feat(configurator): Phase D batch 1 — countdown, notes split, margin, contact

Phase D first landing covers the quick-win Steelhead-parity fields on
the SO form / list:

- D1: x_fc_deadline_countdown ("in 2d 3h", "overdue 1d 4h") computed
  from commitment_date. Surfaced in SO form scheduling group and as
  togglable column on the SO list.
- D4: x_fc_internal_note + x_fc_external_note split (html). Existing
  'note' field is left untouched for back-compat. External note is
  intended for the SO acknowledgement + portal; internal note is
  shop-floor only.
- D8: x_fc_margin_amount + x_fc_margin_percent, currently computed
  against fp.coating.config.unit_cost if defined (else 0 -> 100%
  margin). When cost rollup lands on fp.coating.config, margin will
  reflect reality automatically.
- D12: x_fc_contact_phone related to partner.phone (readonly) on SO
  header.
- D13: x_fc_ship_via Char on SO header (carrier name).

Smoke: S00066 shows 'in 9d 22h' countdown + \$3025 margin; S00069
shows 'in 24d 22h' + \$750. Contact phone pulls from partner.

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

fusion_plating/fusion_plating_configurator/views/sale_order_views.xml

@@ -84,15 +84,37 @@
                     <group>
                         <group string="Customer Reference">
                             <field name="x_fc_customer_job_number"/>
+                            <field name="x_fc_contact_phone"/>
+                            <field name="x_fc_ship_via"/>
                         </group>
                         <group string="Scheduling">
                             <field name="x_fc_planned_start_date"/>
                             <field name="x_fc_internal_deadline"/>
                             <field name="commitment_date" string="Customer Deadline"/>
+                            <field name="x_fc_deadline_countdown" readonly="1"/>
                             <field name="x_fc_is_blanket_order"/>
                             <field name="x_fc_block_partial_shipments"/>
                         </group>
                     </group>
+                    <group>
+                        <group string="Margin">
+                            <field name="x_fc_margin_amount"
+                                   widget="monetary"
+                                   options="{'currency_field': 'currency_id'}"/>
+                            <field name="x_fc_margin_percent"
+                                   widget="percentage"/>
+                        </group>
+                    </group>
+                    <group>
+                        <group string="Internal Notes">
+                            <field name="x_fc_internal_note" nolabel="1"
+                                   placeholder="Internal notes for estimator / planner / shop floor..."/>
+                        </group>
+                        <group string="External Notes (customer-visible)">
+                            <field name="x_fc_external_note" nolabel="1"
+                                   placeholder="Notes that appear on the acknowledgement and portal..."/>
+                        </group>
+                    </group>
                 </page>
             </xpath>
             <xpath expr="//field[@name='order_line']/list/field[@name='product_uom_qty']" position="before">
@@ -122,6 +144,7 @@
                 <field name="x_fc_customer_job_number" optional="show"/>
                 <field name="x_fc_internal_deadline" optional="show"/>
                 <field name="commitment_date" string="Customer Deadline" optional="show"/>
+                <field name="x_fc_deadline_countdown" optional="show"/>
                 <field name="x_fc_planned_start_date" optional="hide"/>
                 <field name="x_fc_part_catalog_id" optional="hide"/>
                 <field name="x_fc_coating_config_id" optional="hide"/>