Two regressions from the cleanup: 1. Bottom bar vanishing when bufferline's tabline appears. Tabline toggle fires WinResized but not VimResized; my cleanup left WinResized doing only redraw!, no bar-recovery, so once a bar was nuked by a grid-shrink it stayed dead. WinResized handler now does a cheap O(1) "are both bars valid?" check and only runs recovery when one's missing. Common case = 1 nil check + redraw, no extra work. Uncommon case = recreate the nuked bar. 2. "Wrong color border below top bar" — that was the per-window StatusLine row (laststatus=2 gives every window a statusline) rendering in its default dark StatusLine highlight. My winhighlight only mapped Normal + EndOfBuffer, leaving StatusLine untouched. Added StatusLine:TurboDebugBar and StatusLineNC:TurboDebugBar so any statusline row on a bar window blends into the bar's Normal bg. Also set `statusline = " "` on bar windows so it renders as empty (no "[No Name]" default). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>