fix: enable word-break for long unbroken strings

[Anil567849]

Summary

Fixes text wrapping issue in Copilot Chat field where long unbroken strings is not breaking to next line correctly.
Now long words wrap correctly, improving readability and layout stability.

Fixes #1210

Type of Change

• [x] Bug fix
• [ ] New feature
• [ ] Breaking change
• [ ] Documentation
• [ ] Other: ___________

Testing

• Typed long unbroken text (e.g., anilanilanilanil...) → wrapped correctly
• Normal sentences with spaces remain unaffected
• Verified on Chrome, Firefox, and Safari

Checklist

• [x] Code follows project style guidelines
• [x] Self-reviewed my changes
• [x] Tests added/updated and passing
• [x] No new warnings introduced
• [x] I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

Screenshots/Videos

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After:

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