WinForms docks child controls in the REVERSE of their Controls.Add()
order - the last control added gets docked first (claims its edge
space first), and earlier-added controls lay out against whatever
remains. pnlTemplateButtons (Dock=Top) was added before lstTemplates
(Dock=Fill), so Fill was processed first against the full, unclaimed
panel area and expanded to cover the whole thing - overlapping the
button strip instead of leaving room for it. Swapped the add order
(Fill first, Top second) so the button strip actually carves out its
band before Fill claims what's left.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
