fix: update tailwindcss version and add postcss dependency in package.json

package.json

@@ -42,6 +42,7 @@
     "@radix-ui/react-toggle-group": "^1.1.11",
     "@radix-ui/react-tooltip": "^1.2.8",
     "@supabase/supabase-js": "^2.75.0",
+    "@tailwindcss/postcss": "^4.1.14",
     "@tanstack/react-query": "^5.90.2",
     "@uppy/core": "^5.1.0",
     "@uppy/dashboard": "^5.0.2",
@@ -85,7 +86,7 @@
     "globals": "^16.4.0",
     "lovable-tagger": "^1.1.10",
     "postcss": "^8.5.6",
-    "tailwindcss": "^4.1.14",
+    "tailwindcss": "^3.4.17",
     "typescript": "^5.9.3",
     "typescript-eslint": "^8.46.0",
     "vite": "^7.1.9"