feat: add version update flow

frontend/src/vite-env.d.ts

@@ -1,3 +1,8 @@
 /// <reference types="vite/client" />
 
 declare const __APP_VERSION__: string
+
+interface Window {
+  __aetherShowUpdateDialog?: () => void
+  __aetherMockVersionStatus?: (hasUpdate?: boolean) => void
+}