chore(deps): update tailwindcss monorepo to v4.1.15

Author: renovate[bot]

package.json

@@ -52,7 +52,7 @@
     "postcss": "8.5.6",
     "prettier": "3.6.2",
     "prettier-plugin-tailwindcss": "0.6.14",
-    "tailwindcss": "4.1.13",
+    "tailwindcss": "4.1.15",
     "typescript": "5.9.2"
   },
   "packageManager": "[email protected]",