Fix: Show approved designs in customer account so they can order

- Add query for approved designs (status = 'APPROVED')
- Display 'Ready to order' section in customer account
- Link directly to checkout with design pre-selected
- Show estimated delivery date if set
- Add success message when admin approves design

Now when admin approves a design with expected delivery date:
1. Customer sees it in 'Ready to order' section
2. Can click to view and proceed to payment
3. Can see estimated delivery date

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

.claude/settings.local.json

@@ -162,7 +162,8 @@
       "Bash(git commit -m 'Fix: NavDropdown link navigation with stopPropagation *)",
       "Bash(git commit -m 'Feat: Remove all filters from products pages *)",
       "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 'Revert: Remove loading spinner - was slowing down page *)",
+      "Bash(git commit -m 'Fix: Show approved designs in customer account so they can order *)"
     ]
   }
 }