feat: always show language selector on /start, add change_language button in profile

- /start now always shows language picker (removed language_set check)
- Added 'Change Language' button in profile inline keyboard
- Added handleChangeLanguage callback handler
- Added profile.change_language locale key in en/es/de
- Registered change_language callback route

src/handlers/userHandlers/userHandler.js

@@ -79,6 +79,7 @@ ${t('profile.member_since')}: ${new Date(userStats.created_at).toLocaleDateStrin
             const keyboard = {
                 inline_keyboard: [
                     [{text: t('profile.set_location'), callback_data: 'set_location'}],
+                    [{text: t('profile.change_language'), callback_data: 'change_language'}],
                     [{text: t('profile.delete_account'), callback_data: 'delete_account'}]
                 ]
             };
@@ -104,33 +105,13 @@ ${t('profile.member_since')}: ${new Date(userStats.created_at).toLocaleDateStrin
                 username: username
             });
 
-            const user = await UserService.getUserByTelegramId(telegramId);
-            const lang = user?.language;
-
-            if (!user?.language_set) {
-                const keyboard = {
-                    inline_keyboard: AVAILABLE_LANGUAGES.map(code => [{
-                        text: LANGUAGE_NAMES[code],
-                        callback_data: `set_language_${code}`
-                    }])
-                };
-                await bot.sendMessage(chatId, tForUser('en')('bot.language_select'), { reply_markup: keyboard });
-                return;
-            }
-
-            const t = tForUser(lang);
-
             const keyboard = {
-                reply_markup: {
-                    keyboard: [
-                        [t('keyboard.products'), t('keyboard.profile')],
-                        [t('keyboard.purchases'), t('keyboard.wallets')]
-                    ],
-                    resize_keyboard: true
-                }
+                inline_keyboard: AVAILABLE_LANGUAGES.map(code => [{
+                    text: LANGUAGE_NAMES[code],
+                    callback_data: `set_language_${code}`
+                }])
             };
-
-            await bot.sendMessage(chatId, t('bot.welcome'), keyboard);
+            await bot.sendMessage(chatId, tForUser('en')('bot.language_select'), { reply_markup: keyboard });
         } catch (error) {
             logger.error({ err: error }, 'Error in handleStart');
             const fallbackT = tForUser('en');
@@ -172,6 +153,25 @@ ${t('profile.member_since')}: ${new Date(userStats.created_at).toLocaleDateStrin
         }
     }
 
+    static async handleChangeLanguage(callbackQuery) {
+        const chatId = callbackQuery.message.chat.id;
+        const user = callbackQuery.message.__user || await UserService.getUserByTelegramId(callbackQuery.from.id);
+        const currentLang = user?.language || 'en';
+
+        const keyboard = {
+            inline_keyboard: AVAILABLE_LANGUAGES.map(code => [{
+                text: LANGUAGE_NAMES[code],
+                callback_data: `set_language_${code}`
+            }])
+        };
+
+        try {
+            await bot.deleteMessage(chatId, callbackQuery.message.message_id);
+        } catch {}
+
+        await bot.sendMessage(chatId, tForUser(currentLang)('bot.language_select'), { reply_markup: keyboard });
+    }
+
     static async handleLanguageCommand(msg) {
         const chatId = msg.chat.id;
 

src/i18n/locales/de.json

@@ -23,6 +23,7 @@
     "available_balance": "Verfügbares Guthaben",
     "member_since": "📅 Mitglied seit",
     "set_location": "📍 Standort festlegen",
+    "change_language": "🌐 Sprache ändern",
     "delete_account": "❌ Konto löschen",
     "error_loading": "Fehler beim Laden des Profils. Bitte versuche es erneut."
   },

src/i18n/locales/en.json

@@ -23,6 +23,7 @@
     "available_balance": "Available Balance",
     "member_since": "📅 Member since",
     "set_location": "📍 Set Location",
+    "change_language": "🌐 Change Language",
     "delete_account": "❌ Delete Account",
     "error_loading": "Error loading profile. Please try again."
   },

src/i18n/locales/es.json

@@ -23,6 +23,7 @@
     "available_balance": "Saldo disponible",
     "member_since": "📅 Miembro desde",
     "set_location": "📍 Establecer ubicación",
+    "change_language": "🌐 Cambiar idioma",
     "delete_account": "❌ Eliminar cuenta",
     "error_loading": "Error al cargar perfil. Inténtalo de nuevo."
   },

src/router/routes.js

@@ -86,6 +86,10 @@ export function registerRoutes() {
         logDebug(cq.data, 'handleSetLocation');
         await userLocationHandler.handleSetLocation(cq);
     });
+    callbackRouter.registerExact('change_language', async (cq) => {
+        logDebug(cq.data, 'handleChangeLanguage');
+        await userHandler.handleChangeLanguage(cq);
+    });
     callbackRouter.registerExact('back_to_profile', async (cq) => {
         logDebug(cq.data, 'handleBackToProfile');
         await userHandler.handleBackToProfile(cq);