feat: show open grid lots

tests/test_open_grid_lots.py

@@ -0,0 +1,105 @@
+from datetime import date, timedelta
+from decimal import Decimal
+
+from grid_trading.domain.models import Trade, TradeGroup, TradeSide
+from grid_trading.domain.open_grid_lots import calculate_open_grid_lots
+
+
+def make_trade(
+    *,
+    trade_id: int,
+    trade_date: date,
+    side: TradeSide,
+    price: str,
+    quantity: int,
+    trade_group: TradeGroup = TradeGroup.GRID,
+) -> Trade:
+    return Trade(
+        id=trade_id,
+        account_id=1,
+        instrument_id=1,
+        trade_date=trade_date,
+        side=side,
+        price=Decimal(price),
+        quantity=quantity,
+        trade_group=trade_group,
+    )
+
+
+def test_calculate_open_grid_lots_fifo_matches_grid_sells_against_grid_buys():
+    today = date(2026, 7, 9)
+    trades = [
+        make_trade(
+            trade_id=1,
+            trade_date=today - timedelta(days=3),
+            side=TradeSide.BUY,
+            price="10.00",
+            quantity=300,
+        ),
+        make_trade(
+            trade_id=2,
+            trade_date=today - timedelta(days=2),
+            side=TradeSide.BUY,
+            price="9.50",
+            quantity=200,
+        ),
+        make_trade(
+            trade_id=3,
+            trade_date=today - timedelta(days=1),
+            side=TradeSide.SELL,
+            price="10.30",
+            quantity=350,
+        ),
+        make_trade(
+            trade_id=4,
+            trade_date=today,
+            side=TradeSide.BUY,
+            price="8.00",
+            quantity=100,
+            trade_group=TradeGroup.BASE,
+        ),
+    ]
+
+    lots = calculate_open_grid_lots(
+        trades,
+        spacing=Decimal("0.03"),
+        current_price=Decimal("9.80"),
+        as_of=today,
+    )
+
+    assert len(lots) == 1
+    [lot] = lots
+    assert lot.buy_trade_id == 2
+    assert lot.buy_date == today - timedelta(days=2)
+    assert lot.buy_price == Decimal("9.50")
+    assert lot.remaining_quantity == 150
+    assert lot.actual_investment == Decimal("1425.00")
+    assert lot.suggested_sell_price == Decimal("9.79")
+    assert lot.estimated_gross_profit == Decimal("43.50")
+    assert lot.current_price == Decimal("9.80")
+    assert lot.status == "可卖"
+
+
+def test_calculate_open_grid_lots_reports_not_reached_and_missing_quote_statuses():
+    today = date(2026, 7, 9)
+    trades = [
+        make_trade(trade_id=1, trade_date=today, side=TradeSide.BUY, price="10.00", quantity=100),
+    ]
+
+    [not_reached] = calculate_open_grid_lots(
+        trades,
+        spacing=Decimal("0.03"),
+        current_price=Decimal("10.20"),
+        as_of=today,
+    )
+    [missing_quote] = calculate_open_grid_lots(
+        trades,
+        spacing=Decimal("0.03"),
+        current_price=None,
+        as_of=today,
+    )
+
+    assert not_reached.suggested_sell_price == Decimal("10.30")
+    assert not_reached.status == "未到价"
+    assert missing_quote.current_price is None
+    assert missing_quote.status == "未刷新行情"

tests/test_services.py

@@ -258,3 +258,43 @@ def test_service_returns_empty_grid_levels_without_realtime_price(tmp_path):
     instrument = service.add_instrument(Instrument(id=None, code="510300", name="沪深300ETF", market="ETF"))
 
     assert service.get_grid_level_suggestions(instrument.id, levels=10) == []
+
+
+def test_service_returns_open_grid_lots_with_suggested_sell_price(tmp_path):
+    service = TradingService(tmp_path / "grid.db", quote_provider=FakeQuoteProvider())
+    service.ensure_defaults()
+    account = service.get_active_account()
+    instrument = service.add_instrument(Instrument(id=None, code="510300", name="沪深300ETF", market="ETF"))
+    service.save_trade(
+        Trade(
+            id=None,
+            account_id=account.id,
+            instrument_id=instrument.id,
+            trade_date=date(2026, 7, 7),
+            side=TradeSide.BUY,
+            price=Decimal("4.00"),
+            quantity=1000,
+            trade_group=TradeGroup.GRID,
+        )
+    )
+    service.save_trade(
+        Trade(
+            id=None,
+            account_id=account.id,
+            instrument_id=instrument.id,
+            trade_date=date(2026, 7, 8),
+            side=TradeSide.SELL,
+            price=Decimal("4.12"),
+            quantity=400,
+            trade_group=TradeGroup.GRID,
+        )
+    )
+    service.refresh_quotes()
+
+    [lot] = service.get_open_grid_lots(instrument.id, as_of=date(2026, 7, 9))
+
+    assert lot.buy_price == Decimal("4.00")
+    assert lot.remaining_quantity == 600
+    assert lot.suggested_sell_price == Decimal("4.12")
+    assert lot.current_price == Decimal("4.12")
+    assert lot.status == "可卖"

tests/test_ui.py

@@ -55,6 +55,26 @@ def test_main_window_contains_grid_level_table(tmp_path, monkeypatch):
     app.processEvents()
 
 
+def test_main_window_contains_open_grid_lots_table(tmp_path, monkeypatch):
+    monkeypatch.setenv("QT_QPA_PLATFORM", "offscreen")
+
+    from PySide6.QtWidgets import QApplication, QGroupBox
+
+    from grid_trading.services.trading_service import TradingService
+    from grid_trading.ui.main_window import MainWindow
+
+    app = QApplication.instance() or QApplication([])
+    service = TradingService(tmp_path / "grid.db")
+    window = MainWindow(service)
+
+    assert window.open_grid_lots_table.columnCount() == 8
+    assert any(group.title() == "待卖网格" for group in window.findChildren(QGroupBox))
+
+    window.close()
+    service.close()
+    app.processEvents()
+
+
 def test_instrument_dialog_does_not_collect_manual_current_price(monkeypatch):
     monkeypatch.setenv("QT_QPA_PLATFORM", "offscreen")