The fused combo-plus-pencil was three controls squeezed into a wrapper, and hover gave the
trick away (each kept its own radius and hover fill; the pencil clipped). The honest
verdict: WinUI can build a real input group — CornerRadius is per-corner on every control —
but windows-reactor exposes only a uniform radius on Border, so the fake was never going
to hold. The native answer was next to it all along: the switcher is now ONE
DropDownButton — its label is the scope in play, its menu holds Default settings, the
profiles, "New profile…" and "Edit …" — with one hover state and no seams, and the pencil
folded into the menu. Retired with the ComboBox: the items/selected_index remount hazard
(a button label is one plain prop) and the scope-sentinel id.
UIA-verified: menu -> Work applies the scope (the section repaints, markers included),
menu -> Edit opens the sheet, Close closes it.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
enricobuehlerandClaude Fable 5
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