feat: use realtime quotes in summaries

tests/test_calculations.py

@@ -4,7 +4,7 @@ from decimal import Decimal
 import pytest
 
 from grid_trading.domain.calculations import CalculationError, calculate_positions, estimate_fees
-from grid_trading.domain.models import FeeRules, Instrument, Trade, TradeGroup, TradeSide
+from grid_trading.domain.models import FeeRules, Instrument, QuoteSnapshot, Trade, TradeGroup, TradeSide
 
 
 def make_trade(
@@ -111,6 +111,36 @@ def test_t_plus_one_available_quantity_excludes_today_buys():
     assert summary.available_quantity == 200
 
 
+def test_quote_snapshot_overrides_manual_price_for_position_value():
+    today = date(2026, 7, 8)
+    instrument = Instrument(id=1, code="510300", name="沪深300ETF", manual_price=Decimal("3.90"))
+    trades = [
+        make_trade(
+            trade_id=1,
+            trade_date=today - timedelta(days=1),
+            side=TradeSide.BUY,
+            price="4.00",
+            quantity=1000,
+            trade_group=TradeGroup.BASE,
+        )
+    ]
+    quotes = {
+        1: QuoteSnapshot(
+            symbol="sh510300",
+            code="510300",
+            name="沪深300ETF",
+            price=Decimal("4.12"),
+            source="tencent",
+        )
+    }
+
+    [summary] = calculate_positions([instrument], trades, as_of=today, quote_snapshots=quotes)
+
+    assert summary.current_price == Decimal("4.12")
+    assert summary.price_source == "tencent"
+    assert summary.market_value == Decimal("4120.00")
+
+
 def test_sell_more_than_group_position_raises():
     today = date(2026, 7, 8)
     instrument = Instrument(id=1, code="159915", name="创业板ETF")