Potential fix for pull request finding 'Useless conditional'

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

web/src/components/modals/ShareMenu.tsx

···
     if (customUrl) return customUrl;
     if (!uri) return "";
 
-    const uriParts = (uri || "").split("/");
+    const uriParts = uri.split("/");
     const rkey = uriParts[uriParts.length - 1];
     const did = uriParts[2];