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- electron-builder: linux targets = deb, flatpak, tar.gz, pacman; win = nsis. - updater.ts: Linux is notify-only (deb/pacman are package-manager owned, flatpak is sandboxed) — reads the same Codeberg feed as Windows and shows a "Blap X is available" desktop notification linking to HOW-TO-UPDATE.md. Windows/macOS keep electron-updater in-place install. - HOW-TO-UPDATE.md: per-format update instructions. Version stays 1.0.0. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>