Bugfix/in kiosk minting messaging

[actuallymentor]

Fixes:

• [ ] aspecific error messages in minting
• [ ] edgecase where typing an address when there is one in the url
• [ ] implements @poap/sane-data for validations both front and back

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit edf61db):

https://qr-kiosk-dev--pr154-bugfix-in-kiosk-mint-fnzrgbtw.web.app

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