chore(deps): update dependency tailwindcss to v4

Author: renovate[bot]

package.json

@@ -71,7 +71,7 @@
     "sass": "1.83.4",
     "svelte": "5.19.2",
     "svelte-check": "^4.0.0",
-    "tailwindcss": "^3.3.3",
+    "tailwindcss": "^4.0.0",
     "typescript": "5.7.3",
     "typescript-eslint": "^8.11.0",
     "vitest": "1.6.0",