Stage 05.7 - trade draft UI restructuring and order context display

app/src/trading/orders/models.py

@@ -20,7 +20,9 @@ class OrderEntryContext:
     symbol: str
     side: str
     order_type: str
+    base_currency: str
     balance_currency: str
+    quote_currency: str
     available_balance: float
     reference_price: float
     last_price: float

app/src/trading/orders/service.py

@@ -181,15 +181,40 @@ class OrderDraftsService:
         return self.repository.get_draft_by_id(draft_id)
 
     def get_entry_context(self, *, side: str, order_type: str) -> OrderEntryContext:
+        # Собираем контекст экрана ввода ордера на основе биржевых правил,
+        # текущего рынка и доступного баланса.
         validation = self.exchange.validate_symbol(self.settings.default_symbol)
         if not validation.is_valid or validation.symbol_info is None:
             raise ValueError(validation.message)
 
+        symbol_info = validation.symbol_info
         balances = self.exchange.get_balance_summary()
         market = self.exchange.get_market_snapshot(self.settings.default_symbol)
 
-        base_asset = validation.symbol_info.base_asset or "BASE"
-        quote_asset = validation.symbol_info.quote_asset or "QUOTE"
+        base_asset = (symbol_info.base_asset or "").strip()
+        quote_asset = (symbol_info.quote_asset or "").strip()
+
+        if not base_asset or not quote_asset:
+            message = (
+                "Биржа не вернула base/quote валюту для инструмента. "
+                "Невозможно корректно рассчитать контекст ордера."
+            )
+            try:
+                self.journal.log_error(
+                    "order_entry_context_assets_missing",
+                    message,
+                    {
+                        "symbol": self.settings.default_symbol,
+                        "base_asset": base_asset or None,
+                        "quote_asset": quote_asset or None,
+                    },
+                )
+            except Exception:
+                pass
+            raise ValueError(message)
+
+        base_currency = base_asset.upper()
+        quote_currency = quote_asset.upper()
 
         available_by_currency = {
             item.currency.upper(): float(item.available)
@@ -200,12 +225,12 @@ class OrderDraftsService:
         order_type_upper = order_type.upper()
 
         if side_upper == "BUY":
-            balance_currency = quote_asset.upper()
+            balance_currency = quote_currency
             available_balance = available_by_currency.get(balance_currency, 0.0)
             reference_price = float(market["ask_price"])
             max_qty = (available_balance / reference_price) if reference_price > 0 else 0.0
         else:
-            balance_currency = base_asset.upper()
+            balance_currency = base_currency
             available_balance = available_by_currency.get(balance_currency, 0.0)
             reference_price = float(market["bid_price"])
             max_qty = available_balance
@@ -213,14 +238,16 @@ class OrderDraftsService:
         quantity_presets = self._build_quantity_presets(
             max_qty=max_qty,
             reference_price=reference_price,
-            symbol_info=validation.symbol_info,
+            symbol_info=symbol_info,
         )
 
         return OrderEntryContext(
             symbol=self.settings.default_symbol,
             side=side_upper,
             order_type=order_type_upper,
+            base_currency=base_currency,
             balance_currency=balance_currency,
+            quote_currency=quote_currency,
             available_balance=available_balance,
             reference_price=reference_price,
             last_price=float(market["last_price"]),