fix(e2e): run subprocess harness and proxy probe via tsx

Node's strip-only TypeScript mode cannot execute workspace source that
uses parameter properties. Use the monorepo tsx binary for runNodeMain and
the proxy e2e probe (.mts for top-level await).

Author: hopelynd

packages/e2e/src/run-subprocess.ts

@@ -1,5 +1,7 @@
 import { execFile } from "child_process";
+import { join } from "path";
 import { promisify } from "util";
+import { monorepoRoot } from "./monorepo-root.ts";
 
 const execFileAsync = promisify(execFile);
 
@@ -9,14 +11,21 @@ export interface RunCliResult {
   exitCode: number;
 }
 
-/** 子进程执行指定 main.ts 入口 */
+/** monorepo 根目录下的 tsx 可执行文件 */
+export function resolveTsxBin(): string {
+  const root = monorepoRoot();
+  const name = process.platform === "win32" ? "tsx.cmd" : "tsx";
+  return join(root, "node_modules", ".bin", name);
+}
+
+/** 子进程通过 tsx 执行指定 main.ts 入口 */
 export async function runNodeMain(
   mainTs: string,
   args: string[],
   options: { cwd: string; env?: NodeJS.ProcessEnv } = { cwd: process.cwd() },
 ): Promise<RunCliResult> {
   try {
-    const { stdout, stderr } = await execFileAsync("node", [mainTs, ...args], {
+    const { stdout, stderr } = await execFileAsync(resolveTsxBin(), [mainTs, ...args], {
       cwd: options.cwd,
       encoding: "utf8",
       maxBuffer: 32 * 1024 * 1024,

packages/runtime/tests/proxy.e2e.test.ts

@@ -7,6 +7,7 @@ import { dirname, join } from "path";
 import { fileURLToPath } from "url";
 import { promisify } from "util";
 import { afterAll, beforeAll, describe, expect, test } from "vite-plus/test";
+import { resolveTsxBin } from "e2e/runner";
 
 const execFileAsync = promisify(execFile);
 
@@ -46,7 +47,7 @@ beforeAll(async () => {
   proxyUrl = `http://127.0.0.1:${(proxy.address() as AddressInfo).port}`;
 
   scriptDir = mkdtempSync(join(tmpdir(), "bl-proxy-e2e-"));
-  scriptPath = join(scriptDir, "probe.ts");
+  scriptPath = join(scriptDir, "probe.mts");
   writeFileSync(scriptPath, PROBE_SCRIPT);
 });
 
@@ -68,7 +69,7 @@ async function runProbe(
   envOverrides: NodeJS.ProcessEnv,
 ): Promise<{ exitCode: number; stderr: string }> {
   try {
-    await execFileAsync("node", [scriptPath], {
+    await execFileAsync(resolveTsxBin(), [scriptPath], {
       cwd: runtimePackageRoot,
       encoding: "utf8",
       env: { ...process.env, NODE_NO_WARNINGS: "1", ...PROXY_ENV_CLEARED, ...envOverrides },