Linux desktop is now fully covered: alongside the .deb there are portable tar.gz and AppImage builds (also the answer for Arch, see #11), with in-app self-update for tar.gz installs. This release also brings the repo's first automated test suite (39 xUnit tests, now running in CI) plus updater security hardening. iOS gets narrow-phone UI fixes and a build fix; Android is unchanged (still 1.0.1).
Linux: download the .deb for Debian/Ubuntu, the tar.gz anywhere else (Arch included), or the AppImage to just run it. tar.gz installs self-update from future releases; .deb/AppImage users update via their usual path. On Linux open TCP 9898 (ufw/firewalld) so the console can pull PKGs.
Verified: dotnet test 39/39, win-x64 publish + installer, CI-built .deb/tar.gz/AppImage, tar.gz member layout (PkgSender at root).