v0.1.2

Added

• First-run setup wizard at /setup for fresh self-hosted deployments.
  When the SPA detects zero users on the instance it routes the visitor to
  a one-page form that collects the family name, timezone, admin name,
  email and password — creates the four rows that a working instance
  needs (Family + admin User + linked FamilyMember + local credential) in
  a single transaction, then auto-logs the admin in so they land on the
  dashboard without a second password prompt. Anonymous, one-shot,
  refuses with 409 the moment any user already exists. Removes the
  previous catch-22 where bootstrapping required either an OIDC provider
  configured upfront or a manual SQL insert. (#20)