An AppImage's launcher runs the desktop file's Exec line and appends the
arguments it was given, so with `Exec=wanderbooks gui` the AppImage's
`update` ran `wanderbooks gui update`: the program's own commands were
unreachable through it. The desktop files now say plain `Exec=wanderbooks`
and a bare launch with stdin not a terminal (a menu entry, a double-click)
is the viewer; at a terminal it is the usage, as before. The AppImage is
thereby also the command line (`Wanderbooks.AppImage update`).
Test: bare_launch_tests::only_nothing_at_all_with_no_terminal_is_the_viewer
(the launch itself cannot run under test: the viewer finds the account's
real data root from the password database, not from the environment).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HS8WZziDnyxunC23MUxrLp
swaitsandClaude Fable 5.1
4b5f44689d