Update to NextJS 16

eslint.config.mjs

@@ -1,16 +1,18 @@
-import { dirname } from 'path'
-import { fileURLToPath } from 'url'
-import { FlatCompat } from '@eslint/eslintrc'
+import { defineConfig, globalIgnores } from 'eslint/config'
+import nextVitals from 'eslint-config-next/core-web-vitals'
+import nextTs from 'eslint-config-next/typescript'
 
-const __filename = fileURLToPath(import.meta.url)
-const __dirname = dirname(__filename)
-
-const compat = new FlatCompat({
-  baseDirectory: __dirname
-})
-
-const eslintConfig = [
-  ...compat.extends('next/core-web-vitals', 'next/typescript')
-]
+const eslintConfig = defineConfig([
+  ...nextVitals,
+  ...nextTs,
+  // Override default ignores of eslint-config-next.
+  globalIgnores([
+    // Default ignores of eslint-config-next:
+    '.next/**',
+    'out/**',
+    'build/**',
+    'next-env.d.ts'
+  ])
+])
 
 export default eslintConfig

package.json

@@ -11,21 +11,21 @@
     "tauri": "tauri"
   },
   "dependencies": {
-    "@tauri-apps/api": "2.8.0",
-    "react": "19.1.0",
-    "react-dom": "19.1.1",
-    "next": "15.5.4"
+    "@tauri-apps/api": "2.9.0",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
+    "next": "16.0.0"
   },
   "devDependencies": {
-    "@tauri-apps/cli": "2.8.4",
-    "typescript": "5.9.2",
-    "@types/node": "24.5.2",
-    "@types/react": "19.1.15",
-    "@types/react-dom": "19.1.9",
-    "@tailwindcss/postcss": "4.1.13",
-    "tailwindcss": "4.1.13",
-    "eslint": "9.36.0",
-    "eslint-config-next": "15.5.4",
+    "@tauri-apps/cli": "2.9.1",
+    "typescript": "5.9.3",
+    "@types/node": "24.9.1",
+    "@types/react": "19.2.2",
+    "@types/react-dom": "19.2.2",
+    "@tailwindcss/postcss": "4.1.16",
+    "tailwindcss": "4.1.16",
+    "eslint": "9.38.0",
+    "eslint-config-next": "16.0.0",
     "@eslint/eslintrc": "3.3.1"
   }
 }

postcss.config.mjs

@@ -1,5 +1,7 @@
 const config = {
-  plugins: ['@tailwindcss/postcss']
+  plugins: {
+    '@tailwindcss/postcss': {}
+  }
 }
 
 export default config

tsconfig.json

@@ -11,7 +11,7 @@
     "moduleResolution": "bundler",
     "resolveJsonModule": true,
     "isolatedModules": true,
-    "jsx": "preserve",
+    "jsx": "react-jsx",
     "incremental": true,
     "plugins": [
       {
@@ -22,6 +22,13 @@
       "@/*": ["./src/*"]
     }
   },
-  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+  "include": [
+    "next-env.d.ts",
+    "**/*.ts",
+    "**/*.tsx",
+    ".next/types/**/*.ts",
+    ".next/dev/types/**/*.ts",
+    "**/*.mts"
+  ],
   "exclude": ["node_modules"]
 }