feat(configurator): wizard charge_type_id + charge_amount + order-level tax_id

fusion_plating/fusion_plating_configurator/wizard/fp_direct_order_wizard.py

@@ -316,6 +316,25 @@ class FpDirectOrderWizard(models.Model):
              'Carried to the SO and appears as a separate line on the '
              'customer invoice.',
     )
+    charge_type_id = fields.Many2one(
+        'fp.additional.charge.type', string='Additional Charge',
+    )
+    charge_amount = fields.Monetary(
+        string='Charge Amount', currency_field='currency_id',
+    )
+    tax_id = fields.Many2one(
+        'account.tax', string='Tax',
+        domain="[('type_tax_use', '=', 'sale')]",
+        default=lambda self: self.env.company.account_sale_tax_id,
+        help='One tax applied to (subtotal + additional charge). Every '
+             'line + the charge line gets this tax on the created order.',
+    )
+
+    @api.onchange('charge_type_id')
+    def _onchange_charge_type_id(self):
+        for rec in self:
+            if rec.charge_type_id and not rec.charge_amount:
+                rec.charge_amount = rec.charge_type_id.default_amount
 
     # ---- PO status pill (computed, display-only) ----
     po_status = fields.Selection(