fix(ui): Enter on a selectable title opens it even with its words selected

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.

frontend/src/components/plexCards.dom.test.tsx

@@ -306,10 +306,10 @@ describe("a Plex card's title stays selectable", () => {
     range.selectNodeContents(title);
     window.getSelection()!.removeAllRanges();
     window.getSelection()!.addRange(range);
-    fireEvent.click(title);
+    fireEvent.click(title, { detail: 1 });
     expect(onOpen).not.toHaveBeenCalled();
     window.getSelection()!.removeAllRanges();
-    fireEvent.click(title);
+    fireEvent.click(title, { detail: 1 });
     expect(onOpen).toHaveBeenCalledTimes(1);
   });
 });