`ProfileEditor` component does not validate form fields on blur

[therealjhay]

File: components/settings/ProfileEditor.tsx

The profile editor likely validates only on form submission. Add validation on blur for each field using react-hook-form's trigger function. Show inline error messages below each field. Disable the submit button until all required fields are valid. Include a dirty-state indicator that shows "Unsaved changes" when the form has been modified.

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Labels: bug