fix(ui): защитить экспорт WireGuard от устаревших ответов

app/(main)/wireguard/page.tsx

@@ -217,6 +217,9 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
     peerConf?: string
   } | null>(null)
   const [exportBusy, setExportBusy] = useState(false)
+  const exportEpoch = useRef(0)
+  const exportPending = useRef<number | null>(null)
+  useEffect(() => () => { exportEpoch.current += 1 }, [])
 
   const loadLive = useCallback(async () => {
     if (!isLive) return
@@ -593,7 +596,9 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
   }
 
   async function handleLiveExport(format: "rsc" | "conf" | "peer-conf") {
-    if (!exportIface || !isLive) return
+    if (!exportIface || !isLive || exportPending.current !== null) return
+    const epoch = exportEpoch.current
+    exportPending.current = epoch
     setExportBusy(true)
     try {
       const res = await exportWireGuard(backendUrl, {
@@ -603,6 +608,7 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
         includePrivateKey: format !== "peer-conf",
         peerId: format === "peer-conf" ? (exportPeerId ?? undefined) : undefined,
       })
+      if (epoch !== exportEpoch.current) return
       setLiveExport((prev) => ({
         ...prev,
         ...(format === "rsc"
@@ -613,13 +619,20 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
       }))
       toast.success("Конфиг загружен с роутера")
     } catch (e) {
+      if (epoch !== exportEpoch.current) return
       toast.error(e instanceof Error ? e.message : "Ошибка экспорта")
     } finally {
-      setExportBusy(false)
+      if (epoch === exportEpoch.current) {
+        exportPending.current = null
+        setExportBusy(false)
+      }
     }
   }
 
   function openExport(iface: WgIfaceWithServer, tab: "rsc" | "conf" | "peer" = "rsc", peerId?: string) {
+    exportEpoch.current += 1
+    exportPending.current = null
+    setExportBusy(false)
     setLiveExport(null)
     setExportInitialTab(tab)
     setExportPeerId(peerId ?? null)
@@ -927,6 +940,9 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
         initialTab={exportInitialTab}
         peerId={exportPeerId}
         onClose={() => {
+          exportEpoch.current += 1
+          exportPending.current = null
+          setExportBusy(false)
           setExportIface(null)
           setExportPeerId(null)
           setExportInitialTab("rsc")