feat: add ai chat example and update flags structure

apps/cli/template/base/apps/native/metro.config.js

@@ -2,7 +2,7 @@
 const { getDefaultConfig } = require("expo/metro-config");
 const { FileStore } = require("metro-cache");
 const { withNativeWind } = require("nativewind/metro");
-const path = require("path");
+const path = require("node:path");
 
 const config = withTurborepoManagedCache(
   withMonorepoPaths(

apps/cli/template/base/apps/web/src/routes/__root.tsx

@@ -46,9 +46,11 @@ function RootComponent() {
     <>
       <HeadContent />
       <ThemeProvider defaultTheme="dark" storageKey="vite-ui-theme">
-        <Header />
-        {isFetching && <Loader />}
-        <Outlet />
+        <div className="grid grid-rows-[auto_1fr] h-svh">
+          <Header />
+          {isFetching && <Loader />}
+          <Outlet />
+        </div>
         <Toaster richColors />
       </ThemeProvider>
       <TanStackRouterDevtools position="bottom-left" />