RegisterPage step 2 writes the new token to localStorage but defers
initSession (and thus the authStore.token write) until after the avatar
upload, to keep AuthRedirect from yanking the user off /register
mid-upload. The home-origin branch of setTokenForOriginResolver was
reading authStore.token, so getTokenForOrigin('') returned null during
that window — transferStore.startUpload threw "not authenticated" and
the surrounding catch-and-ignore silently dropped the avatar. Align the
resolver with the home api client and read localStorage so both paths
share one source of truth for the home JWT.