Fix: Handle null content in PlanResource::formatContent method

- Fix deprecated warning when passing null to str_replace() function\n- Use null coalescing operator to provide empty string as default value\n- Comply with PHP 8.2+ type requirements

app/Http/Controllers/V1/Server/UniProxyController.php

@@ -147,6 +147,9 @@ class UniProxyController extends Controller
                 'zero_rtt_handshake' => false,
                 'heartbeat' => "3s",
             ],
+            'socks' => [
+                'server_port' => (int) $serverPort,
+            ],
             default => []
         };