tvOS's sidebarAdaptable TabView leaves the previously-pushed detail view
visible after the user picks another sidebar item, until they manually
press Menu. Broadcast a notification on tab change so any pushed
TVSidebarDetailContainer dismisses itself, and reset each tab's
NavigationPath. Also drop a redundant inner NavigationStack in the tvOS
SettingsView so subpages register on the tab's outer stack.
TVSidebarDetailContainer now exposes a showsDismissButton flag instead of
always attaching a Done toolbar item. The button is only enabled where a
view can end up with no focusable element on its own — Device
Capabilities (informational rows) and the Import Playlists/Subscriptions
flows.
Wrap Contributors, Translators, Acknowledgements, and Device Capabilities
destinations in TVSidebarDetailContainer for the consistent sidebar look,
and make the Translators/Acknowledgements rows focusable on tvOS by
wrapping them in Buttons so the Menu remote button can pop the stack.
When all playlists/subscriptions were imported, every row collapsed to a
non-focusable checkmark and the Add All toolbar item disappeared, leaving
the view with no focusable element. The Menu button then closed the app
instead of popping the navigation stack.
Wrap the import destinations in TVSidebarDetailContainer for visual
consistency and add a Done toolbar item (cancellationAction) that is
always present on tvOS, reachable from any list row via swipe-up.
Give TVSidebarDetailContainer an optional bottom action slot and use it to
show the Add Source button beside the sources list on tvOS. Switch the
Settings > Sources list from a focus-capturing List to the same
ScrollView+LazyVStack layout MediaSourcesView already uses, drop
.buttonStyle(.card) so row icons no longer clip, and bump the row
icon-to-title spacing to 24pt. Replace the sheet-based Add/Edit flow in
MediaSourcesView with navigationDestinations wrapped in the sidebar
container, and decorate each Add Source form (WebDAV, SMB, remote server,
PeerTube browse) with its own sidebar icon and title.
