💄Bouton new doc to adapt

[AntoLC]

Bug Report

Depend the language the button does not look nice.

[veerababu1729]

Just now Iresolved this issue,check : #1507

Proposal

• Add CSS rule targeting [data-testid="new-doc-button"] to prevent text wrapping
• Apply white-space: nowrap !important to keep text on single line
• Add min-width: fit-content !important to allow button to expand for longer text
• Ensure fix works for all language translations (tested with longest ones: Spanish/Italian "Nuevo documento"/"Nuovo documento")
• Update CHANGELOG.md with fix entry