console 输出攒满 4096 字符先发出，避免占满内存
- 测试：旧版线程 API、ListBox 事件顺序、两个示例的端到端和评分测试

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

web/src/designer/catalog.ts

@@ -159,6 +159,26 @@ export const CONTROLS: ControlDef[] = [
     events: [...COMMON_EVENTS, { name: 'SelectedIndexChanged', label: '选中项改变', ...EVENT }, { name: 'DropDown', label: '展开列表', ...EVENT }],
     initial: () => [['FormattingEnabled', bool(true)], ['Size', size(121, 20)]],
   },
+  {
+    type: `${FORMS}.ListBox`,
+    label: '列表框',
+    group: '常用控件',
+    namePrefix: 'listBox',
+    defaultEvent: 'SelectedIndexChanged',
+    props: [
+      ...COMMON_PROPS.filter((p) => p.name !== 'Text'),
+      { name: 'Items', label: '列表项', description: '列表里的项，每行一项', type: 'items', category: '数据' },
+      {
+        name: 'BorderStyle', label: '边框', description: '边框', type: 'enum', enumType: `${FORMS}.BorderStyle`,
+        options: ['None', 'FixedSingle', 'Fixed3D'], optionLabels: { None: '无', FixedSingle: '单线', Fixed3D: '立体' }, default: enumValue(`${FORMS}.BorderStyle`, 'Fixed3D'), category: '外观',
+      },
+    ],
+    events: [
+      ...COMMON_EVENTS.filter((e) => e.name !== 'TextChanged'),
+      { name: 'SelectedIndexChanged', label: '选中项改变', ...EVENT },
+    ],
+    initial: () => [['FormattingEnabled', bool(true)], ['ItemHeight', int(12)], ['Size', size(120, 88)]],
+  },
   {
     type: `${FORMS}.CheckBox`,
     label: '复选框',

web/src/designer/preview.ts

@@ -63,7 +63,7 @@ export function previewTree(doc: DesignerDocument): ControlNode {
     const props: Record<string, unknown> = { ...DEVICE_DEFAULTS[type], ...propsOf(doc, name) }
     // 设计时即使 Visible = false 也显示出来（和 VS 一样），方便选中和编辑
     props.Visible = true
-    if (type === 'System.Windows.Forms.ComboBox') props.Items = getItems(doc, name).map((item) => {
+    if (type === 'System.Windows.Forms.ComboBox' || type === 'System.Windows.Forms.ListBox') props.Items = getItems(doc, name).map((item) => {
       const v = parseValue(item)
       return v.kind === 'string' ? v.value : item
     })

web/src/winforms/ControlView.vue

@@ -48,6 +48,9 @@ function selectItem(index: number) {
   dropDownOpen.value = false
   act({ action: 'select', index })
 }
+
+// ListBox
+const itemHeight = computed(() => `${(p.value.ItemHeight as number | undefined) ?? 12}px`)
 </script>
 
 <template>
@@ -108,6 +111,27 @@ function selectItem(index: number) {
     </ul>
   </div>
 
+  <!-- ListBox：点空白处只触发 Click，点某一项先选中再触发 Click -->
+  <div
+    v-else-if="node.type === 'ListBox'"
+    class="wf-control wf-listbox"
+    :class="[`wf-listbox-border-${p.BorderStyle ?? 'Fixed3D'}`, { 'wf-disabled': !enabled }]"
+    :style="style"
+    @click.self="act({ action: 'click' })"
+  >
+    <div
+      v-for="(item, index) in items"
+      :key="index"
+      class="wf-listbox-item"
+      :class="{ 'wf-listbox-selected': index === p.SelectedIndex }"
+      :style="{ height: itemHeight, lineHeight: itemHeight }"
+      @click="act({ action: 'select', index })"
+      @dblclick="act({ action: 'doubleClick' })"
+    >
+      {{ item }}
+    </div>
+  </div>
+
   <!-- CheckBox / RadioButton：自绘勾选框，状态完全由运行器决定（点击只上报，不在浏览器里自行切换） -->
   <div
     v-else-if="node.type === 'CheckBox' || node.type === 'RadioButton'"

web/src/winforms/winforms.css

@@ -151,6 +151,36 @@
   color: #fff;
 }
 
+.wf-listbox {
+  overflow-y: auto;
+  overflow-x: hidden;
+  background: #fff;
+  cursor: default;
+}
+
+.wf-listbox-border-Fixed3D {
+  border: 1px solid #828790;
+}
+
+.wf-listbox-border-FixedSingle {
+  border: 1px solid #646464;
+}
+
+.wf-listbox-item {
+  padding: 0 2px;
+  white-space: pre;
+  overflow: hidden;
+}
+
+.wf-listbox-selected {
+  background: #0078d7;
+  color: #fff;
+}
+
+.wf-disabled .wf-listbox-selected {
+  background: #bfbfbf;
+}
+
 .wf-check {
   display: flex;
   align-items: center;