fix: ranking reorders persist across all admin sessions

Apply saved reordersJson when initializing the dashboard so any admin
sees the latest drag-reorder state, not just the original AI order.
The latest reorder event per category is used as the initial localOrder.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/admin/round/ranking-dashboard.tsx

@@ -406,15 +406,28 @@ export function RankingDashboard({ competitionId: _competitionId, roundId }: Ran
     if (!initialized.current && snapshot) {
       const startup = (snapshot.startupRankingJson ?? []) as unknown as RankedProjectEntry[]
       const concept = (snapshot.conceptRankingJson ?? []) as unknown as RankedProjectEntry[]
-      setLocalOrder({
-        STARTUP: startup.map((r) => r.projectId),
-        BUSINESS_CONCEPT: concept.map((r) => r.projectId),
-      })
-      // Track original order for override detection (same effect = always in sync)
+
+      // Track original AI order for override detection (same effect = always in sync)
       const order: Record<string, number> = {}
       startup.forEach((r, i) => { order[r.projectId] = i + 1 })
       concept.forEach((r, i) => { order[r.projectId] = i + 1 })
       setSnapshotOrder(order)
+
+      // Apply saved reorders so the ranking persists across all admin sessions.
+      // reordersJson is append-only — the latest event per category is the current order.
+      const reorders = (snapshot.reordersJson as Array<{
+        category: 'STARTUP' | 'BUSINESS_CONCEPT'
+        orderedProjectIds: string[]
+      }> | null) ?? []
+
+      const latestStartupReorder = [...reorders].reverse().find((r) => r.category === 'STARTUP')
+      const latestConceptReorder = [...reorders].reverse().find((r) => r.category === 'BUSINESS_CONCEPT')
+
+      setLocalOrder({
+        STARTUP: latestStartupReorder?.orderedProjectIds ?? startup.map((r) => r.projectId),
+        BUSINESS_CONCEPT: latestConceptReorder?.orderedProjectIds ?? concept.map((r) => r.projectId),
+      })
+
       initialized.current = true
     }
   }, [snapshot])