Refactor bot handlers and keyboards; implement admin features

- Removed unused prehandling, referrals, support, and states files.
- Updated admin and client handlers to improve structure and functionality.
- Introduced admin filters and routers for better access control.
- Added new billing and deposit functionalities for client interactions.
- Enhanced keyboard layouts for admin and client menus.
- Implemented promotion handling for admin users.
- Updated configuration to include admin settings.
- Improved utility functions for quote fetching and menu text building.
- Added common handlers for undefined commands and message deletions.

bot/keyboards/admins.py

@@ -1,16 +1,16 @@
 from aiogram.types import InlineKeyboardButton, InlineKeyboardMarkup
 from aiogram.utils.keyboard import InlineKeyboardBuilder
 
-promotion_confirmation: InlineKeyboardMarkup = InlineKeyboardBuilder(
+main_menu: InlineKeyboardMarkup = InlineKeyboardBuilder(
+    [
+        [InlineKeyboardButton(text="📢 Рассылка", callback_data="promotion")],
+        [InlineKeyboardButton(text="👤 Управление пользователем", callback_data="usermgmt")],
+    ]
+).as_markup()
+
+action_confirmation: InlineKeyboardMarkup = InlineKeyboardBuilder(
     [
         [InlineKeyboardButton(text="✅", callback_data="approve")],
         [InlineKeyboardButton(text="❌", callback_data="decline")],
     ]
 ).as_markup()
-
-ticket_actions: InlineKeyboardMarkup = InlineKeyboardBuilder(
-    [
-        [InlineKeyboardButton(text="🔒", callback_data="close")],
-        [InlineKeyboardButton(text="💸 Пополнить баланс реферала", callback_data="refpay")],
-    ]
-).as_markup()

bot/keyboards/client.py

@@ -4,6 +4,7 @@ from aiogram.utils.keyboard import InlineKeyboardBuilder
 from config import settings
 from misc.utils import convert_duration_to_int
 from schemas.subscriptions import SubscriptionDuration
+from .common import _return_to_menu_btn
 
 main_menu = InlineKeyboardBuilder(
     [
@@ -24,12 +25,6 @@ main_menu = InlineKeyboardBuilder(
     ]
 ).as_markup()
 
-_return_to_menu_btn: InlineKeyboardButton = InlineKeyboardButton(
-    text="⬅️ Назад", callback_data="menu:main"
-)
-
-return_to_menu: InlineKeyboardMarkup = InlineKeyboardBuilder([[_return_to_menu_btn]]).as_markup()
-
 payment_gateways: InlineKeyboardMarkup = InlineKeyboardBuilder(
     [
         [InlineKeyboardButton(text="💸 Pally (СБП / Карта)", callback_data="billing:pally")],
@@ -54,7 +49,9 @@ deposit_kb: InlineKeyboardMarkup = InlineKeyboardBuilder(
 ).as_markup()
 
 
-def subscription_controls(show_autorenew: bool, current_autorenewal_status: bool = None) -> InlineKeyboardMarkup:
+def subscription_controls(
+    show_autorenew: bool, current_autorenewal_status: bool | None = None
+) -> InlineKeyboardMarkup:
     builder = InlineKeyboardBuilder()
 
     if show_autorenew:
@@ -64,7 +61,7 @@ def subscription_controls(show_autorenew: bool, current_autorenewal_status: bool
             else "🔴 Отключить автопродление"
         )
         builder.row(InlineKeyboardButton(text=autorenewal_text, callback_data="toggle:autorenewal"))
-    
+
     builder.row(_return_to_menu_btn)
     return builder.as_markup()
 

bot/keyboards/common.py

@@ -0,0 +1,12 @@
+from aiogram.types import InlineKeyboardButton, InlineKeyboardMarkup
+from aiogram.utils.keyboard import InlineKeyboardBuilder
+
+from config import settings
+from misc.utils import convert_duration_to_int
+from schemas.subscriptions import SubscriptionDuration
+
+_return_to_menu_btn: InlineKeyboardButton = InlineKeyboardButton(
+    text="⬅️ Назад", callback_data="menu:main"
+)
+
+return_to_menu: InlineKeyboardMarkup = InlineKeyboardBuilder([[_return_to_menu_btn]]).as_markup()