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

zhixing-server/src/zhixing_server/modules/selection/application/chart.py

@@ -9,7 +9,7 @@ from typing import Literal, cast
 
 import pandas as pd
 
-from ..domain.indicators import compute_kdj
+from ..domain.indicators import compute_kdj, compute_zhixing_lines
 from ..domain.ports import MarketDataReader
 
 SELECTION_CHART_LIMIT = 250
@@ -21,7 +21,7 @@ class SelectionChartNotFound(LookupError):
 
 @dataclass(frozen=True, slots=True)
 class SelectionChartPoint:
-    """One date-aligned OHLCV and KDJ point in the public chart vocabulary."""
+    """One date-aligned OHLCV, KDJ, and Zhixing-line point."""
 
     trade_date: date
     open: float | None
@@ -32,6 +32,8 @@ class SelectionChartPoint:
     k: float | None
     d: float | None
     j: float | None
+    trend_white: float | None
+    trend_yellow: float | None
 
 
 @dataclass(frozen=True, slots=True)
@@ -46,7 +48,7 @@ class SelectionChart:
 
 
 class GetSelectionChart:
-    """Load one qfq history, compute KDJ, then bound the response series."""
+    """Load one qfq history, compute KDJ and Zhixing lines, then bound the series."""
 
     def __init__(self, reader: MarketDataReader) -> None:
         """Inject the market-data reader owned by the selection context."""
@@ -54,7 +56,7 @@ class GetSelectionChart:
         self.reader = reader
 
     def execute(self, ts_code: str, target_trade_date: date) -> SelectionChart:
-        """Return at most 250 points without changing KDJ's full-history state.
+        """Return at most 250 points without changing full-history indicator state.
 
         Args:
             ts_code: Tushare stock identifier selected by the user.
@@ -83,6 +85,7 @@ class GetSelectionChart:
             }
         )
         kdj = compute_kdj(frame)
+        white, yellow = compute_zhixing_lines(frame["close"])
         start = max(0, len(bars) - SELECTION_CHART_LIMIT)
         points = tuple(
             SelectionChartPoint(
@@ -95,6 +98,8 @@ class GetSelectionChart:
                 k=_finite_or_none(kdj.iloc[index]["K"]),
                 d=_finite_or_none(kdj.iloc[index]["D"]),
                 j=_finite_or_none(kdj.iloc[index]["J"]),
+                trend_white=_finite_or_none(white.iloc[index]),
+                trend_yellow=_finite_or_none(yellow.iloc[index]),
             )
             for index, bar in enumerate(bars)
             if index >= start