feat(invoicing): strategy auto-fill + hold check + deposit/COD automation + menu

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

fusion-plating/fusion_plating_invoicing/models/account_move.py

@@ -2,4 +2,27 @@
 # Copyright 2026 Nexa Systems Inc.
 # License OPL-1 (Odoo Proprietary License v1.0)
 # Part of the Fusion Plating product family.
-# Placeholder — implemented in a later task.
+
+from odoo import models, _
+from odoo.exceptions import UserError
+
+
+class AccountMove(models.Model):
+    _inherit = 'account.move'
+
+    def action_post(self):
+        """Check account hold before posting invoices."""
+        for move in self:
+            if move.move_type in ('out_invoice', 'out_refund') and move.partner_id:
+                if move.partner_id.x_fc_account_hold:
+                    is_manager = self.env.user.has_group(
+                        'fusion_plating.group_fusion_plating_manager'
+                    )
+                    if not is_manager:
+                        raise UserError(_(
+                            'Cannot post invoice — customer "%s" is on account hold.\n'
+                            'Reason: %s\n\n'
+                            'Contact a manager to override.'
+                        ) % (move.partner_id.name,
+                             move.partner_id.x_fc_account_hold_reason or 'No reason specified'))
+        return super().action_post()