feat(configurator): auto-load latest part description version on order entry

Wizard line (direct + express) and SO line now pre-fill BOTH internal +
customer-facing from the part's latest version (fallback to
default_specification_text), without clobbering typed text.

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

fusion_plating/fusion_plating_configurator/models/sale_order_line.py

@@ -42,6 +42,20 @@ class SaleOrderLine(models.Model):
                 return tail.lstrip(' \t\r\n-—–:').strip()
         return name
 
+    @api.onchange('x_fc_part_catalog_id')
+    def _fp_onchange_part_load_description(self):
+        """Pre-fill name (customer-facing) + x_fc_internal_description from
+        the part's latest description version, when empty (spec 2026-05-29)."""
+        for line in self:
+            part = line.x_fc_part_catalog_id
+            if not part:
+                continue
+            descs = part._fp_resolve_line_descriptions()
+            if not line.name and descs['customer_facing']:
+                line.name = descs['customer_facing']
+            if not line.x_fc_internal_description and descs['internal']:
+                line.x_fc_internal_description = descs['internal']
+
     x_fc_part_catalog_id = fields.Many2one(
         'fp.part.catalog', string='Part',
     )

fusion_plating/fusion_plating_configurator/tests/test_part_description_history.py

@@ -72,3 +72,13 @@ class TestPartDescriptionHistory(TransactionCase):
             [('part_catalog_id', '=', self.part.id)])
         self.assertEqual(len(versions), 2)
         self.assertEqual(self.part.default_specification_text, 'c2')
+
+    # ----- Task 5: SO line auto-load -----
+    def test_so_line_onchange_loads_latest_version(self):
+        self.part._fp_save_description_version('shop notes', 'cust spec')
+        line = self.env['sale.order.line'].new({
+            'x_fc_part_catalog_id': self.part.id,
+        })
+        line._fp_onchange_part_load_description()
+        self.assertEqual(line.name, 'cust spec')
+        self.assertEqual(line.x_fc_internal_description, 'shop notes')

fusion_plating/fusion_plating_configurator/wizard/fp_direct_order_line.py

@@ -629,12 +629,16 @@ class FpDirectOrderLine(models.Model):
                     if bake_default:
                         rec.bake_instructions = bake_default
 
-            # ---- Express line_description (Specification) ----
+            # ---- Description history auto-load (spec 2026-05-29) ----
-            # Only seed if currently empty (don't clobber operator-typed text).
+            # Latest per-part version wins; _fp_resolve_line_descriptions
-            if not rec.line_description:
+            # falls back to default_specification_text (customer-facing only)
-                spec_default = getattr(part, 'default_specification_text', None)
+            # for parts with no version yet. Loads BOTH fields; never
-                if spec_default:
+            # clobbers text the operator already typed.
-                    rec.line_description = spec_default
+            descs = part._fp_resolve_line_descriptions()
+            if not rec.line_description and descs['customer_facing']:
+                rec.line_description = descs['customer_facing']
+            if not rec.internal_description and descs['internal']:
+                rec.internal_description = descs['internal']
 
             # ---- Express masking_enabled (always re-seed from part default) ----
             # Boolean has no "empty" state; explicit reseed on every part-change