refactor(alert-settings): integrate AppShell layout and update cache version

- Replace custom page layout with AppShell component for consistent UI
- Remove unused PageHeader and UpdateAlertConditionDto imports
- Update service worker cache names and version.json to new timestamp

src/components/layout/index.ts

@@ -0,0 +1,4 @@
+export { AppShell } from './AppShell'
+export { BottomNav } from './BottomNav'
+export { TopHeader } from './TopHeader'
+export { DeviceProvider, useDevice } from './DeviceProvider'