Fix mobile score breakdown interaction and tap behavior

[jagdish-15]

On mobile screens, tapping the score breakdown currently causes the score text to briefly get selected/highlighted blue during the click interaction.

Additionally, tapping the score again on mobile does not close the breakdown popup. Users currently have to tap elsewhere on the page to dismiss it.

It would probably provide a cleaner mobile UX if the score breakdown behaved as a proper tap-to-toggle interaction on smaller screens:

• first tap opens the breakdown,
• second tap closes it,
• while also preventing the temporary text-selection highlight during interaction.

[github-actions]

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