第 0 阶段：教材项目 2 任务 1 在网页中原样运行

- runtime：仿真 WinForms 子集（Form、Button、Label、TextBox、ComboBox、
  GroupBox、Timer、MessageBox、界面线程消息循环、跨线程检查）、
  教材设备类库（DeviceCtrlHelper、LED 控件）、运行器（常驻编译服务 + 运行模式）
- server：Bun + Hono，WebSocket 会话，每次运行一个进程，消息转发
- web：Vue + Naive UI，WinForms 风格窗体渲染、MessageBox、实训台 LED 屏
- 端到端测试与 100 个程序并发的压力测试
- 教材逐任务摘要（docs/教材摘要）

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

server/src/compile-service.ts

@@ -0,0 +1,72 @@
+import type { Subprocess } from 'bun'
+import type { Diagnostic } from '@iot/shared'
+import { RUNNER_DLL, readLines } from './runner-process'
+
+export interface CompileResult {
+  ok: boolean
+  diagnostics: Diagnostic[]
+  ms: number
+}
+
+type Reply = ({ type: 'compiled' } & CompileResult) | { type: 'compileFailed'; message: string }
+
+/**
+ * 常驻编译服务：全服务器共用一个 C# 编译进程（Roslyn 只加载一次），按请求编号对应回复。
+ * 进程意外退出时，挂起的请求全部失败，下一次请求自动重启。
+ */
+class CompileService {
+  private proc?: Subprocess<'pipe', 'pipe', 'inherit'>
+  private ready?: Promise<void>
+  private nextId = 1
+  private readonly pending = new Map<number, { resolve: (r: CompileResult) => void; reject: (e: Error) => void }>()
+
+  /** 编译工程目录；成功时程序集写到同一目录 */
+  async compile(dir: string): Promise<CompileResult> {
+    await this.start()
+    const id = this.nextId++
+    const result = new Promise<CompileResult>((resolve, reject) => this.pending.set(id, { resolve, reject }))
+    this.proc!.stdin.write(`${JSON.stringify({ id, dir })}\n`)
+    this.proc!.stdin.flush()
+    return result
+  }
+
+  stop() {
+    this.proc?.kill()
+  }
+
+  /** 服务器启动时调用，提前完成编译器的加载和预热 */
+  start() {
+    if (this.ready) return this.ready
+    const proc = Bun.spawn(['dotnet', RUNNER_DLL, 'compile-server'], {
+      stdin: 'pipe',
+      stdout: 'pipe',
+      stderr: 'inherit',
+      env: { ...process.env, DOTNET_CLI_TELEMETRY_OPTOUT: '1', DOTNET_NOLOGO: '1' },
+    })
+    this.proc = proc
+    this.ready = new Promise<void>((resolveReady) => {
+      void readLines(proc.stdout, (line) => {
+        const message = JSON.parse(line) as ({ type: 'ready' } | Reply) & { id?: number }
+        if (message.type === 'ready') {
+          resolveReady()
+          return
+        }
+        const waiter = this.pending.get(message.id!)
+        if (!waiter) return
+        this.pending.delete(message.id!)
+        if (message.type === 'compiled') waiter.resolve(message)
+        else waiter.reject(new Error(message.message))
+      })
+    })
+    proc.exited.then((code) => {
+      if (this.proc !== proc) return
+      this.proc = undefined
+      this.ready = undefined
+      for (const waiter of this.pending.values()) waiter.reject(new Error(`编译服务意外退出（${code}）`))
+      this.pending.clear()
+    })
+    return this.ready
+  }
+}
+
+export const compileService = new CompileService()