Tentativa de capturar scroll via mini janela sempre-no-topo.
Inclui: MoveWindow/GetMonitorWorkArea via Win32, park consistente
em wx+150/wy+50, ShowCursor loop no goroutine pós-resize.
Revertível: git checkout HEAD~1
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>