fix: improve WSL2 systemd daemon hints

src/daemon/systemd-hints.ts

@@ -0,0 +1,25 @@
+export function isSystemdUnavailableDetail(detail?: string): boolean {
+  if (!detail) return false;
+  const normalized = detail.toLowerCase();
+  return (
+    normalized.includes("systemctl --user unavailable") ||
+    normalized.includes("systemctl not available") ||
+    normalized.includes("not been booted with systemd") ||
+    normalized.includes("failed to connect to bus") ||
+    normalized.includes("systemd user services are required")
+  );
+}
+
+export function renderSystemdUnavailableHints(options: { wsl?: boolean } = {}): string[] {
+  if (options.wsl) {
+    return [
+      "WSL2 needs systemd enabled: edit /etc/wsl.conf with [boot]\\nsystemd=true",
+      "Then run: wsl --shutdown (from PowerShell) and reopen your distro.",
+      "Verify: systemctl --user status",
+    ];
+  }
+  return [
+    "systemd user services are unavailable; install/enable systemd or run the gateway under your supervisor.",
+    "If you're in a container, run the gateway in the foreground instead of `clawdbot daemon`.",
+  ];
+}