Fixed
- Split expenses: adding a family member as a group guest restricted their navigation to the Split page only: when an existing user was added to an expense group with the
guestrole via the members endpoint, they were incorrectly written into thesplit_expense_guest_userstable. This causedaccess_scopeto be resolved assplit_gueston their next login, hiding all navigation items except Budget/Split. Thesplit_expense_guest_userstable is now exclusively populated by the dedicated guest-account creation flow. A database migration removes existing incorrect entries for users who have noguest_createdactivity record. (Fixes #400)