Update dependencies and enhance project structure. Upgraded Tailwind CSS to version 4.1.0, removed obsolete configuration files, and added a comprehensive CURRENT_STATE.md file detailing project features, architecture, and future plans. Improved history management in the backend with new response models and optimized API endpoints for better data handling.

app/vite.config.ts

@@ -1,9 +1,10 @@
 import path from 'node:path';
+import tailwindcss from '@tailwindcss/vite';
 import react from '@vitejs/plugin-react';
 import { defineConfig } from 'vite';
 
 export default defineConfig({
-  plugins: [react()],
+  plugins: [tailwindcss(), react()],
   resolve: {
     alias: {
       '@': path.resolve(__dirname, './src'),