Add i18n support with Next.js App Router and Dictionaries

package.json

@@ -13,11 +13,13 @@
     "seed": "tsx prisma/seed.ts"
   },
   "dependencies": {
+    "@formatjs/intl-localematcher": "^0.8.7",
     "@tanstack/react-query": "^5.100.10",
     "bcryptjs": "^3.0.3",
     "imapflow": "^1.3.3",
     "lucide-react": "^1.14.0",
     "mailparser": "^3.9.8",
+    "negotiator": "^1.0.0",
     "next": "16.2.6",
     "next-auth": "^5.0.0-beta.31",
     "nodemailer": "^8.0.7",
@@ -29,6 +31,7 @@
     "@tailwindcss/postcss": "^4",
     "@types/bcryptjs": "^2.4.6",
     "@types/mailparser": "^3.4.6",
+    "@types/negotiator": "^0.6.4",
     "@types/node": "^20",
     "@types/nodemailer": "^8.0.0",
     "@types/react": "^19",