Feat: Show estimated delivery date on design review page

- Add expectedDeliveryDate to DesignApproval interface
- Display estimated delivery date in Order Summary section
- Shows the date set by admin when approving the design

Customers can now see when their design will be delivered
before adding it to their bag.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

.claude/settings.local.json

@@ -164,7 +164,8 @@
       "Bash(git commit -m 'Feat: Add loading spinner for made-to-order page *)",
       "Bash(git commit -m 'Revert: Remove loading spinner - was slowing down page *)",
       "Bash(git commit -m 'Fix: Show approved designs in customer account so they can order *)",
-      "Bash(git commit -m 'Fix: Link approved designs to review page, not personalization *)"
+      "Bash(git commit -m 'Fix: Link approved designs to review page, not personalization *)",
+      "Bash(git commit -m 'Feat: Show estimated delivery date on design review page *)"
     ]
   }
 }