fix(selection): 列表仅展示单个 J 值

zhixing-web/src/features/selection/components/selection-presentation.ts

@@ -90,6 +90,14 @@ export function getSignalJValue(details: SelectionSignal["details"]) {
   return formatSignalDetailValue("j", details.j)
 }
 
+export function getStockJValue(stock: SelectionStockResult) {
+  const signal = stock.signals.find(
+    ({ details }) =>
+      details.j !== null && details.j !== undefined && details.j !== "",
+  )
+  return getSignalJValue(signal?.details ?? {})
+}
+
 function formatSignalDetailValue(
   key: string,
   value: number | string | null | undefined,

zhixing-web/src/features/selection/components/signal-record-list.tsx

@@ -8,7 +8,7 @@ import { PatternScoreDetails, PatternScoreSummary } from "./pattern-score"
 import {
   categoryToneClass,
   getCategoryLabel,
-  getSignalJValue,
+  getStockJValue,
   getStockKey,
 } from "./selection-presentation"
 import { SignalDetails } from "./signal-details"
@@ -77,9 +77,7 @@ export function SignalRecordList({
                 <span className="text-xs tabular-nums text-muted-foreground">
                   J&nbsp;
                   <strong className="font-semibold text-foreground">
-                    {stock.signals
-                      .map((signal) => getSignalJValue(signal.details))
-                      .join(" / ")}
+                    {getStockJValue(stock)}
                   </strong>
                 </span>
                 <Button

zhixing-web/src/features/selection/components/signal-table.tsx

@@ -7,7 +7,7 @@ import { PatternScoreSummary } from "./pattern-score"
 import {
   categoryToneClass,
   getCategoryLabel,
-  getSignalJValue,
+  getStockJValue,
   getStockKey,
 } from "./selection-presentation"
 
@@ -81,11 +81,7 @@ export function SignalTable({
                     <PatternScoreSummary score={stock.score} />
                   </td>
                   <td className="px-3 text-right align-middle font-semibold tabular-nums text-foreground">
-                    {stock.signals.map((signal) => (
-                      <span key={signal.category} className="block">
-                        {getSignalJValue(signal.details)}
-                      </span>
-                    ))}
+                    {getStockJValue(stock)}
                   </td>
                   <td className="px-3 text-right align-middle font-medium tabular-nums text-foreground">
                     ¥ {stock.close.toFixed(2)}