fix(order): stabilize zustand selector snapshots

Move filter-based derivations out of Zustand selectors in order/chat/review detail pages so snapshots stay stable under useSyncExternalStore checks. Add evidence-backed comments referencing React useSyncExternalStore guidance and Zustand issues #1936/#3155 to document the regression trigger.

app/(order)/order/[id]/page.tsx

@@ -2,7 +2,7 @@
 
 import { ArrowLeft, CheckCircle, Clock, Star } from "lucide-react"
 import Link from "next/link"
-import { use, useEffect, useState } from "react"
+import { use, useEffect, useMemo, useState } from "react"
 import OrderActions from "@/components/order-actions"
 import { Badge } from "@/components/ui/badge"
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
@@ -37,7 +37,12 @@ export default function OrderDetailPage({ params }: { params: Promise<{ id: stri
   const order = useOrderStore((state) => state.orders.find((item) => item.id === id))
   const sessions = useChatStore((state) => state.sessions)
   const ensureOrderSession = useChatStore((state) => state.ensureOrderSession)
-  const reviews = useReviewStore((state) => state.reviews.filter((item) => item.orderId === id))
+  const allReviews = useReviewStore((state) => state.reviews)
+  // Filtering is deferred to useMemo after reading the raw store array.
+  // Zustand v5 compares selector outputs by reference stability.
+  // Returning a fresh filtered array from the selector can re-trigger updates
+  // and loop under useSyncExternalStore (pmndrs/zustand#1936, #3155).
+  const reviews = useMemo(() => allReviews.filter((item) => item.orderId === id), [allReviews, id])
   const [nowTs, setNowTs] = useState(Date.now())
 
   useEffect(() => {