changes

fusion_shipping/models/delivery_carrier.py

@@ -2459,13 +2459,29 @@ class DeliveryCarrier(models.Model):
     def fusion_fedex_rest_send_shipping(self, pickings):
         res = []
         srm = FedexRestRequest(self)
+        # Per-shipment service override — fp.receiving sets this on the
+        # carrier via with_context() before calling send_shipping. Empty
+        # falls back to the carrier-level default already on srm.
+        # See CLAUDE.md "Per-shipment service override".
+        override = self.env.context.get('fp_service_type_override')
+        if override:
+            srm.service_type = override
         for picking in pickings:
             packages = self._get_packages_from_picking(picking, self.fedex_rest_default_package_type_id)
+            # SoldTo defaults to the SO's invoice partner, but many setups
+            # leave the parent contact (used as invoice fallback) with a
+            # name-only record and no address — FedEx rejects on `soldTo.
+            # address.city cannot be null`. If the invoice partner has no
+            # city, treat ship-to as sold-to so _ship_package skips the
+            # soldTo block entirely (line guard: `if sold_to != ship_to`).
+            invoice_partner = picking.sale_id.partner_invoice_id
+            if not (invoice_partner and invoice_partner.city):
+                invoice_partner = picking.partner_id
             response = srm._ship_package(
                 ship_from_wh=picking.picking_type_id.warehouse_id.partner_id,
                 ship_from_company=picking.company_id.partner_id,
                 ship_to=picking.partner_id,
-                sold_to=picking.sale_id.partner_invoice_id,
+                sold_to=invoice_partner,
                 packages=packages,
                 currency=picking.sale_id.currency_id.name or picking.company_id.currency_id.name,
                 order_no=picking.sale_id.name,

fusion_shipping/models/fusion_shipment.py

@@ -267,10 +267,22 @@ class FusionShipment(models.Model):
         }
 
     def _action_open_attachment(self, attachment):
-        """Open an attachment PDF in the browser viewer (new tab)."""
+        """Open an attachment for the operator.
+
+        Delegates to ir.attachment.action_fusion_preview — PDFs render
+        in the preview dialog, anything else (ZPL, etc.) downloads.
+        Helper falls back gracefully when fusion_pdf_preview isn't
+        installed. See CLAUDE.md "PDF Preview" for the contract.
+        """
         self.ensure_one()
         if not attachment:
             return False
+        if hasattr(attachment, 'action_fusion_preview'):
+            return attachment.action_fusion_preview(
+                title=attachment.name or 'Shipping Label',
+                model_name=self._name,
+                record_ids=self.id,
+            )
         return {
             'type': 'ir.actions.act_url',
             'url': '/web/content/%s?download=false' % attachment.id,