Add optional Apple Books button to downloads and book cards; v1.1.42

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/App.tsx

@@ -267,6 +267,8 @@ interface DownloadPageResource {
   resourceId: string
   amazonUrl?: string
   amazonLabel?: string
+  appleBooksUrl?: string
+  appleBooksLabel?: string
   isPrimaryGuide?: boolean
 }
 
@@ -284,6 +286,8 @@ function resolveDownloadPageResource(content: SiteContent, pageId: string | unde
       resourceId: 'primary-guide',
       amazonUrl: content.studyGuideUrl,
       amazonLabel: content.studyGuideAmazonButtonLabel,
+      appleBooksUrl: content.studyGuideAppleBooksUrl,
+      appleBooksLabel: content.studyGuideAppleBooksLabel,
       isPrimaryGuide: true,
     }
   }
@@ -303,6 +307,8 @@ function resolveDownloadPageResource(content: SiteContent, pageId: string | unde
       resourceId: buildCustomResourceDownloadId(resource.id),
       amazonUrl: resource.amazonUrl,
       amazonLabel: resource.amazonLabel,
+      appleBooksUrl: resource.appleBooksUrl,
+      appleBooksLabel: resource.appleBooksLabel,
     }
   }
 
@@ -854,6 +860,11 @@ function DownloadDetailPage({ content }: { content: SiteContent }) {
               {resource.amazonLabel || 'Get it on Amazon'}
             </a>
           )}
+          {resource.appleBooksUrl && (
+            <a href={resource.appleBooksUrl} target="_blank" rel="noreferrer" className="btn-secondary">
+              {resource.appleBooksLabel || 'Get it on Apple Books'}
+            </a>
+          )}
           <Link to="/resources" className="btn-secondary">Back to Downloads</Link>
         </div>
 
@@ -1804,6 +1815,11 @@ function BooksAndResourcesSection({ content }: { content: SiteContent }) {
                         {book.amazonUrl ? (book.amazonLabel || 'View on Amazon') : (book.amazonLabel || 'Learn More')}
                       </a>
                     )}
+                    {book.appleBooksUrl && (
+                      <a href={book.appleBooksUrl} target="_blank" rel="noopener noreferrer" className="btn-secondary book-card-btn">
+                        {book.appleBooksLabel || 'Get it on Apple Books'}
+                      </a>
+                    )}
                   </div>
                 </div>
               ))}