feat(numbering): surface quote ref under SO name on the form

A small grey 'Originally quoted as Q202605-200' line appears below
the SO heading once the order is confirmed. Uses invisible= on the
wrapper div (Odoo 19 forbids t-if in standard form views).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating_jobs/__manifest__.py

@@ -3,7 +3,7 @@
 # License OPL-1 (Odoo Proprietary License v1.0)
 {
     'name': 'Fusion Plating — Native Jobs',
-    'version': '19.0.8.22.5',
+    'version': '19.0.8.22.6',
     'category': 'Manufacturing/Plating',
     'summary': 'Native plating job model — replaces mrp.production / mrp.workorder bridge.',
     'author': 'Nexa Systems Inc.',

fusion_plating/fusion_plating_jobs/views/sale_order_views.xml

@@ -32,6 +32,25 @@
                            string="Certificates"/>
                 </button>
             </xpath>
+
+            <!-- Quote ref: small grey "Originally quoted as Q202605-200"
+                 line under the SO name (the big SO-30000 heading). Only
+                 renders once the SO has been confirmed (quote_ref is set
+                 on create, parent_number is set on confirm — both
+                 needed for the line to make sense).
+                 NB: Odoo 19 forbids t-if in standard form views — using
+                 `invisible` attribute on the wrapper div instead. -->
+            <xpath expr="//div[hasclass('oe_title')]" position="inside">
+                <field name="x_fc_parent_number" invisible="1"/>
+                <div class="text-muted"
+                     style="font-size: 0.9em; margin-top: 4px;"
+                     invisible="not x_fc_quote_ref or not x_fc_parent_number">
+                    Originally quoted as
+                    <field name="x_fc_quote_ref"
+                           readonly="1" nolabel="1"
+                           class="d-inline"/>
+                </div>
+            </xpath>
         </field>
     </record>