optimize: 检查更新和获取远程配置功能，避免被GFW拦截。

packages/core/src/config.js

@@ -59,7 +59,12 @@ const configApi = {
     // eslint-disable-next-line handle-callback-err
     return new Promise((resolve, reject) => {
       log.info('开始下载远程配置:', remoteConfigUrl)
-      request(remoteConfigUrl, (error, response, body) => {
+
+      const headers = {}
+      if (remoteConfigUrl.startsWith('https://raw.githubusercontent.com/')) {
+        headers['Server-Name'] = 'baidu.com'
+      }
+      request(remoteConfigUrl, headers, (error, response, body) => {
         if (error) {
           log.error('下载远程配置失败, error:', error, ', response:', response, ', body:', body)
           reject(error)

packages/gui/src/bridge/update/backend.js

@@ -141,7 +141,7 @@ function updateHandle (app, api, win, beforeQuit, quit, log) {
   // 检查更新
   const releasesApiUrl = 'https://api.github.com/repos/docmirror/dev-sidecar/releases'
   async function checkForUpdatesFromGitHub () {
-    request(releasesApiUrl, { headers: { 'User-Agent': 'DS/' + curVersion } }, (error, response, body) => {
+    request(releasesApiUrl, { headers: { 'User-Agent': 'DS/' + curVersion, 'Server-Name': 'baidu.com' } }, (error, response, body) => {
       try {
         if (error) {
           log.error('检查更新失败:', error)