feat(selection): add Zhixing line indicators to selection chart and update related components

zhixing-server/tests/test_selection_http.py

@@ -133,6 +133,8 @@ class FakeChartService:
                     k=52.0,
                     d=48.0,
                     j=60.0,
+                    trend_white=10.2,
+                    trend_yellow=10.4,
                 ),
             ),
         )
@@ -451,6 +453,8 @@ def test_chart_returns_bounded_qfq_contract() -> None:
                 "k": 52.0,
                 "d": 48.0,
                 "j": 60.0,
+                "trend_white": 10.2,
+                "trend_yellow": 10.4,
             }
         ],
     }

zhixing-server/tests/unit/selection/test_chart.py

@@ -9,7 +9,10 @@ from zhixing_server.modules.selection.application.chart import (
     GetSelectionChart,
     SelectionChartNotFound,
 )
-from zhixing_server.modules.selection.domain.indicators import compute_kdj
+from zhixing_server.modules.selection.domain.indicators import (
+    compute_kdj,
+    compute_zhixing_lines,
+)
 from zhixing_server.modules.selection.domain.models import SelectionBar, StockHistory
 
 
@@ -61,9 +64,12 @@ def test_chart_computes_on_full_history_before_returning_last_250_points() -> No
         }
     )
     expected = compute_kdj(frame).iloc[-1]
+    expected_white, expected_yellow = compute_zhixing_lines(frame["close"])
     assert chart.points[-1].k == pytest.approx(float(expected["K"]))
     assert chart.points[-1].d == pytest.approx(float(expected["D"]))
     assert chart.points[-1].j == pytest.approx(float(expected["J"]))
+    assert chart.points[-1].trend_white == pytest.approx(float(expected_white.iloc[-1]))
+    assert chart.points[-1].trend_yellow == pytest.approx(float(expected_yellow.iloc[-1]))
 
 
 def test_chart_filters_future_rows_and_preserves_nullable_points() -> None: