- Width: drop the header-fits-too floor; popup width is now
max(COLUMN_WIDTH, columns-required, tabs-required). The brand title in
the header is allowed to ellipsize at the 216px minimum (full name
preserved in tray hover and h1 title attr).
- Minimize: new -/▢ button in the header next to pin. Toggling hides the
tab strip + body, locks width at COLUMN_WIDTH, and lets the existing
ResizeObserver collapse height to just the header. State persists in
config.minimized so reopening the popup remembers it. Add-column +
button is hidden while minimized.
- Claude launcher: now spawns powershell.exe -NoExit -Command claude in
the wt new-tab (was cmd.exe /K claude). Cmd-fallback updated to also
start powershell directly when the trailing args target it.