feat: add subscribtion scheduler with ai, pagination

keyboards.py

@@ -0,0 +1,41 @@
+from aiogram.types import InlineKeyboardButton
+from aiogram.utils.keyboard import InlineKeyboardBuilder
+
+def get_start_kb():
+    builder = InlineKeyboardBuilder()
+    builder.row(InlineKeyboardButton(text="✅ Подписаться", callback_data="subscribe"))
+    builder.row(InlineKeyboardButton(text="📄 Читать оферту", url="https://telegra.ph/..."))
+    return builder.as_markup()
+
+def get_profile_edit_kb():
+    builder = InlineKeyboardBuilder()
+    builder.row(InlineKeyboardButton(text="📝 Редактировать профиль", callback_data="subscribe"))
+    return builder.as_markup()
+
+def get_spheres_kb():
+    builder = InlineKeyboardBuilder()
+    spheres = ["Backend", "Frontend", "Mobile", "DevOps", "Design", "QA"]
+    for sphere in spheres:
+        builder.add(InlineKeyboardButton(text=sphere, callback_data=f"sphere_{sphere}"))
+    builder.row(InlineKeyboardButton(text="⌨️ Свой вариант", callback_data="sphere_other"))
+    builder.adjust(2)
+    return builder.as_markup()
+
+def get_skip_kb():
+    builder = InlineKeyboardBuilder()
+    builder.row(InlineKeyboardButton(text="⏩ Пропустить", callback_data="skip_preferences"))
+    return builder.as_markup()
+
+def get_pagination_kb(page: int):
+    builder = InlineKeyboardBuilder()
+    
+    buttons = []
+    if page > 1:
+        buttons.append(InlineKeyboardButton(text="⬅️ Назад", callback_data=f"browse_{page-1}"))
+    
+    buttons.append(InlineKeyboardButton(text=f"📄 Стр. {page}", callback_data="ignore"))
+    
+    buttons.append(InlineKeyboardButton(text="Вперед ➡️", callback_data=f"browse_{page+1}"))
+    
+    builder.row(*buttons)
+    return builder.as_markup()