chore(deps): update dependency tailwindcss to v4

Author: renovate[bot]

bun.lockb

@@ -48,7 +48,7 @@
     "postcss": "^8.5.3",
     "prettier": "^3.5.3",
     "prettier-plugin-tailwindcss": "^0.6.11",
-    "tailwindcss": "3.4.17",
+    "tailwindcss": "4.1.2",
     "typescript": "^5.8.2",
     "undici": "^7.6.0",
     "vercel": "^41.4.1",