fix(invoicing): wire emisor config save/load and align fiscal config keys

pos/blueprints/config_bp.py

@@ -759,6 +759,7 @@ def get_business():
         'nombre': cfg.get('tenant_nombre', cfg.get('tenant_razon_social', '')),
         'rfc': cfg.get('tenant_rfc', ''),
         'regimen_fiscal': cfg.get('tenant_regimen_fiscal', ''),
+        'cp': cfg.get('tenant_cp', ''),
         'direccion': cfg.get('tenant_direccion', ''),
         'telefono': cfg.get('tenant_telefono', ''),
         'email': cfg.get('tenant_email', ''),
@@ -775,14 +776,16 @@ def update_business():
         'nombre': 'tenant_nombre',
         'rfc': 'tenant_rfc',
         'regimen_fiscal': 'tenant_regimen_fiscal',
+        'cp': 'tenant_cp',
         'direccion': 'tenant_direccion',
         'telefono': 'tenant_telefono',
         'email': 'tenant_email',
-        # Tax params
+        # Tax params (also keep cfdi_* aliases in sync)
         'tax_iva': 'tax_iva',
         'tax_ieps': 'tax_ieps',
         'invoice_serie': 'invoice_serie',
         'invoice_folio': 'invoice_folio',
+        'cfdi_serie': 'cfdi_serie',
         'default_currency': 'default_currency',
         'default_payment_method': 'default_payment_method',
     }

pos/blueprints/invoicing_bp.py

@@ -43,9 +43,9 @@ def _get_issuer_config(cur, branch_id=None):
     result = {
         "rfc": config.get("tenant_rfc", ""),
         "razon_social": config.get("tenant_razon_social", ""),
-        "regimen_fiscal": config.get("cfdi_regimen_fiscal", "601"),
+        "regimen_fiscal": config.get("cfdi_regimen_fiscal") or config.get("tenant_regimen_fiscal", "601"),
         "cp": config.get("tenant_cp", "00000"),
-        "serie": config.get("cfdi_serie", "A"),
+        "serie": config.get("cfdi_serie") or config.get("invoice_serie", "A"),
         "facturapi_key": config.get("cfdi_facturapi_key", ""),
         "facturapi_org_id": config.get("cfdi_facturapi_org_id", ""),
     }