feat(ui): add language selector

Adds a language dropdown to the folder picker using the shared selector UI and persists selection to preferences.locale.

packages/ui/src/lib/i18n/messages/en/folderSelection.ts

@@ -1,4 +1,6 @@
 export const folderSelectionMessages = {
+  "folderSelection.language.ariaLabel": "Language",
+
   "folderSelection.logoAlt": "CodeNomad logo",
   "folderSelection.tagline": "Select a folder to start coding with AI",
 

packages/ui/src/lib/i18n/messages/es/folderSelection.ts

@@ -1,4 +1,6 @@
 export const folderSelectionMessages = {
+  "folderSelection.language.ariaLabel": "Idioma",
+
   "folderSelection.logoAlt": "Logo de CodeNomad",
   "folderSelection.tagline": "Selecciona una carpeta para empezar a programar con IA",
 

packages/ui/src/lib/i18n/messages/fr/folderSelection.ts

@@ -1,4 +1,6 @@
 export const folderSelectionMessages = {
+  "folderSelection.language.ariaLabel": "Langue",
+
   "folderSelection.logoAlt": "Logo CodeNomad",
   "folderSelection.tagline": "Sélectionnez un dossier pour commencer à coder avec l'IA",
 

packages/ui/src/lib/i18n/messages/ja/folderSelection.ts

@@ -1,4 +1,6 @@
 export const folderSelectionMessages = {
+  "folderSelection.language.ariaLabel": "言語",
+
   "folderSelection.logoAlt": "CodeNomad ロゴ",
   "folderSelection.tagline": "フォルダを選択して AI でコーディングを開始",
 

packages/ui/src/lib/i18n/messages/ru/folderSelection.ts

@@ -1,4 +1,6 @@
 export const folderSelectionMessages = {
+  "folderSelection.language.ariaLabel": "Язык",
+
   "folderSelection.logoAlt": "Логотип CodeNomad",
   "folderSelection.tagline": "Выберите папку, чтобы начать писать код с AI",
 

packages/ui/src/lib/i18n/messages/zh-Hans/folderSelection.ts

@@ -1,4 +1,6 @@
 export const folderSelectionMessages = {
+  "folderSelection.language.ariaLabel": "语言",
+
   "folderSelection.logoAlt": "CodeNomad 徽标",
   "folderSelection.tagline": "选择文件夹，开始与 AI 一起编码",