feat(promote-customer-spec): Phase B — two-picker SO line UX

Spec-side picker (x_fc_customer_spec_id / customer_spec_id) added on:
- sale.order.line (via quality inherit — onchange autofill, create()
  fallback to part default, _prepare_invoice_line carry)
- account.move.line (via quality inherit — invoice rendering)
- fp.part.catalog (via quality inherit — x_fc_default_customer_spec_id)
- fp.direct.order.line (via quality inherit — wizard picker + autofill)
- fp.direct.order.wizard (action_create_order post-creates spec on SO line)

Thickness picker switched to fp.recipe.thickness (replaces coating-scoped):
- sale.order.line.x_fc_thickness_id comodel + domain rewired to recipe
- account.move.line + fp.delivery same
- fp.direct.order.line.thickness_id same

View inherits in quality add Specification picker next to legacy
Primary Treatment column on:
- SO form line tree
- part catalog Default Treatments block
- direct-order wizard line tree + drawer

Wizard files (fp.contract.review.client.email.wizard) pulled from
entech into the repo — they were ahead of the repo. Quality __init__
now imports wizards/.

Legacy x_fc_coating_config_id + treatment_ids remain visible during
transition; Phase E removes them.

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

fusion_plating/fusion_plating_configurator/views/sale_order_views.xml

@@ -264,9 +264,9 @@
                        optional="hide"/>
                 <field name="x_fc_thickness_id"
                        options="{'no_quick_create': True}"
-                       context="{'default_coating_config_id': x_fc_coating_config_id}"
-                       domain="[('coating_config_id', '=', x_fc_coating_config_id)]"
-                       invisible="not x_fc_coating_config_id"
+                       context="{'default_recipe_id': x_fc_process_variant_id}"
+                       domain="[('recipe_id', '=', x_fc_process_variant_id)]"
+                       invisible="not x_fc_process_variant_id"
                        optional="show"/>
                 <field name="x_fc_serial_ids"
                        widget="many2many_tags"
@@ -290,7 +290,7 @@
                 <field name="x_fc_revision_snapshot"
                        readonly="1"
                        optional="hide"/>
-                <field name="x_fc_treatment_ids" widget="many2many_tags" optional="hide"/>
+                <field name="x_fc_treatment_ids" widget="many2many_tags" invisible="1"/>
                 <field name="x_fc_part_deadline" string="Part Deadline Override" optional="hide"/>
                 <field name="x_fc_part_deadline_offset_days" string="Days Offset" optional="hide"/>
                 <field name="x_fc_effective_part_deadline" string="Effective Deadline"