feat(board): add mobile home board (#1910)

* feat(board): add mobile home board

* fix: add missing translations

* fix: mysql key reference with other datatype

* fix: format issue

* fix: missing trpc context arguments in tests

* fix: missing trpc context arguments in tests

packages/server-settings/src/index.ts

@@ -27,6 +27,7 @@ export const defaultServerSettings = {
   },
   board: {
     homeBoardId: null as string | null,
+    mobileHomeBoardId: null as string | null,
   },
   appearance: {
     defaultColorScheme: "light" as ColorScheme,