feat(core): add tailwind and make UI prettier

package.json

@@ -16,6 +16,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^10.0.1",
+    "@tailwindcss/vite": "^4.2.4",
     "@types/node": "^25.6.0",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
@@ -24,6 +25,7 @@
     "eslint-plugin-react-hooks": "^7.1.1",
     "eslint-plugin-react-refresh": "^0.5.2",
     "globals": "^17.5.0",
+    "tailwindcss": "^4.2.4",
     "typescript": "~6.0.3",
     "typescript-eslint": "^8.59.0",
     "vite": "^8.0.10"