Enhance Zsh and Config Commands, Update Network Configuration

- Implemented comprehensive Zsh installation command with multiple network scenarios
- Added 'config show' subcommand to display agent configuration
- Updated version command to print version information
- Modified Network configuration to clarify internet connectivity status
- Improved download utility with additional file existence checks
- Updated agent-wdd rules and documentation

agent-wdd/utils/DownloadUtils.go

@@ -39,5 +39,10 @@ func DownloadFile(url string, path string) (bool, string) {
 		return false, fmt.Sprintf("写入文件失败: %v", err)
 	}
 
+	// 检查文件是否存在
+	if !FileExistAndNotNull(path) {
+		return false, fmt.Sprintf("文件下载失败: 文件为空 => %s", path)
+	}
+
 	return true, fmt.Sprintf("文件下载成功: %s", path)
 }