feat(state): cap name lengths on peer-supplied mutations (closes #189)#367
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Reject CreateChannel/RenameChannel/RenameServer when name >100 chars and SetProfile when display_name >64 chars. Counts UTF-8 chars, not bytes, so multi-byte graphemes aren't bypassed by .len() comparisons. Closes #189
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Reject
CreateChannel/RenameChannel/RenameServerwhen name exceeds 100 chars, andSetProfilewhen display_name exceeds 64 chars. Uses.chars().count()so multi-byte graphemes aren't bypassed by byte-length comparisons. Adds a UTF-8 awareness test using crab emoji.Closes #189
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