fix: improve WSL2 systemd daemon hints

src/commands/doctor-gateway-daemon-flow.ts

@@ -12,7 +12,10 @@ import {
 } from "../daemon/runtime-paths.js";
 import { resolveGatewayService } from "../daemon/service.js";
 import { buildServiceEnvironment } from "../daemon/service-env.js";
+import { isSystemdUserServiceAvailable } from "../daemon/systemd.js";
+import { renderSystemdUnavailableHints } from "../daemon/systemd-hints.js";
 import { formatPortDiagnostics, inspectPortUsage } from "../infra/ports.js";
+import { isWSL } from "../infra/wsl.js";
 import type { RuntimeEnv } from "../runtime.js";
 import { note } from "../terminal/note.js";
 import { sleep } from "../utils.js";
@@ -55,6 +58,14 @@ export async function maybeRepairGatewayDaemon(params: {
   }
 
   if (!loaded) {
+    if (process.platform === "linux") {
+      const systemdAvailable = await isSystemdUserServiceAvailable().catch(() => false);
+      if (!systemdAvailable) {
+        const wsl = await isWSL();
+        note(renderSystemdUnavailableHints({ wsl }).join("\n"), "Gateway");
+        return;
+      }
+    }
     note("Gateway daemon not installed.", "Gateway");
     if (params.cfg.gateway?.mode !== "remote") {
       const install = await params.prompter.confirmSkipInNonInteractive({