feat(configurator): OWL widgets + Express form polish to match mockup

NEW OWL widgets:
- FpExpressPartCell (static/src/js/express_part_cell.js + .xml) — multi-row
  Part cell. Wraps Many2OneField for the part picker (row 1: part# / rev,
  bold). Below it: row 2 part description (italic muted), row 3 serial #s
  joined + '+ bulk' button that triggers the existing bulk-add wizard.
- FpExpressBakePill (static/src/js/express_bake_pill.js + .xml) — click-
  to-edit Bake pill. Renders amber pill when set, italic muted 'no bake'
  when empty. Click swaps to inline textarea + Save / Clear / Cancel.

NEW fields:
- fp.direct.order.line.part_number_display / part_revision_display /
  part_name_display (related Char from fp.part.catalog) — fed to the
  Part cell widget so it can render multi-row without RPC.
- fp.direct.order.wizard.tooling_charge (Monetary) — surfaced in the
  Totals card on the Express form.
- fp.direct.order.wizard.po_status (computed Selection
  received/pending/missing) — drives the PO Block status badge.
- sale.order.x_fc_tooling_charge (Monetary) — receives wizard.tooling_charge
  at confirm.

View updates (fp_express_order_views.xml):
- PO block header now shows the PO status pill (green Received,
  amber Pending, red Missing)
- Order Lines legend bar (Mask / Bake pill / DWG / OPEN explainers)
- Part Number column uses widget='fp_express_part_cell' — single cell
  with 3 internal rows
- Bake column uses widget='fp_express_bake_pill' — interactive pill
- Totals card now has Subtotal / Tooling Charge / Total Lines / Total
  Quantity / Grand Total + currency pill

SCSS adds:
- Multi-row part cell styles (internal borders, bold/italic/muted rows)
- Bake pill (has-bake amber, no-bake italic muted) + inline editor
- Legend bar (section background, gap-spaced explainer chips)
- PO status pill colour scheme
- Bulk button styling

Wizard's action_create_order now carries tooling_charge to the SO at
confirm so it persists on the resulting sale.order.

fusion_plating/fusion_plating_configurator/wizard/fp_direct_order_line.py

@@ -460,6 +460,24 @@ class FpDirectOrderLine(models.Model):
     )
 
     # ---- Express Orders per-line flags (2026-05-26) ----
+    # Related read-only fields so the FpExpressPartCell OWL widget can
+    # render the multi-row Part cell (part# / revision / name / serials)
+    # without needing extra RPCs.
+    part_number_display = fields.Char(
+        related='part_catalog_id.part_number',
+        string='Part # (display)',
+        readonly=True,
+    )
+    part_revision_display = fields.Char(
+        related='part_catalog_id.revision',
+        string='Revision (display)',
+        readonly=True,
+    )
+    part_name_display = fields.Char(
+        related='part_catalog_id.name',
+        string='Part Name (display)',
+        readonly=True,
+    )
     customer_line_ref = fields.Char(
         string='Customer Line Job #',
         help='Per-line customer sub-reference (e.g. ABC, DEF). Distinct from '

fusion_plating/fusion_plating_configurator/wizard/fp_direct_order_wizard.py

@@ -274,6 +274,34 @@ class FpDirectOrderWizard(models.Model):
         help='Which view created this draft. Drafts list routes click-action '
              'to the matching form. Dropped at phase-out Phase 4.',
     )
+    tooling_charge = fields.Monetary(
+        string='Tooling Charge',
+        currency_field='currency_id',
+        help='Optional one-time tooling fee added to the order total. '
+             'Carried to the SO and appears as a separate line on the '
+             'customer invoice.',
+    )
+
+    # ---- PO status pill (computed, display-only) ----
+    po_status = fields.Selection(
+        [('received', 'Received'),
+         ('pending', 'Pending'),
+         ('missing', 'Missing')],
+        string='PO Status',
+        compute='_compute_po_status',
+        help='Computed: Received if PDF attached, Pending if po_pending=True, '
+             'Missing otherwise.',
+    )
+
+    @api.depends('po_attachment_file', 'po_pending')
+    def _compute_po_status(self):
+        for rec in self:
+            if rec.po_attachment_file:
+                rec.po_status = 'received'
+            elif rec.po_pending:
+                rec.po_status = 'pending'
+            else:
+                rec.po_status = 'missing'
 
     # ---- Lines ----
     line_ids = fields.One2many(
@@ -674,6 +702,7 @@ class FpDirectOrderWizard(models.Model):
             # Express Orders header (2026-05-26)
             'x_fc_internal_notes': self.internal_notes or False,
             'x_fc_material_process': self.material_process or False,
+            'x_fc_tooling_charge': 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': [],