shareUrl: use URL interface instead of string manipulations

Author: contributor

apps/client/src/widgets/shared_info.tsx

@@ -24,8 +24,7 @@ export default function SharedInfo() {
         const shareId = getShareId(note);
 
         if (syncServerHost) {
-            const cleanedServerHost = syncServerHost.replace(/\/$/, "");
-            link = `${cleanedServerHost}/share/${shareId}`;
+            link = new URL(`/share/${shareId}`, syncServerHost).href;
         } else {
             let host = location.host;
             if (host.endsWith("/")) {