feat(renderer): auto-check for updates 5s after launch when enabled

src/renderer/App.tsx

@@ -7,9 +7,11 @@ import { PrintPreview } from './components/tools/PrintPreview';
 import { UpdateBanner } from './components/UpdateBanner';
 import { FirstRunWizard } from './components/FirstRunWizard';
 import { useWelcomeTrigger } from './hooks/use-welcome-trigger';
+import { useAutoUpdateCheck } from './hooks/useAutoUpdateCheck';
 
 function App() {
   useWelcomeTrigger();
+  useAutoUpdateCheck();
   const [printOpen, setPrintOpen] = useState(false);
 
   useEffect(() => {

src/renderer/hooks/useAutoUpdateCheck.ts

@@ -0,0 +1,14 @@
+import { useEffect } from 'react';
+import { useSettingsStore } from '@/stores/settings-store';
+import { useUpdaterStore } from '@/lib/updater-store';
+
+export function useAutoUpdateCheck() {
+  const auto = useSettingsStore((s) => s.autoCheckUpdates);
+  const check = useUpdaterStore((s) => s.check);
+  useEffect(() => {
+    if (auto) {
+      const t = setTimeout(() => { check(); }, 5_000);
+      return () => clearTimeout(t);
+    }
+  }, [auto, check]);
+}