endsTextSelection takes the click event and exempts a keyboard click (detail 0): Enter / Space
ends no selection, so a title selected and then tabbed to opened nothing. All three callers
(FocusSafeButton, the Plex caption, the video card title) go through it.
A button whose text is a title or a name is now `selectable` (FocusSafeButton,
under Pressable and Button): Chrome selects inside a button once it is
user-select: text (measured), and the click that ends a selection, or a press
dragged past the slop, opens nothing. 23 surfaces carry it (cards, rows, people,
channels, playlists, users, views, messages, log lines, description links); the
Plex caption div gets the same guard. A contract test pins every plain Pressable
with its reason, so a new one has to choose.
peter