test: 集成夹具的代理改为读 HTTPS_PROXY，不再写死本机端口

src/_test/electron/ai-scope.integration.js

@@ -75,8 +75,10 @@ app.whenReady().then(async () => {
   fs.mkdirSync(path.dirname(epubPath), { recursive: true });
   if (!fs.existsSync(epubPath)) {
     const { fetch: uf, ProxyAgent } = require('undici');
+    // 代理只在设了 HTTPS_PROXY 时用，写死本机代理会让 CI 直接 ECONNREFUSED
+    const proxy = process.env.HTTPS_PROXY || process.env.https_proxy || '';
     const r = await uf('https://www.gutenberg.org/ebooks/11.epub.noimages', {
-      dispatcher: new ProxyAgent({ uri: 'http://127.0.0.1:7890', connectTimeout: 30000 })
+      dispatcher: proxy ? new ProxyAgent({ uri: proxy, connectTimeout: 30000 }) : undefined
     });
     fs.writeFileSync(epubPath, Buffer.from(await r.arrayBuffer()));
   }

src/_test/electron/annotation.integration.js

@@ -18,12 +18,15 @@ async function wait(ms) {
   return new Promise((resolve) => setTimeout(resolve, ms));
 }
 
+// 代理只在设了 HTTPS_PROXY 时用。写死本机代理会让没有代理的环境（CI）
+// 直接 ECONNREFUSED，取不到夹具。
 async function ensurePdf() {
   if (fs.existsSync(PDF_CACHE)) return;
   fs.mkdirSync(path.dirname(PDF_CACHE), { recursive: true });
   const { fetch, ProxyAgent } = require('undici');
+  const proxy = process.env.HTTPS_PROXY || process.env.https_proxy || '';
   const response = await fetch('https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf', {
-    dispatcher: new ProxyAgent({ uri: 'http://127.0.0.1:7890', connectTimeout: 30000 })
+    dispatcher: proxy ? new ProxyAgent({ uri: proxy, connectTimeout: 30000 }) : undefined
   });
   if (!response.ok) throw new Error(`PDF 下载失败：${response.status}`);
   fs.writeFileSync(PDF_CACHE, Buffer.from(await response.arrayBuffer()));