RC1-011 Allow users to update About section from Edit Profile

[flyblackbox]

RC1-011 Allow users to update About section from Edit Profile

Status

The About/bio implementation landed through #434. Final acceptance testing remains blocked by the separate profile-page navigation/rendering failure tracked in #440.

Completed implementation

• Add an About field to the Edit Profile/settings flow.
• Wire the form value to the user profile update API.
• Add length and plain-text validation.
• Refresh profile state after save.
• Add backend and frontend test coverage for bio validation and profile/settings behavior.

Remaining verification

• Resolve or isolate Profile page navigation error blocks profile acceptance testing #440.
• Log in and open the user’s own profile.
• Update the About text and save.
• Reload the profile and confirm the text persists.
• Confirm the behavior on relevant desktop and mobile layouts.

Acceptance criteria

• The Edit Profile UI includes an editable About field.
• Valid About text saves through the user update API.
• Saved text persists after a successful profile reload.
• Invalid or excessive text is rejected consistently.
• The flow introduces no regression in adjacent profile behavior.

Related work

• Implementation: feat(profile): About bio, settings UX, and updateUser (1/4) #434
• Blocking profile error: Profile page navigation error blocks profile acceptance testing #440

This issue should close after the narrow save-and-persist check succeeds. Any broader profile-navigation defect remains independently visible in #440.