Proton Drive Backup

Proton Drive panel: Backup creates dated, Déjà Dup-style copies of a chosen file or folder on your Drive; Browse lets you navigate, download from, or upload to any folder. Uses a specific, pinned CLI build (not the AUR package) for predictability, downloaded and verified by the plugin itself. Deliberately no background sync — every action is explicit and one-shot, since Proton Drive lacks a safe, documented way to build real-time multi-device sync. See README for the full reasoning.