Linux distribution (.AppImage / .deb)

[ikseong00]

Goal

Produce Linux builds (.AppImage for portable, .deb for Debian/Ubuntu users).

Why

Linux users currently locked out. The dev workflow works for them but no install path.

Acceptance

• package.json build.linux configured (AppImage + deb targets).
• CI builds on ubuntu-latest produce both artifacts.
• App launches end-to-end on Ubuntu 22.04+: install via apt or run AppImage, pet hatches, statusLine registers.
• Tray icon visible in GNOME / KDE.

Hints

• AppImage is the easiest, no install needed by user.
• For .deb, electron-builder handles category/depends automatically.
• Test the always-on-top window flag on Wayland — has been flaky historically.

Out of scope

• Snap / Flatpak packaging.
• Arch (AUR).