**The multi-tenancy migration is functionally complete and successful.** The backend has been refactored to a robust, household-scoped system with JWT-based authentication. The legacy `persons` model has been purged, and data isolation is enforced.
- **Objective**: Modify the invitation creation logic to support a "copy link" UX on the frontend, instead of sending an email.
- **File**: `api/households.py`
- **Action**: The existing `POST /api/v1/households/{householdSlug}/invitations` endpoint should be modified. Instead of returning a simple `201 Created`, it must create the invitation token and return a JSON object containing the full, shareable URL.