Hotfix release of the 0.5 line. v0.5.0 was tagged but never published
to PyPI — two tests broke under CI (the --version test hard-coded the
old version string, the --clean help test assumed ANSI-free Typer
output). Both fixed in prior commits on main; 0.5.1 is the first
0.5.x to actually ship.

Contents are otherwise identical to 0.5.0: shared canvas, live
terminals, workflow catalog v1, session persistence.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>