Wide characters shifted everything after them one column to the right:
- render.rs: vt100's empty wide-continuation cell was padded to a
space, making wide chars occupy 2+1 columns — skip it entirely
- ipc.rs buffer_to_ansi: same bug for daemon frames — skip cells
covered by a preceding wide symbol (unicode-width)
- app.rs: clamp virtual terminals to >= 2 columns (vt100 0.16 has a
subtraction underflow panic on wide chars in a 1-col grid) and give
content_area a sane 80x24 default so windows spawned before the
first layout pass aren't degenerate
- main.rs: use try_send for display frames so one slow/stalled client
can no longer freeze the whole WM
- integration test: new end-to-end check that emoji do not shift the
row, plus fix a false match against the window title
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Bjorn Blomberg
6aee7ce00a