fix: legal vote error handling

Ghost Userrequested to merge
(removed):2227-fix-voting-error-handling into main

Introduces translations for legal vote errors.
Changes some of the other error cases (automod/meeting notes) according to backend docs.

We will want to do #2251 as a follow-up to ensure we have all the errors covered with proper notifications.

Closes #2227

Edited by Ghost User

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