US-3.1 —As a returning user, I want to sign in to my existing Hypermedia identity from the browser avatar icon so and join the site.

Acceptance Criteria

Avatar icon is outlined when the user is not signed in

Tapping the avatar opens a modal with three options: "Create my identity" and "Sign in — I already have an identity" or I have an identity from another site

Tapping "Sign in — I already have an identity" leads to the passkey screen

Passkey screen shows "Good to see you again", the email, and a "Sign in with passkey" button

"Use another email" option is available on the passkey screen

After passkey confirmation, if the user has more than one account, a "Connect your account" screen appears

The "Connect your account" screen lists all available accounts with one pre-selected.

User can change the selected account and tap "Confirm account" to proceed

If the user has only one account, this screen is skipped

Avatar updates to show the user's profile photo after sign-in

If already a member, Join button disappears and a toast confirms access

If not yet a member, Join button remains until tapped

Basic Flow

Tap avatar → account option appears

Sign in → Screen confirmation appears with "Good to see you again"

Confirm passkey → signed in, account options appears if user has more than one

Already a member → Join button disappears, toast appears

Not a member → Join button stays, user taps it to enrol

Edge Cases

User taps "Use another email" → email input appears → enters new email → returns to passkey screen

User enters an email not linked to any identity → Create new account flow prompt

User cancels or fails passkey → error shown, option to retry

Account list is empty → only "Create my identity" option is shown

User is already signed in → avatar shows photo, no sign-in flow triggered but list options (account settings, profile....)

Network error during sign-in → error message shown with option to retry

US-3.3.—As a returning user I want to create a new account in the browser by tapping the avatar