fix: dashboard invoice visibility - filter by originator_id, surface insert errors

[samjay8]

Synced from the invofi monorepo.

Changes

Dashboard (src/app/dashboard/page.tsx)

• The invoice query filtered .eq('originator', user.id) - but originator stores the wallet public key (G...), while user.id is the Supabase auth UUID, so the filter never matched and the dashboard always showed zero invoices. Now filters on originator_id.

InvoiceForm (src/components/invoices/InvoiceForm.tsx)

• The Supabase insert result was ignored - an RLS rejection failed silently while the success toast still showed. Insert errors are now surfaced in the error toast.

Test plan

• Register an invoice while signed in - it appears on the dashboard immediately
• Registered invoices appear in the marketplace (status Pending)