fix: 统一上游不可达错误文案

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

@@ -6,6 +6,7 @@ import { promisify } from "node:util";
 
 import { isCloudWebSseRoute, proxyCloudApiRequest, upstreamRequestHeaders } from "./cloud-web-proxy.mjs";
 import { cloudWebProxyRoutePolicy } from "./cloud-web-routes.mjs";
+import { UPSTREAM_UNAVAILABLE_ERROR_CODE, UPSTREAM_UNAVAILABLE_MESSAGE } from "./http.mjs";
 const gzipAsync = promisify(gzip);
 const GZIP_MIN_BYTES = 1024;
 const CLIENT_DISCONNECT_ERROR_CODES = new Set([
@@ -443,12 +444,10 @@ export async function proxyCloudApi({ request, response, url, cloudApiBaseUrl, c
       return;
     }
     const timedOut = error.timedOut === true || /timed out after \d+ms/iu.test(error.message);
-    const code = timedOut ? "cloud_api_proxy_timeout" : "cloud_api_proxy_failed";
+    const code = UPSTREAM_UNAVAILABLE_ERROR_CODE;
     const category = timedOut ? "timeout" : "proxy";
     const traceId = request.headers["x-trace-id"] || null;
-    const userMessage = timedOut
-      ? "Code Agent 代理等待 cloud-api 超过 " + cloudApiProxyTimeoutMs + "ms；输入已保留，可稍后重试。"
-      : "Code Agent 代理暂时无法连接 cloud-api；输入已保留，可稍后重试。";
+    const userMessage = UPSTREAM_UNAVAILABLE_MESSAGE;
     sendJson(response, 502, {
       status: "failed",
       error: {

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

@@ -54,6 +54,45 @@ test("cloud web auth requests are proxied once", async () => {
   }
 });
 
+test("cloud web proxy reports a unified upstream unavailable error", async () => {
+  const cloudWeb = createCloudWebServer({
+    serviceId: "hwlab-cloud-web",
+    cloudApiBaseUrl: "http://127.0.0.1:1",
+    cloudApiProxyTimeoutMs: 1000,
+    healthPayload: () => ({ status: "ok" }),
+    roots: [],
+    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)}/v1/web-performance/summary?window=15m`, {
+      headers: { accept: "application/json", "x-trace-id": "trc_proxy_upstream_unavailable" }
+    });
+    assert.equal(response.status, 502);
+    const payload = await response.json();
+    assert.equal(payload.status, "failed");
+    assert.equal(payload.error.code, "upstream_unavailable");
+    assert.equal(payload.error.layer, "proxy");
+    assert.equal(payload.error.retryable, true);
+    assert.equal(payload.error.userMessage, "暂时无法连接上游。");
+    assert.equal(payload.error.message, "暂时无法连接上游。");
+    assert.equal(payload.error.blocker.code, "upstream_unavailable");
+    assert.equal(payload.error.blocker.summary, "暂时无法连接上游。");
+    assert.equal(payload.reason, "暂时无法连接上游。");
+    assert.doesNotMatch(JSON.stringify(payload), /Code Agent|输入已保留|稍后重试/u);
+  } finally {
+    await close(cloudWeb);
+  }
+});
+
 test("cloud web proxies Admin Access write routes", async () => {
   const upstreamRequests = [];
   const upstream = createServer(async (request, response) => {

internal/dev-entrypoint/http.mjs

@@ -4,6 +4,8 @@ import { buildMetadataFromEnv } from "../build-metadata.mjs";
 import { DEV_ENDPOINT, ENVIRONMENT_DEV } from "../protocol/index.mjs";
 
 const DEFAULT_PROXY_TIMEOUT_MS = 180000;
+export const UPSTREAM_UNAVAILABLE_ERROR_CODE = "upstream_unavailable";
+export const UPSTREAM_UNAVAILABLE_MESSAGE = "暂时无法连接上游。";
 
 export function parsePort(value, fallback) {
   const parsed = Number.parseInt(value ?? "", 10);
@@ -123,11 +125,9 @@ export function proxyHttpRequest({ request, response, upstream, timeoutMs = DEFA
       return;
     }
     settled = true;
-    const code = timedOut ? "proxy_timeout" : "upstream_unavailable";
+    const code = UPSTREAM_UNAVAILABLE_ERROR_CODE;
     const category = timedOut ? "timeout" : "proxy";
-    const userMessage = timedOut
-      ? `Code Agent 代理等待上游超过 ${timeoutMs}ms；输入已保留，可稍后重试。`
-      : "Code Agent 代理暂时无法连接上游；输入已保留，可稍后重试。";
+    const userMessage = UPSTREAM_UNAVAILABLE_MESSAGE;
     sendJson(response, 502, {
       status: "failed",
       error: {

internal/dev-entrypoint/http.test.mjs

@@ -187,18 +187,19 @@ test("dev entrypoint proxy returns 502 when hard timeout expires", async () => {
     assert.equal(response.status, 502);
     const payload = await response.json();
     assert.equal(payload.status, "failed");
-    assert.equal(payload.error.code, "proxy_timeout");
+    assert.equal(payload.error.code, "upstream_unavailable");
     assert.equal(payload.error.layer, "proxy");
     assert.equal(payload.error.category, "timeout");
     assert.equal(payload.error.retryable, true);
     assert.equal(payload.error.timeoutMs, 50);
     assert.equal(payload.error.traceId, "trc_dev-entrypoint-proxy-timeout");
-    assert.match(payload.error.userMessage, /超过 50ms/u);
-    assert.match(payload.error.message, /输入已保留/u);
-    assert.equal(payload.error.blocker.code, "proxy_timeout");
+    assert.equal(payload.error.userMessage, "暂时无法连接上游。");
+    assert.equal(payload.error.message, "暂时无法连接上游。");
+    assert.equal(payload.error.blocker.code, "upstream_unavailable");
     assert.equal(payload.error.blocker.retryable, true);
     assert.equal(payload.traceId, "trc_dev-entrypoint-proxy-timeout");
-    assert.match(payload.message, /Code Agent 代理等待上游超过 50ms/u);
+    assert.equal(payload.message, "暂时无法连接上游。");
+    assert.doesNotMatch(JSON.stringify(payload), /Code Agent|输入已保留|稍后重试/u);
   } finally {
     await close(proxy);
     await close(upstream);