#260: replace Success! feedback text with a checkmark so buttons do not resize

internal/web/static/new.js

@@ -197,7 +197,7 @@ function finishCreate(data) {
     try {
       navigator.clipboard.writeText(url);
       copyBtn.classList.add('ok');               // in-place success feedback (#53)
-      copyBtn.textContent = 'Success!';
+      copyBtn.textContent = '✓';
       setTimeout(() => { copyBtn.classList.remove('ok'); copyBtn.textContent = '⧉'; }, 2000);
     } catch(e) { toast('Copy failed', 'error'); }
   });