fix: avoid systemd-supervised gateway retry loop in owned launcher (#700)

electron/gateway/config-sync-env.ts

@@ -0,0 +1,22 @@
+export const SUPERVISED_SYSTEMD_ENV_KEYS = [
+  'OPENCLAW_SYSTEMD_UNIT',
+  'INVOCATION_ID',
+  'SYSTEMD_EXEC_PID',
+  'JOURNAL_STREAM',
+] as const;
+
+export type GatewayEnv = Record<string, string | undefined>;
+
+/**
+ * OpenClaw CLI treats certain environment variables as systemd supervisor hints.
+ * When present in ClawX-owned child-process launches, it can mistakenly enter
+ * a supervised process retry loop. Strip those variables so startup follows
+ * ClawX lifecycle.
+ */
+export function stripSystemdSupervisorEnv(env: GatewayEnv): GatewayEnv {
+  const next = { ...env };
+  for (const key of SUPERVISED_SYSTEMD_ENV_KEYS) {
+    delete next[key];
+  }
+  return next;
+}