fix: Deprecated TanStackRouterVite, correct import and usage of tanstackRouter in vite.config.ts

vite.config.ts

@@ -2,7 +2,7 @@ import path from 'node:path';
 import { defineConfig, loadEnv } from 'vite';
 import react from '@vitejs/plugin-react';
 import tailwindcss from '@tailwindcss/vite';
-import { TanStackRouterVite } from '@tanstack/router-plugin/vite';
+import { tanstackRouter } from '@tanstack/router-plugin/vite';
 
 // https://vite.dev/config/
 export default defineConfig(({ mode }) => {
@@ -16,7 +16,7 @@ export default defineConfig(({ mode }) => {
     plugins: [
       // Router plugin must run BEFORE @vitejs/plugin-react so the generated
       // routeTree is in place when React's transform runs.
-      TanStackRouterVite({ target: 'react', autoCodeSplitting: true }),
+      tanstackRouter({ target: 'react', autoCodeSplitting: true }),
       react(),
       tailwindcss(),
     ],