feat(configurator): C1+C3 - pricelist currency picker + Express SCSS (light + dark)

C1: product.pricelist._compute_display_name override gated by the
'fp_express_currency_picker' context flag (set on the Express form's
pricelist_id field). When active, prefixes the dropdown label with
the currency code: 'CAD — Public Pricelist (CAD)'. Elsewhere the
standard display name is unchanged.

C3: SCSS tokens + base styles for the Express form. Tokens use the
compile-time @if $o-webclient-color-scheme branch per the project's
'Dark Mode' rule — same SCSS compiles into both bundles with different
hex values. Token vars wrapped in CSS custom properties so downstream
modules can override for per-shop branding without recompiling.
Base styles: spreadsheet-feel table borders, bake-cell inset-pill,
customer line ref bold/uppercase, accent section markers.

fusion_plating/fusion_plating_configurator/models/__init__.py

@@ -17,3 +17,4 @@ from . import account_move_line
 from . import fp_sale_assembly
 from . import res_partner
 from . import fp_process_node
+from . import product_pricelist

fusion_plating/fusion_plating_configurator/models/product_pricelist.py

@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+# Copyright 2026 Nexa Systems Inc.
+# License OPL-1 (Odoo Proprietary License v1.0)
+# Part of the Fusion Plating product family.
+
+from odoo import api, models
+
+
+class ProductPricelist(models.Model):
+    """Express Orders currency-picker enhancement (C1 / 2026-05-26).
+
+    When rendered with `fp_express_currency_picker=True` in context (set
+    by the Express Orders form's pricelist_id field), prefix the display
+    name with the currency code so the dropdown reads:
+
+        CAD — Public Pricelist (CAD)
+        USD — Westin USA Pricelist
+        EUR — Public Pricelist (EUR)
+
+    Elsewhere in Odoo (partner form, sale.order, settings), the standard
+    pricelist display name is unchanged.
+    """
+    _inherit = 'product.pricelist'
+
+    @api.depends('name', 'currency_id')
+    @api.depends_context('fp_express_currency_picker')
+    def _compute_display_name(self):
+        super()._compute_display_name()
+        if self.env.context.get('fp_express_currency_picker'):
+            for pl in self:
+                if pl.currency_id and pl.currency_id.name not in (pl.display_name or ''):
+                    pl.display_name = f"{pl.currency_id.name} — {pl.name}"