Add tabbed settings and system shell

server/src/system.ts

@@ -0,0 +1,15 @@
+import { execFile } from "node:child_process";
+import { promisify } from "node:util";
+import { z } from "zod";
+
+const execFileAsync = promisify(execFile);
+
+export const systemPowerActionSchema = z.enum(["reboot", "poweroff"]);
+export type SystemPowerAction = z.infer<typeof systemPowerActionSchema>;
+
+export async function triggerSystemPower(action: SystemPowerAction): Promise<void> {
+  await execFileAsync("/usr/bin/sudo", ["-n", "/usr/local/sbin/pi-car-companion-power", action], {
+    timeout: 10_000,
+    maxBuffer: 16 * 1024
+  });
+}