tenx 0.27.1 — fix red CI: re-pin the --no-focus check

Patch release. No runtime behavior change.

v0.27.0 shipped with red CI on Python 3.10/3.12/3.13. The SPC-035
--no-focus smoke check asked for --visual with multiplexer
auto-detection and expected success — which only held on a machine that
already had a multiplexer. That is precisely the silent headless downgrade
0.27.0 removed, so the old expectation was not preserved: the check now pins
what --no-focus actually controls, the projection plan, plus its
--focus counterpart.

Verified both smoke modes (module and clean install) with HERDR_ENV and
TMUX unset to reproduce the clean-runner environment, and again inside
Herdr. CI green on 3.10, 3.12, 3.13.

Upgrade from 0.27.0 with tenx update.