Fix: Route photo requests to design canvas instead of approval upload

When admin clicks 'Start a design for this' on a photo request, now routes
to the design canvas at /made-to-order/{productSlug} with the custom photo
passed as a query parameter. The DesignCanvas component now accepts and
displays the custom photo as the background for designing.

Changes:
- Updated photo request link to go to design canvas page
- Added customPhoto query parameter to pass custom image URL
- Updated DesignCanvas to accept and use customPhoto prop
- Modified renderPhoto() to display custom photo when provided
- Updated getPhotoInfo() to use custom photo for compositing

.claude/settings.local.json

@@ -79,7 +79,9 @@
       "Bash(git commit -m 'Feature: Add order tracking and shipping status updates *)",
       "Bash(git commit -m 'Feature: Royal Mail tracking integration \\(hybrid approach\\) *)",
       "Bash(git commit -m 'Fix: Refresh page after updating order tracking details *)",
-      "Bash(git commit -m 'Fix: Remove function prop from client component *)"
+      "Bash(git commit -m 'Fix: Remove function prop from client component *)",
+      "Bash(git commit -m 'Fix: Import revalidatePath from correct module *)",
+      "Bash(git commit -m 'Fix: Route photo requests to design canvas instead of approval upload *)"
     ]
   }
 }