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/server-settings/src/index.ts

@@ -1,4 +1,13 @@
-export const defaultServerSettingsKeys = ["analytics", "crawlingAndIndexing"] as const;
+import type { ColorScheme } from "@homarr/definitions";
+import type { SupportedLanguage } from "@homarr/translation";
+
+export const defaultServerSettingsKeys = [
+  "analytics",
+  "crawlingAndIndexing",
+  "board",
+  "appearance",
+  "culture",
+] as const;
 
 export type ServerSettingsRecord = Record<(typeof defaultServerSettingsKeys)[number], Record<string, unknown>>;
 
@@ -15,6 +24,15 @@ export const defaultServerSettings = {
     noTranslate: true,
     noSiteLinksSearchBox: false,
   },
+  board: {
+    defaultBoardId: null as string | null,
+  },
+  appearance: {
+    defaultColorScheme: "light" as ColorScheme,
+  },
+  culture: {
+    defaultLocale: "en" as SupportedLanguage,
+  },
 } satisfies ServerSettingsRecord;
 
 export type ServerSettings = typeof defaultServerSettings;