Bio validation incorrectly counts leading/trailing spaces toward max length

Description:

Bio length validation currently counts leading and trailing spaces toward the maximum limit (260 characters), even though the trimmed value is ultimately stored.

This creates inconsistent behavior where a bio that is valid after trimming (e.g., 260 characters of actual content with extra spaces around it) is rejected by the frontend or backend validation.

The validation logic should consistently use the trimmed value when checking length to match the stored value and avoid unexpected rejections.

Steps to reproduce:

1. Go to Profile → Edit Profile.
2. In the Bio field, enter:
   • 260 characters of actual text.
   • Add multiple spaces at the beginning and/or end.
3. Click Save.

Current Behavior

The form rejects the input with:

Expected behavior:

Validation should consider the trimmed value.
If the trimmed bio is 260 characters or fewer, it should be accepted and saved successfully.

Start with the Profile → Edit Profile flow and trace the Bio validation in both the frontend and backend. Reproduce the case with 260 characters surrounded by spaces, then verify that a trimmed value of 260 characters or fewer is accepted and saved successfully.