fix: add cloud web access route alias

internal/dev-entrypoint/cloud-web-runtime.test.mjs

@@ -1,5 +1,8 @@
 import assert from "node:assert/strict";
+import { mkdtemp, rm, writeFile } from "node:fs/promises";
 import { createServer } from "node:http";
+import os from "node:os";
+import path from "node:path";
 import test from "node:test";
 
 import { createCloudWebServer } from "./cloud-web-runtime.mjs";
@@ -43,6 +46,36 @@ test("cloud web auth requests are proxied once", async () => {
   }
 });
 
+test("cloud web serves access deep link through the React shell", async () => {
+  const root = await mkdtemp(path.join(os.tmpdir(), "hwlab-cloud-web-runtime-"));
+  await writeFile(path.join(root, "index.html"), "<div id=\"root\"></div>\n", "utf8");
+  const cloudWeb = createCloudWebServer({
+    serviceId: "hwlab-cloud-web",
+    roots: [root],
+    cloudApiBaseUrl: "http://127.0.0.1:1",
+    healthPayload: () => ({ status: "ok" }),
+    sendJson(response, statusCode, body) {
+      const payload = JSON.stringify(body);
+      response.writeHead(statusCode, {
+        "content-type": "application/json",
+        "content-length": Buffer.byteLength(payload)
+      });
+      response.end(payload);
+    }
+  });
+  await listen(cloudWeb);
+
+  try {
+    const response = await fetch(`${serverUrl(cloudWeb)}/access`);
+    assert.equal(response.status, 200);
+    assert.equal(response.headers.get("content-type"), "text/html; charset=utf-8");
+    assert.equal(await response.text(), "<div id=\"root\"></div>\n");
+  } finally {
+    await close(cloudWeb);
+    await rm(root, { recursive: true, force: true });
+  }
+});
+
 function listen(server) {
   return new Promise((resolve, reject) => {
     server.once("error", reject);