feat(configurator): SO-create applies one tax to all lines + typed charge line

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

fusion_plating/fusion_plating_configurator/models/sale_order_line.py

@@ -326,6 +326,9 @@ class SaleOrderLine(models.Model):
              'pair, falling back to the part\'s default range. Prints '
              'verbatim on the cert, packing slip, and invoice.',
     )
+    x_fc_is_lot_priced = fields.Boolean(string='Lot Priced')
+    x_fc_lot_total = fields.Monetary(
+        string='Lot Total', currency_field='currency_id')
 
     # ---- Express Orders per-line flags (2026-05-26) ----
     # Mirror fp.direct.order.line.{customer_line_ref, masking_enabled, bake_instructions}

fusion_plating/fusion_plating_configurator/wizard/fp_direct_order_wizard.py

@@ -813,7 +813,7 @@ class FpDirectOrderWizard(models.Model):
             'x_fc_internal_notes': self.internal_notes or False,
             # material_process is a Many2One since 19.0.22.1.0 — pass .id
             'x_fc_material_process': self.material_process.id if self.material_process else False,
-            'x_fc_tooling_charge': self.tooling_charge or 0.0,
+            'x_fc_tooling_charge': self.charge_amount or self.tooling_charge or 0.0,
             'pricelist_id': self.pricelist_id.id if self.pricelist_id else False,
             'validity_date': self.validity_date or False,
             'order_line': [],
@@ -895,32 +895,29 @@ class FpDirectOrderWizard(models.Model):
                 # When blank, Odoo will compute taxes from the product
                 # defaults at SO-line save time (the standard behaviour).
                 # NB. Odoo 19 renamed the SO line field to tax_ids.
-                'tax_ids': ([(6, 0, line.tax_ids.ids)]
-                            if line.tax_ids else False),
+                'tax_ids': ([(6, 0, self.tax_id.ids)]
+                            if self.tax_id else False),
+                'x_fc_is_lot_priced': line.is_lot_priced,
+                'x_fc_lot_total': line.lot_total or 0.0,
             }))
 
-        # 4b. Tooling charge — surface as a real sale.order.line so it
-        # carries through SO.amount_total + invoice naturally, instead of
-        # sitting orphaned on the SO header. Tax: inherit from the first
-        # part line that has taxes set (best proxy for "the customer's
-        # standard tax rate"); falls back to product defaults if no line
-        # has taxes yet.
-        if self.tooling_charge:
-            tooling_taxes = False
-            first_taxed = next(
-                (l for l in self.line_ids if l.tax_ids), False,
-            )
-            if first_taxed:
-                tooling_taxes = [(6, 0, first_taxed.tax_ids.ids)]
+        # 4b. Additional charge — one typed line, taxed by the order-level
+        # tax. The charge type's name labels the line; charge_amount with
+        # legacy tooling_charge fallback for in-flight drafts.
+        charge_amt = self.charge_amount or self.tooling_charge or 0.0
+        if charge_amt:
+            charge_name = (self.charge_type_id.name
+                           if self.charge_type_id else _('Additional Charge'))
             so_vals['order_line'].append((0, 0, {
                 'product_id': product.id,
-                'name': _('Tooling Charge'),
+                'name': charge_name,
                 'product_uom_qty': 1.0,
-                'price_unit': self.tooling_charge,
+                'price_unit': charge_amt,
                 'x_fc_internal_description': _(
-                    'One-time tooling fee added via Express Orders.'
+                    'Additional charge added via Express Orders.'
                 ),
-                'tax_ids': tooling_taxes,
+                'tax_ids': ([(6, 0, self.tax_id.ids)]
+                            if self.tax_id else False),
             }))
 
         # 5. Create — stays in draft / quotation. Sub 1: user reviews