chore(deps): update tailwindcss monorepo to v4.2.1

Author: renovate[bot]

package.json

@@ -30,7 +30,7 @@
   },
   "devDependencies": {
     "@biomejs/biome": "2.3.13",
-    "@tailwindcss/postcss": "4.1.18",
+    "@tailwindcss/postcss": "4.2.1",
     "@tailwindcss/typography": "0.5.19",
     "@types/node": "25.2.0",
     "@types/react": "19.2.10",
@@ -39,7 +39,7 @@
     "husky": "9.1.7",
     "lint-staged": "16.2.7",
     "postcss": "8.5.6",
-    "tailwindcss": "4.1.18",
+    "tailwindcss": "4.2.1",
     "tailwindcss-animate": "1.0.7",
     "typescript": "5.9.3"
   },