Matching Exec to the real binary path wasn't enough: Telegram also compares
the installed .desktop's DBusActivatable field against what it expects and
still self-installs a shadow copy in ~/.local/share/applications when it
sees DBusActivatable=false, producing the same duplicate-icon symptom.
Setting it to true stops the shadow copy. Bumped release and checksum.
Telegram's own Linux runtime checks whether the installed .desktop file's
Exec matches its actual binary path, and silently writes a private copy to
~/.local/share/applications with a randomized name whenever it doesn't.
Our desktop entry pointed at the /usr/bin/telegram-desktop symlink, which
never matched /opt/telegram-desktop/Telegram, so Telegram regenerated a
shadow launcher on every start, producing a second, unmatched icon.
Exec/TryExec now point directly at the installed binary so Telegram's own
check finds a match. Bumped release and updated the checksum for the
changed desktop file.
Repackages the official static tsetup.7.0.5.tar.xz Linux build for
amd64, keeping the upstream org.telegram.desktop desktop-id and
TelegramDesktop WM class.
Александр