Fix the service runtime

- The trim is required
- To prevent an error by using: ?? ''

app/system/resources/dashboard/system_services.php

@@ -57,9 +57,9 @@
 	if (!function_exists('is_running')) {
 		function is_running(string $name) {
 			$name = escapeshellarg($name);
-			$pid = shell_exec("ps -aux | grep $name | grep -v grep | awk '{print \$2}' | head -n 1");
+			$pid = trim(shell_exec("ps -aux | grep $name | grep -v grep | awk '{print \$2}' | head -n 1") ?? '');
 			if ($pid && is_numeric($pid)) {
-				$etime = shell_exec("ps -p $pid -o etime= | tr -d '\n'");
+				$etime = trim(shell_exec("ps -p $pid -o etime= | tr -d '\n'") ?? '');
 				return ['running' => true, 'pid' => $pid, 'etime' => $etime];
 			}
 			return ['running' => false, 'pid' => null, 'etime' => null];