fix(build): migrate to @tailwindcss/vite and remove conflicting postcss config

web/package-lock.json

@@ -21,6 +21,7 @@
       "devDependencies": {
         "@eslint/js": "^9.39.1",
         "@tailwindcss/postcss": "^4.1.18",
+        "@tailwindcss/vite": "^4.1.18",
         "@types/node": "^24.10.1",
         "@types/react": "^19.2.5",
         "@types/react-dom": "^19.2.3",
@@ -2143,6 +2144,21 @@
         "tailwindcss": "4.1.18"
       }
     },
+    "node_modules/@tailwindcss/vite": {
+      "version": "4.1.18",
+      "resolved": "https://registry.npmjs.org/@tailwindcss/vite/-/vite-4.1.18.tgz",
+      "integrity": "sha512-jVA+/UpKL1vRLg6Hkao5jldawNmRo7mQYrZtNHMIVpLfLhDml5nMRUo/8MwoX2vNXvnaXNNMedrMfMugAVX1nA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@tailwindcss/node": "4.1.18",
+        "@tailwindcss/oxide": "4.1.18",
+        "tailwindcss": "4.1.18"
+      },
+      "peerDependencies": {
+        "vite": "^5.2.0 || ^6 || ^7"
+      }
+    },
     "node_modules/@tanstack/query-core": {
       "version": "5.90.20",
       "resolved": "https://registry.npmjs.org/@tanstack/query-core/-/query-core-5.90.20.tgz",

web/package.json

@@ -23,6 +23,7 @@
   "devDependencies": {
     "@eslint/js": "^9.39.1",
     "@tailwindcss/postcss": "^4.1.18",
+    "@tailwindcss/vite": "^4.1.18",
     "@types/node": "^24.10.1",
     "@types/react": "^19.2.5",
     "@types/react-dom": "^19.2.3",
@@ -42,4 +43,4 @@
   "optionalDependencies": {
     "@rollup/rollup-linux-x64-musl": "^4.2.0"
   }
-}
+}

web/postcss.config.js

@@ -1,6 +0,0 @@
-export default {
-    plugins: {
-        '@tailwindcss/postcss': {},
-        autoprefixer: {},
-    },
-}

web/vite.config.ts

@@ -1,11 +1,13 @@
 import { defineConfig } from 'vite'
 import react from '@vitejs/plugin-react'
+import tailwindcss from '@tailwindcss/vite'
 import { VitePWA } from 'vite-plugin-pwa'
 
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [
     react(),
+    tailwindcss(),
     VitePWA({
       registerType: 'autoUpdate',
       includeAssets: ['favicon.svg', 'robots.txt', 'apple-touch-icon.png'],