fix: temporarily hide LinkedIn links and share button

Remove LinkedIn integration from AuthorCard, ShareButtons, and homepage components while keeping the code commented for potential future restoration

src/components/AuthorCard.tsx

@@ -93,6 +93,7 @@ export default function AuthorCard({ lang, author }: AuthorCardProps) {
               </a>
             )}
             
+            {/* LinkedIn link temporarily hidden
             {authorInfo.linkedin && (
               <a
                 href={authorInfo.linkedin}
@@ -106,6 +107,7 @@ export default function AuthorCard({ lang, author }: AuthorCardProps) {
                 </svg>
               </a>
             )}
+            */}
           </div>
         </div>
       </div>

src/components/ShareButtons.tsx

@@ -29,6 +29,7 @@ export default function ShareButtons({ lang, title, url }: ShareButtonsProps) {
       ),
       color: 'hover:bg-blue-500/10 hover:text-blue-500'
     },
+    /* LinkedIn share button temporarily hidden
     {
       name: 'LinkedIn',
       url: `https://www.linkedin.com/sharing/share-offsite/?url=${encodeURIComponent(shareUrl)}`,
@@ -39,6 +40,7 @@ export default function ShareButtons({ lang, title, url }: ShareButtonsProps) {
       ),
       color: 'hover:bg-blue-600/10 hover:text-blue-600'
     },
+    */
     {
       name: 'Facebook',
       url: `https://www.facebook.com/sharer/sharer.php?u=${encodeURIComponent(shareUrl)}`,