add mentions

data/static/js/thread.js

@@ -82,7 +82,6 @@
       quoteButton.textContent = "Quote fragment"
       quoteButton.className = "reduced"
       quotePopover.appendChild(quoteButton);
-
       document.body.appendChild(quotePopover);
       return quoteButton;
     }
@@ -98,7 +97,7 @@
           if (ta.value.trim() !== "") {
             ta.value += "\n"
           }
-          ta.value += `[url=${postPermalink}]${authorUsername} said:[/url]\n[quote]< :scissors: > ${document.getSelection().toString()} < :scissors: >[/quote]\n`;
+          ta.value += `@${authorUsername} [url=${postPermalink}]said:[/url]\n[quote]< :scissors: > ${document.getSelection().toString()} < :scissors: >[/quote]\n`;
           ta.scrollIntoView()
           ta.focus();