Fix/supp ag fb (#1023)

* fix: prevent credit notes from entering payment flow

* fix: persist and display customer personal numbers

* feat: configure automatic invoice reminder days

* fix: issue credit notes through send flow

* chore: add repository agent guidance

* feat(mcp): route tools across user companies

* fix(articles): delete unused register entries

* feat(invoices): improve issued invoice actions

* feat(supplier-invoices): retain uploaded source documents

* docs: record implementation decisions

* feat: enhance customer personal number handling and validation

- Updated CustomerForm to allow personal numbers in the format of "********-1234" for individual customers.
- Added validation to ensure personal numbers are only accepted for individual customers in CreateCustomerSchema.
- Implemented masking and encryption for personal numbers to enhance data protection.
- Introduced new utility functions for masking and encrypting personal numbers.
- Added database migration to enforce unique constraints on credit note relationships and prevent duplicate entries.
- Enhanced error handling and logging for credit note issuance and invoice processing.
- Updated tests to cover new credit note creation guards and personal number handling.

* test: enhance list companies test with supabase query mocks

components/transactions/InvoicePicker.tsx

@@ -48,6 +48,7 @@ export default function InvoicePicker({ transaction, onSelect, isProcessing }: I
         .select('*, customer:customers(*)')
         .eq('company_id', companyId)
         .eq('document_type', 'invoice')
+        .is('credited_invoice_id', null)
         .in('status', ['sent', 'overdue', 'partially_paid'])
         .gt('remaining_amount', 0)
         .order('invoice_date', { ascending: false })

components/transactions/MatchAllocationDialog.tsx

@@ -112,6 +112,7 @@ export default function MatchAllocationDialog({
             .select('*, customer:customers(id, name)')
             .eq('company_id', companyId)
             .eq('document_type', 'invoice')
+            .is('credited_invoice_id', null)
             .in('status', ['sent', 'overdue', 'partially_paid'])
             .gt('remaining_amount', 0)
             .order('due_date', { ascending: true })