Mirror the picker dropdown's provider collapse into the Edit Models dialog so
curating is one click per provider instead of scrolling through 30 models.
Each provider header is a full-width clickable label (same style as the
composer context-menu labels) with a DisclosureCaret next to the text and a
select-all Checkbox (indeterminate when partial). Model rows stay Switches.
The dropdown's collapse is fixed too: the current provider is now
collapsible (was forced open), and the label style matches the rest of the app.
Adds a search icon to the dialog input matching every other search field.
Brooklyn Nicholson
9ffb35c3c7