Function
Overrides the profile storage adapter; tests inject a stub
Edits are drafts until Save: the card follows every keystroke and every pick, and storage only changes when the learner commits from ProfileSaveBar, which exists only while there is something to save.
On a wide screen the card column stays in view while the sections scroll, so the live preview is beside whatever is being edited, and the save bar sits in that column under the card. On a narrow screen the card comes first and the bar docks to the bottom of the viewport.
The page's h1 is its localized title, not the learner's name: the name
already reads on the card and in the field, and a heading that repeated it
would be the third copy on one screen.
The page edits an existing card, so a device without one is sent to the onboarding to make it.
The Profile page: the learner's card and progress in a column of their own, beside the sections that edit the card, hold the sign-in and security settings, set the preferences, and delete the account.