[Feature] Official Flatpak support on Flathub

[yeahwong]

Hi, thanks for your great work!

I’d like to suggest providing an official Flatpak version on Flathub. A third-party Flatpak existed before, but it’s no longer updated.

Having an official Flatpak would:

• Make installation and updates easier for Linux users
• Be more secure and trustworthy than unofficial builds
• Work across all major Linux distributions thanks to Flatpak sandboxing
• Reach more users through the Flathub platform
• Offer a better desktop integration and user experience than Snap, especially on non-Ubuntu systems
• Get a verified badge on Flathub, helping users quickly identify it's an official release

Hope you’ll consider this—many users would really appreciate it.；

Thanks again!