Add debugging logs for localStorage draft removal

Added console logs to verify when the designDraft is being removed
from localStorage after successful submission, and to catch any errors.

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

src/components/DesignCanvas.tsx

@@ -973,14 +973,19 @@ export default function DesignCanvas({ product, isAdminEditing = false }: { prod
           setImageDimensions({});
           // Clear localStorage draft and save approval status
           if (typeof window !== 'undefined') {
+            try {
               localStorage.removeItem(`designDraft_${product.id}`);
+              console.log('✓ Removed designDraft from localStorage');
+            } catch (e) {
+              console.error('Failed to remove designDraft:', e);
+            }
             localStorage.setItem(`designApproval_${product.id}`, JSON.stringify({
               id: design.id,
               status: 'PENDING',
               submittedAt: new Date().toISOString(),
             }));
           }
-          console.log('Design submitted for approval:', design.id);
+          console.log('✅ Design submitted for approval:', design.id);
           setTimeout(() => setSubmissionMessage(null), 5000);
         } else if (res.status === 401) {
           setShowLoginPrompt(true);