chore(plating): de-dash shipped code + intake-neutral customer emails

Replace em-dashes and en-dashes with hyphens across 789 shipped source
files (py/xml/js/scss) so the delivered module reads as human-written;
em-dashes had become a recognizable AI-generated tell. Internal .md dev
notes are excluded. The WO-sticker mojibake strippers keep their dash
search targets (now written — / –). No logic changes: comments
and display strings only; validated with py_compile + lxml parse.

Rewrite the 7 customer notification emails to be intake-neutral
(ship-in / drop-off / pickup) and repair-aware, and fix the Shipped
email documents line (packing slip vs bill of lading; certificate only
when issued). Subjects use a hyphen separator.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating_invoicing/tests/test_manager_invoice_permission.py

@@ -30,7 +30,7 @@ class TestManagerInvoicePermission(TransactionCase):
         self.assertTrue(owner.has_group('account.group_account_invoice'))
 
     def test_shop_manager_does_not_get_billing(self):
-        # Shop Manager is BELOW Manager — must NOT inherit Billing
+        # Shop Manager is BELOW Manager - must NOT inherit Billing
         # ("managers and ABOVE" scope).
         shop = self._user_with('fusion_plating.group_fp_shop_manager_v2')
         self.assertFalse(shop.has_group('account.group_account_invoice'))