fix: copy behaviour

components/text-selection-toolbar.tsx

@@ -283,12 +283,21 @@ export function TextSelectionToolbar() {
 
       e.preventDefault();
       const formatted = formatCopyText(text);
+      // The native copy event is synchronous — we can't await the short-link
+      // fetch before setData, so this writes the long highlight URL. It's a
+      // valid fallback and stands if the async upgrade below can't run.
       e.clipboardData?.setData("text/plain", formatted);
+      // Upgrade the clipboard to the shortened /share/<code> URL: copy() hands
+      // the Clipboard API a *promise* of the shortened text, which keeps this
+      // gesture's activation alive while createShortLink resolves (the same
+      // trick the toolbar's Copy button uses). Only when there's a URL to
+      // shorten in the payload.
+      if (formatted.includes("?hl=")) void copy(formatted);
     }
 
     document.addEventListener("copy", handleCopy);
     return () => document.removeEventListener("copy", handleCopy);
-  }, []);
+  }, [copy]);
 
   // Close toolbar on mouse click outside (desktop only)
   useEffect(() => {