fix: Set detected language on first login, remove auto-detect language option

server/api/controllers/users/update.js

@@ -57,7 +57,6 @@
  *               language:
  *                 type: string
  *                 enum: [ar-YE, bg-BG, cs-CZ, da-DK, de-DE, el-GR, en-GB, en-US, es-ES, et-EE, fa-IR, fi-FI, fr-FR, hu-HU, id-ID, it-IT, ja-JP, ko-KR, nl-NL, pl-PL, pt-BR, pt-PT, ro-RO, ru-RU, sk-SK, sr-Cyrl-RS, sr-Latn-RS, sv-SE, tr-TR, uk-UA, uz-UZ, zh-CN, zh-TW]
- *                 nullable: true
  *                 description: Preferred language for user interface and notifications
  *                 example: en-US
  *               subscribeToOwnCards:
@@ -167,7 +166,6 @@ module.exports = {
     language: {
       type: 'string',
       isIn: User.LANGUAGES,
-      allowNull: true,
     },
     subscribeToOwnCards: {
       type: 'boolean',