fnnas_save

• Based on the official fnnas.com Arm64 release, preserving the complete stock experience.
• Extends support to a wider range of Amlogic, Rockchip, and Allwinner devices.
• 基于 fnnas.com 官方 Arm64 镜像构建，完整保留官方原版系统体验。
• 扩展支持更多基于 Amlogic、Rockchip 及 Allwinner 平台的设备。