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_certificates/models/fp_delivery.py

@@ -43,7 +43,7 @@ class FusionPlatingDelivery(models.Model):
                     draft_certs = Cert.search(dom)
                     if draft_certs:
                         raise UserError(_(
-                            'Cannot mark delivery %(d)s shipped — job '
+                            'Cannot mark delivery %(d)s shipped - job '
                             '%(j)s still has %(n)d draft '
                             'certificate(s) (%(types)s). Issue them '
                             'first, or pass fp_skip_cert_gate=True '