✨ feat(update): dev 通道同步生成 latest-dev.json 静态清单

- dev-build 发版流程上传 latest-dev.json 到 dev-latest Release
- 客户端 dev 通道优先读取 releases/download/dev-latest/latest-dev.json
- build-release 本地打包按版本自动选择 latest / latest-dev
- SHA256SUMS 生成时跳过清单文件本身

.github/workflows/release.yml

@@ -1071,6 +1071,9 @@ jobs:
           FILES=()
           while IFS= read -r file; do
             if [ -n "$file" ]; then
+              case "$file" in
+                SHA256SUMS|latest.json|latest-dev.json) continue ;;
+              esac
               FILES+=("$file")
             fi
           done < <(find . -maxdepth 1 -type f ! -name SHA256SUMS -exec basename {} \; | sort)