fix: don't block connect on offline ping — always allow connection attempt

Server may be reachable even if ping failed (transient timeout).
User should always be able to try connecting. Fingerprint change
still shows confirm dialog (accept/reject).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

desktop/src/main.ts

@@ -368,7 +368,7 @@ async function doConnect() {
     saveSettingsObj(s);
   }
 
-  if (ls === "offline") { connectError.textContent = "Relay is offline"; return; }
+  // Don't block connect on offline — ping may have failed transiently
 
   connectError.textContent = "";
   connectBtn.disabled = true;