Add partner name display in POS receipt header

- Patch PosOrder.export_for_printing() to include partner data in headerData
- Update receipt header template to display partner name above tracking number
- Partner name shown only when partner is selected for the order

open_workshop_pos/static/src/js/ows_receipt_header_patch.js

@@ -0,0 +1,19 @@
+/** @odoo-module */
+
+import { PosOrder } from "@point_of_sale/app/models/pos_order";
+import { patch } from "@web/core/utils/patch";
+
+// Patch the export_for_printing method to include partner data
+patch(PosOrder.prototype, {
+    export_for_printing(baseUrl, headerData) {
+        const result = super.export_for_printing(baseUrl, headerData);
+        
+        // Add partner name to headerData if partner exists
+        const partner = this.get_partner();
+        if (partner && result.headerData) {
+            result.headerData.partnerName = partner.name;
+        }
+        
+        return result;
+    }
+});

open_workshop_pos/static/src/xml/ows_receipt_header_patch.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<templates id="template" xml:space="preserve">
+    <!-- Add partner name to tracking number in receipt header -->
+    <t t-name="point_of_sale.ReceiptHeader" t-inherit="point_of_sale.ReceiptHeader" t-inherit-mode="extension">
+        <!-- Add partner name above the big tracking number -->
+        <xpath expr="//h1[hasclass('tracking-number')][hasclass('text-center')]" position="before">
+            <div t-if="props.data.partnerName" 
+                 class="partner-name text-center fw-bold" 
+                 style="font-size: 48px; margin-bottom: 10px;">
+                <t t-esc="props.data.partnerName" />
+            </div>
+        </xpath>
+    </t>
+</templates>