Nascondi messaggio di successo finché non viene aggiunto un server

index.html

@@ -281,7 +281,7 @@ footer a{color:var(--accent);text-decoration:none}
           <button class="btn" id="submit">Add server</button>
         </div>
 
-        <div class="ok-line" id="iv-status">✓ Server added. Pay the invoice to complete.</div>
+        <div class="ok-line" id="iv-status"></div>
 
         <div class="invoice" id="invoice">
           <div class="row"><span>Minimum amount</span><span id="iv-min">—</span></div>
@@ -452,6 +452,7 @@ async function checkServer(url, chain) {
     }
   } catch (err) {
     flag.textContent = '✗ error';
+    console.error('Fetch error:', err);
     flag.className = 'flag-err';
   }
 }