[Bug]: iOS context menu appears when tapping crossword cells

### What happened?

A user reported that when tapping on a crossword cell on iOS, the native iOS context menu (e.g. Paste/Autofill) appears and obstructs the clue display.

This occurs most commonly when tapping a cell a second time (i.e. to switch clue direction) and apparently only began after the new crosswords rolled out.

The issue has been reproduced on iPhone and iPad devices; the context menu appears even when tapping quickly if the cell is already selected as part of both an across and down clue.

**User Details**

Device: iPhone 16 Pro
iOS: 18.4.1
Browser: Safari

Device: iPhone SE2020
iOS: 17.6.1
Browser: Chrome

**Findings by User Help**

- Able to reproduce on iPhone 16 Pro, iOS 18.4.1
- Context menu consistently appears on second tap of a cell, especially when the cell is part of both an across and down clue
- Less reproducible on first tap but one report of this received
- User feedback indicates that quicker taps can avoid the menu but can lead to selecting the wrong clue

A similar issue has also been reproduced on an iPad 6th Gen running iOS 17.7.8. The issue applies to both the website and Editions app.

**Acceptance Criteria**

- Tapping a crossword cell should not trigger the context menu; only long-press should trigger this
- Switching between across and down clues should by tapping a cell should not trigger the context menu
- Behaviour should be consistent across products where the player is used (i.e. the website and Editions app)

### Where is this happening?

Mobile web (Safari and Chrome on iOS) and Editions app (iOS)

### What is the impact?

Limited - the crossword remains usable but repeated pop up of the context menu can obstruct clues and frustrate users, especially when tapping to switch clue direction