Convert detail and filter sheets to shared helpers, add inline Filter /
Export / Clear buttons next to the search bar (toolbar items weren't
surfacing in the settings detail pane), inline the Reset Filters button
at the bottom of the filter sheet, use a 'Close' text button, and trim
the macOS Share Sheet to just the scrollable log with a Copy button.
Add macOS-only minimum frame sizing to sheets that wrap a
NavigationStack/Form without intrinsic size, so they render properly
instead of collapsing to just the toolbar. Affects Customize Home,
subscription/channel view options, playlist create/edit, search
filters, media browser options, instance picker, log filters, preset
editor, and legacy data import result.
On tvOS, ContentUnavailableView inside a Group doesn't expand to fill
available space — it sizes to content and aligns top-leading. Add
.frame(maxWidth: .infinity, maxHeight: .infinity) to all instances
so they center correctly in their parent containers.
