feat(configurator): C3 — link direct-order line to a prior quote

Adds quote_id (Many2one fp.quote.configurator) on the wizard line
with a domain scoped to the wizard's customer + quote states (sent /
accepted / won). Onchange auto-fills part, coating, and unit price
(final = estimator_override_price or calculated_price, per-part).

Mirrors x_fc_quote_id on sale.order.line for the audit trail. Surfaced
as a togglable column on the SO line tree and under "Qty & Price" on
the wizard line drill-in form.

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

fusion_plating/fusion_plating_configurator/models/sale_order_line.py

@@ -41,3 +41,8 @@ class SaleOrderLine(models.Model):
         help='Flag for prototype / non-catalog parts that should not be '
              'reused after this order.',
     )
+    x_fc_quote_id = fields.Many2one(
+        'fp.quote.configurator',
+        string='Linked Quote',
+        help='Quote that seeded this line. Links back for audit trail.',
+    )

fusion_plating/fusion_plating_configurator/views/sale_order_views.xml

@@ -103,6 +103,7 @@
                 <field name="x_fc_wo_group_tag" optional="hide"/>
                 <field name="x_fc_start_at_node_id" optional="hide"/>
                 <field name="x_fc_is_one_off" optional="hide"/>
+                <field name="x_fc_quote_id" optional="hide"/>
                 <field name="x_fc_rush_order" optional="hide"/>
             </xpath>
         </field>

fusion_plating/fusion_plating_configurator/wizard/fp_direct_order_line.py

@@ -108,6 +108,13 @@ class FpDirectOrderLine(models.TransientModel):
         help='After submit, write this line\'s coating + additional '
              'treatments back onto the part catalog as its new defaults.',
     )
+    quote_id = fields.Many2one(
+        'fp.quote.configurator',
+        string='Linked Quote',
+        domain="[('partner_id', '=', parent.partner_id), ('state', 'in', ['sent','accepted','won'])]",
+        help='Optional: link this line to a prior quote. The unit price '
+             'auto-fills from the quote\'s final price (or override).',
+    )
 
     # ---- Description ----
     description_template_id = fields.Many2one(
@@ -143,6 +150,21 @@ class FpDirectOrderLine(models.TransientModel):
             )
 
     # ---- Onchange ----
+    @api.onchange('quote_id')
+    def _onchange_quote_id(self):
+        """Auto-fill part, coating, and unit price from the linked quote."""
+        if not self.quote_id:
+            return
+        q = self.quote_id
+        if q.part_catalog_id and not self.part_catalog_id:
+            self.part_catalog_id = q.part_catalog_id
+        if q.coating_config_id and not self.coating_config_id:
+            self.coating_config_id = q.coating_config_id
+        if not self.unit_price:
+            final = q.estimator_override_price or q.calculated_price
+            if final and q.quantity:
+                self.unit_price = final / q.quantity
+
     @api.onchange('part_catalog_id')
     def _onchange_part_defaults(self):
         """When a part is picked, seed coating + treatments from its catalog defaults."""

fusion_plating/fusion_plating_configurator/wizard/fp_direct_order_wizard.py

@@ -246,6 +246,7 @@ class FpDirectOrderWizard(models.TransientModel):
                 'x_fc_part_wo_description': line.part_wo_description or False,
                 'x_fc_start_at_node_id': line.start_at_node_id.id or False,
                 'x_fc_is_one_off': line.is_one_off,
+                'x_fc_quote_id': line.quote_id.id or False,
             }))
 
         # 5. Create + confirm

fusion_plating/fusion_plating_configurator/wizard/fp_direct_order_wizard_views.xml

@@ -118,6 +118,8 @@
                                                    widget="many2many_tags"/>
                                         </group>
                                         <group string="Qty &amp; Price">
+                                            <field name="quote_id"
+                                                   options="{'no_create': True, 'no_open': True}"/>
                                             <field name="quantity"/>
                                             <field name="unit_price"
                                                    widget="monetary"