feat: unify market/portfolio/system UI, improve exchange errors and asset valuation

app/src/telegram/handlers/system.py

@@ -4,16 +4,66 @@ from __future__ import annotations
 
 from aiogram import F, Router
 from aiogram.fsm.context import FSMContext
-from aiogram.types import Message
+from aiogram.types import CallbackQuery, InlineKeyboardMarkup, Message
+from aiogram.utils.keyboard import InlineKeyboardBuilder
 
-from src.core.system_status import build_system_text
+from src.core.system_status import build_system_text, get_system_snapshot, has_system_alerts
 
 
 router = Router(name="system")
 
 
+def _system_keyboard() -> InlineKeyboardMarkup:
+    builder = InlineKeyboardBuilder()
+    builder.button(text="🏠 К торговле", callback_data="trade:home")
+    builder.adjust(1)
+    return builder.as_markup()
+
+
+def _system_alert_keyboard() -> InlineKeyboardMarkup:
+    builder = InlineKeyboardBuilder()
+    builder.button(text="🔁 Обновить", callback_data="system:retry")
+    builder.button(text="🏠 К торговле", callback_data="trade:home")
+    builder.adjust(1, 1)
+    return builder.as_markup()
+
+
+async def _render_system_screen(
+    target_message: Message,
+    *,
+    edit_mode: bool,
+) -> None:
+    snapshot = get_system_snapshot()
+    is_alert = has_system_alerts(snapshot)
+
+    text = build_system_text(include_updated_at=is_alert)
+    reply_markup = _system_alert_keyboard() if is_alert else _system_keyboard()
+
+    if edit_mode:
+        await target_message.edit_text(text, reply_markup=reply_markup)
+    else:
+        await target_message.answer(text, reply_markup=reply_markup)
+
+
 @router.message(F.text.in_({"⚙️ Система", "⚙ Система"}))
 async def open_system(message: Message, state: FSMContext) -> None:
-    # Глобальный экран: всегда выходим из текущего FSM-сценария.
     await state.clear()
-    await message.answer(build_system_text())
+    await _render_system_screen(
+        message,
+        edit_mode=False,
+    )
+
+
+@router.callback_query(F.data == "system:retry")
+async def retry_system(callback: CallbackQuery, state: FSMContext) -> None:
+    await state.clear()
+
+    if callback.message is None:
+        await callback.answer("Сообщение не найдено", show_alert=True)
+        return
+
+    await _render_system_screen(
+        callback.message,
+        edit_mode=True,
+    )
+    await callback.answer()