The merchant team page was read-only. Now merchant owners can invite,
edit roles, and remove team members across all their stores from a
single hub view.
Architecture: No new models — delegates to existing store_team_service.
Members are deduplicated across stores with per-store role badges.
New:
- 5 API endpoints: GET team (member-centric), GET store roles, POST
invite (multi-store), PUT update role, DELETE remove member
- merchant-team.js Alpine component with invite/edit/remove modals
- Full CRUD template with stats cards, store filter, member table
- 7 Pydantic schemas for merchant team request/response
- 2 service methods: validate_store_ownership, get_merchant_team_members
- 25 new i18n keys across 4 tenancy locales + 1 core common key
Tests: 434 tenancy tests passing, arch-check green.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>