Phone: long press on a poster to add it without opening the work

On a phone, long-pressing a poster outside the library (home, search, similar titles) opens a sheet to add the work to the library or to a list, without opening its page.

Why

Adding something seen in passing currently means opening the page, adding it, then coming back.

Notes

• Reuse the longpress action and the same sheet look as lists, comments and messages.
• The library keeps its own long press, which starts a selection.
• A plain tap still opens the work, and scrolling must not trigger the press.