FitAddon's proposeDimensions() always subtracts a phantom scrollbar width even
when CSS hides the scrollbar — losing one column of usable width. fitFull()
divides host clientWidth/clientHeight by the renderer's reported cell size
directly. Also POSTs the resized cols/rows back to /api/term/.../resize on
initial mount and after fonts.ready so bash/opencode get the correct PTY
size before the user types.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
indifferentketchup
3fceea064a