Add multi-vendor capability with admin vendor management
- Add resolveVendorId() helper — admin can pass ?vendorId= to scope
catalog operations to any vendor; other roles locked to JWT vendorId
- Thread ?vendorId= through products, categories, taxes, events routes
- Add DELETE /vendors/:id (admin only) with cascade-safe guard:
blocks if vendor has users or transactions; otherwise cascade-deletes
EventProduct → EventTax → Event → Product → Tax → Category → Vendor
- Rewrite VendorPage: admin gets full CRUD list, vendor gets own settings
- Add VendorFilter shared component (admin-only dropdown)
- Integrate VendorFilter into Catalog, Users, and Events pages so admin
can switch vendor context for all create/read operations
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
jason
e1b1a82e07