fix(frontend): remove unused autoprefixer from postcss config

Tailwind CSS v4 with @tailwindcss/postcss includes autoprefixer

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/package-lock.json

@@ -32,10 +32,8 @@
         "@types/node": "^20",
         "@types/react": "^19",
         "@types/react-dom": "^19",
-        "autoprefixer": "^10.4.24",
         "eslint": "^9",
         "eslint-config-next": "16.1.6",
-        "postcss": "^8.5.6",
         "tailwindcss": "^4.1.18",
         "typescript": "^5"
       }
@@ -3421,43 +3419,6 @@
         "node": ">= 0.4"
       }
     },
-    "node_modules/autoprefixer": {
-      "version": "10.4.24",
-      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-10.4.24.tgz",
-      "integrity": "sha512-uHZg7N9ULTVbutaIsDRoUkoS8/h3bdsmVJYZ5l3wv8Cp/6UIIoRDm90hZ+BwxUj/hGBEzLxdHNSKuFpn8WOyZw==",
-      "dev": true,
-      "funding": [
-        {
-          "type": "opencollective",
-          "url": "https://opencollective.com/postcss/"
-        },
-        {
-          "type": "tidelift",
-          "url": "https://tidelift.com/funding/github/npm/autoprefixer"
-        },
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/ai"
-        }
-      ],
-      "license": "MIT",
-      "dependencies": {
-        "browserslist": "^4.28.1",
-        "caniuse-lite": "^1.0.30001766",
-        "fraction.js": "^5.3.4",
-        "picocolors": "^1.1.1",
-        "postcss-value-parser": "^4.2.0"
-      },
-      "bin": {
-        "autoprefixer": "bin/autoprefixer"
-      },
-      "engines": {
-        "node": "^10 || ^12 || >=14"
-      },
-      "peerDependencies": {
-        "postcss": "^8.1.0"
-      }
-    },
     "node_modules/available-typed-arrays": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/available-typed-arrays/-/available-typed-arrays-1.0.7.tgz",
@@ -4856,20 +4817,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/fraction.js": {
-      "version": "5.3.4",
-      "resolved": "https://registry.npmjs.org/fraction.js/-/fraction.js-5.3.4.tgz",
-      "integrity": "sha512-1X1NTtiJphryn/uLQz3whtY6jK3fTqoE3ohKs0tT+Ujr1W59oopxmoEh7Lu5p6vBaPbgoM0bzveAW4Qi5RyWDQ==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": "*"
-      },
-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/rawify"
-      }
-    },
     "node_modules/function-bind": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.2.tgz",
@@ -6666,13 +6613,6 @@
         "node": "^10 || ^12 || >=14"
       }
     },
-    "node_modules/postcss-value-parser": {
-      "version": "4.2.0",
-      "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz",
-      "integrity": "sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==",
-      "dev": true,
-      "license": "MIT"
-    },
     "node_modules/prelude-ls": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.2.1.tgz",

frontend/package.json

@@ -33,10 +33,8 @@
     "@types/node": "^20",
     "@types/react": "^19",
     "@types/react-dom": "^19",
-    "autoprefixer": "^10.4.24",
     "eslint": "^9",
     "eslint-config-next": "16.1.6",
-    "postcss": "^8.5.6",
     "tailwindcss": "^4.1.18",
     "typescript": "^5"
   }

frontend/postcss.config.mjs

@@ -1,7 +1,6 @@
 const config = {
   plugins: {
     "@tailwindcss/postcss": {},
-    autoprefixer: {},
   },
 };