fix(deps): update dependency tailwindcss to v4

Author: renovate[bot]

package.json

@@ -51,7 +51,7 @@
     "react-router-dom": "^7.9.3",
     "react-use-websocket": "^4.13.0",
     "split2": "^4.2.0",
-    "tailwindcss": "^3.4.18",
+    "tailwindcss": "^4.0.0",
     "undici": "^7.16.0",
     "use-error-boundary": "^2.0.6",
     "vite": "^7.1.9",