fix(release): 改用改写配置文件替代 -c.publish.0.url 覆盖更新源

electron-builder 会把 -c.publish.0.url 解析成对象 {publish:{0:{url}}} 而非数组元素，触发 ValidationError: configuration.publish should be one of these，导致 v0.28.8 构建失败。

改为在构建前用 sed 行锚定改写 electron-builder.yml 中 generic provider 的 url，并打印改写结果便于核对；未配置 DOWNLOAD_BASE_URL 时保持配置文件原值。

Author: Aparencia

.github/workflows/release.yml

@@ -73,12 +73,16 @@ jobs:
         run: |
           cd client
           if [ -n "$DOWNLOAD_BASE_URL" ]; then
-            echo "Update feed -> $DOWNLOAD_BASE_URL"
-            npm run electron:build -- --publish never -c.publish.0.url="$DOWNLOAD_BASE_URL"
+            # 不能用 -c.publish.0.url 覆盖：electron-builder 会将其解析成
+            # 对象 {publish:{0:{url}}} 而非数组元素，触发 schema 校验失败。
+            # 故直接改写配置文件中 generic provider 的 url（行锚定精确匹配）。
+            sed -i "s|^    url: https://entropydecrease.com/downloads$|    url: ${DOWNLOAD_BASE_URL%/}|" electron-builder.yml
+            echo 'generic provider after rewrite:'
+            grep -A1 'provider: generic' electron-builder.yml
           else
             echo "Update feed -> 默认（electron-builder.yml 中的自建服务器）"
-            npm run electron:build -- --publish never
           fi
+          npm run electron:build -- --publish never
       - uses: actions/upload-artifact@v4
         with:
           name: release-${{ matrix.os }}