build(deps): update Next.js to v15 and ESLint to v9

packages/i18n/src/request.ts

@@ -0,0 +1,27 @@
+import deepmerge from "deepmerge"
+import type { AbstractIntlMessages } from "next-intl"
+import { getRequestConfig } from "next-intl/server"
+
+import type { Locale } from "@repo/utils/constants"
+import { LOCALE_DEFAULT, LOCALES } from "@repo/utils/constants"
+
+export default getRequestConfig(async ({ requestLocale }) => {
+  let locale = await requestLocale
+  if (!LOCALES.includes(locale as Locale)) {
+    locale = LOCALE_DEFAULT
+  }
+
+  const userMessages = (await import(`./translations/${locale}.json`)).default
+  const defaultMessages = (
+    await import(`./translations/${LOCALE_DEFAULT}.json`)
+  ).default
+  const messages = deepmerge<AbstractIntlMessages>(
+    defaultMessages,
+    userMessages,
+  )
+
+  return {
+    locale,
+    messages,
+  }
+})