Improve Cluster Dashboard Timeline (#1)

Reviewed-on: tanztee/hyprcrd#1

public/plugins/support/backend.php

@@ -296,6 +296,12 @@ PluginManager::instance()->onApiRoute(function (string $route, string $method) {
     }
 
     if ($route === '/api/support/poll' && $method === 'POST') {
+        // Mirrors /api/relay/poll: an unconfigured support relay is a normal
+        // resting state, not an error. Returning 502 here floods the network
+        // tab on every background poll for users who don't use the plugin.
+        if (supportRelayUrl() === '' || supportRelayKey() === '') {
+            supportJson(['ok' => true, 'pulled' => 0]);
+        }
         $last = supportSetting('last_polled_at', '') ?: '';
         $qs = $last !== '' ? '?since=' . urlencode($last) : '';
         $res = supportCurl('/api/hyprcrd/tickets' . $qs, 'GET');