Tailwind classes auto completion accept result in broken replace

[smitbarmase]

Summary

When auto-completing Tailwind CSS classes, it doesn't overwrite existing classes if the cursor is in the middle of completion. This is important in cases like changing font size or color, etc., which is common in Tailwind.

https://github.com/user-attachments/assets/49c17f71-d8c6-4abb-9a49-9b434d4cd570