Enhance localization for user-facing messages across payment and subscription services

- Updated various services to utilize the user's database language for all user-facing messages, improving the localization experience.
- Refactored message retrieval logic in payment processing, subscription management, and notification handling to ensure consistency in language usage.
- Added comments to clarify the purpose of language settings in relevant sections of the code.

bot/handlers/user/payment.py

@@ -198,6 +198,7 @@ async def process_successful_payment(session: AsyncSession, bot: Bot,
             applied_referee_bonus_days_from_referral = referral_bonus_info.get(
                 "referee_bonus_applied_days")
 
+        # Use user's DB language for all user-facing messages
         user_lang = db_user.language_code if db_user and db_user.language_code else settings.DEFAULT_LANGUAGE
         _ = lambda key, **kwargs: i18n.gettext(user_lang, key, **kwargs)
 
@@ -488,6 +489,7 @@ async def yookassa_webhook_route(request: web.Request):
                                             await session.rollback()
                                         # Notify user about successful binding with Back button
                                         try:
+                                            # Use user's DB language for bind success notification
                                             i18n_lang = settings.DEFAULT_LANGUAGE
                                             from db.dal import user_dal
                                             db_user = await user_dal.get_user_by_id(session, user_id)

bot/handlers/user/subscription.py

@@ -2,7 +2,7 @@ import logging
 from aiogram import Router, F, types, Bot
 from aiogram.filters import Command
 from aiogram.types import InlineKeyboardButton, InlineKeyboardMarkup, LabeledPrice
-from typing import Optional, Dict, Any, Union
+from typing import Optional, Dict, Any, Union, List
 from datetime import datetime, timezone
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.future import select
@@ -774,14 +774,14 @@ async def payment_method_history(callback: types.CallbackQuery, settings: Settin
 async def payment_methods_list(callback: types.CallbackQuery, settings: Settings, i18n_data: dict, session: AsyncSession):
     current_lang = i18n_data.get("current_language", settings.DEFAULT_LANGUAGE)
     i18n: Optional[JsonI18n] = i18n_data.get("i18n_instance")
-    _ = lambda key, **kwargs: i18n.gettext(current_lang, key, **kwargs) if i18n else key
+    get_text = lambda key, **kwargs: i18n.gettext(current_lang, key, **kwargs) if i18n else key
 
     # For now we only support single saved YK method; format as list API-ready
     from db.dal.user_billing_dal import list_user_payment_methods
     cards: List[tuple] = []
     methods = await list_user_payment_methods(session, callback.from_user.id)
     for m in methods:
-        title = _("payment_method_card_title", network=m.card_network or "Card", last4=m.card_last4 or "????")
+        title = get_text("payment_method_card_title", network=m.card_network or "Card", last4=m.card_last4 or "????")
         cards.append((str(m.method_id), title if not m.is_default else f"⭐ {title}"))
 
     # Parse page
@@ -791,9 +791,9 @@ async def payment_methods_list(callback: types.CallbackQuery, settings: Settings
     except Exception:
         page = 0
 
-    text = _("payment_methods_title")
+    text = get_text("payment_methods_title")
     if not cards:
-        text += "\n\n" + _("payment_method_none")
+        text += "\n\n" + get_text("payment_method_none")
     await callback.message.edit_text(text, reply_markup=get_payment_methods_list_keyboard(cards, page, current_lang, i18n))
     try:
         await callback.answer()