feat: add server settings for default board, default color scheme and default locale (#1373)

* feat: add server settings for default board, default color scheme and default locale

* chore: address pull request feedback

* test: adjust unit tests to match requirements

* fix: deepsource issue

* chore: add deepsource as dependency to translation library

* refactor: restructure language-combobox, adjust default locale for next-intl

* chore: change cookie keys prefix from homarr- to homarr.

packages/translation/src/request.ts

@@ -1,17 +1,16 @@
 import deepmerge from "deepmerge";
 import { getRequestConfig } from "next-intl/server";
 
-import { isLocaleSupported } from ".";
+import { fallbackLocale, isLocaleSupported } from ".";
 import type { SupportedLanguage } from "./config";
 import { createLanguageMapping } from "./mapping";
-import { routing } from "./routing";
 
 // This file is referenced in the `next.config.js` file. See https://next-intl-docs.vercel.app/docs/usage/configuration
 export default getRequestConfig(async ({ requestLocale }) => {
   let currentLocale = await requestLocale;
 
   if (!currentLocale || !isLocaleSupported(currentLocale)) {
-    currentLocale = routing.defaultLocale;
+    currentLocale = fallbackLocale;
   }
   const typedLocale = currentLocale as SupportedLanguage;
 
@@ -19,8 +18,8 @@ export default getRequestConfig(async ({ requestLocale }) => {
   const currentMessages = (await languageMap[typedLocale]()).default;
 
   // Fallback to default locale if the current locales messages if not all messages are present
-  if (currentLocale !== routing.defaultLocale) {
-    const fallbackMessages = (await languageMap[routing.defaultLocale]()).default;
+  if (currentLocale !== fallbackLocale) {
+    const fallbackMessages = (await languageMap[fallbackLocale]()).default;
     return {
       locale: currentLocale,
       messages: deepmerge(fallbackMessages, currentMessages),