* feat: show a zoom indicator in the desktop tab bar
Reserve the right edge of the tab row for a ZOOM pill while the
focused pane is zoomed, matching the accent style of the mode bars.
The per-tab Z suffix stays; the pill makes the zoomed state visible
at a glance like tmux's status-right flag.
* feat: optionally show the hostname in the desktop tab bar
Add ui.tab_bar_hostname to display the machine's hostname at the right
edge of the tab row, like tmux's #h in status-right. The value resolves
where the server renders, so remote sessions show the remote host. Off
by default.
* fix: strip control characters from the tab bar hostname
* fix: hide the hostname when it would squeeze out the tab strip
* feat: add configurable tab bar status
* fix: harden tab bar status updates
* fix: terminate tab bar status process trees
* fix: disable status commands on unsupported platforms
* fix: skip unchanged status command renders
* fix: keep tab bar status opt-in by default
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Co-authored-by: David Heinemeier Hansson <david@hey.com>
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