feat(selection): show stock industry and concept boards in detail panel

Add point-in-time stock membership lookup to the sector radar module
(GET /sector-radar/stocks/{ts_code}/membership) reading the existing
dc_index/dc_member snapshots, and surface industries plus concept chips
in the selection signal detail panel with graceful no-data hiding.

zhixing-web/src/features/selection/components/signal-detail-panel.tsx

@@ -1,5 +1,6 @@
 import { lazy, Suspense } from "react"
 import { Search } from "lucide-react"
+import { useStockSectorMembership } from "@/features/sector-radar/api/sector-radar.query"
 import { useSelectionChart } from "../api/selection.query"
 
 import { Card } from "@/shared/ui/card"
@@ -18,6 +19,8 @@ const SelectionChart = lazy(() =>
   })),
 )
 
+const displayedConceptCount = 8
+
 interface SignalDetailPanelProps {
   stock: SelectionStockResult | undefined
 }
@@ -28,6 +31,10 @@ export function SignalDetailPanel({ stock }: SignalDetailPanelProps) {
     stock?.target_trade_date,
     stock?.strategy,
   )
+  const membershipQuery = useStockSectorMembership(
+    stock?.ts_code,
+    stock?.target_trade_date,
+  )
 
   if (!stock) {
     return (
@@ -63,6 +70,19 @@ export function SignalDetailPanel({ stock }: SignalDetailPanelProps) {
     },
   ]
 
+  const membership =
+    membershipQuery.data?.status === "success" ? membershipQuery.data : undefined
+  const industries = membership?.industries ?? []
+  const concepts = membership?.concepts ?? []
+  const extraConceptCount = Math.max(
+    0,
+    concepts.length - displayedConceptCount,
+  )
+  const sectorSnapshotTitle =
+    membership?.trade_date != null
+      ? `板块成分截至 ${membership.trade_date}`
+      : undefined
+
   return (
     <aside
       aria-label="当前股票详情"
@@ -117,6 +137,33 @@ export function SignalDetailPanel({ stock }: SignalDetailPanelProps) {
             ¥ {stock.close.toFixed(2)}
           </p>
 
+          {industries.length > 0 && (
+            <p className="mt-1 text-xs text-muted-foreground">
+              行业：{industries.map((industry) => industry.name).join("、")}
+            </p>
+          )}
+          {concepts.length > 0 && (
+            <div
+              className="mt-2 flex flex-wrap items-center gap-1"
+              title={sectorSnapshotTitle}
+            >
+              <span className="text-xs text-muted-foreground">板块</span>
+              {concepts.slice(0, displayedConceptCount).map((concept) => (
+                <span
+                  className="rounded bg-muted px-1.5 py-0.5 text-xs"
+                  key={concept.code}
+                >
+                  {concept.name}
+                </span>
+              ))}
+              {extraConceptCount > 0 && (
+                <span className="text-xs text-muted-foreground">
+                  等 {concepts.length} 个
+                </span>
+              )}
+            </div>
+          )}
+
           <dl className="mt-3 divide-y divide-border/60 border-y border-border/60 text-xs">
             {metricRows.map((row) => (
               <div