fix(ui): показывать свежесть GRE и закреплять экспорт

app/(main)/gre/page.tsx

@@ -231,6 +231,9 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
   const [failures, setFailures] = useState<z.infer<typeof greResponseSchema>["failures"]>([])
   const failedServerIds = useMemo(() => failures.map(f => f.serverId), [failures])
   const [hasLoaded, setHasLoaded] = useState(false)
+  const [readReceipt, setReadReceipt] = useState<Record<string, string>>({})
+  const [responseReceipt, setResponseReceipt] = useState<string | null>(null)
+  const [writeReceipt, setWriteReceipt] = useState<{ serverId: string; at: string } | null>(null)
   const loadEpoch = useRef(0)
   const mounted = useRef(true)
   const operationLock = useRef(false)
@@ -264,6 +267,7 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
   const [historyRestoring, setHistoryRestoring] = useState(false)
   const [poolOpen,        setPoolOpen]        = useState(false)
   const [codePreviewTunnel, setCodePreviewTunnel] = useState<GreTunnel | null>(null)
+  const [exportContext, setExportContext] = useState<{ servers: Record<string, Server>; at: string | null; stale: boolean; mock: boolean } | null>(null)
 
   const [tForm, setTForm] = useState(defaultTunnelForm)
   const [pForm, setPForm] = useState(defaultPoolForm)
@@ -289,6 +293,9 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
       setLiveTunnels(previous => [...response.data.tunnels, ...previous.filter(t => failedIds.has(t.serverId) && enabledIds.has(t.serverId))])
       setFailures(response.data.failures)
       setHasLoaded(true)
+      const at = new Date().toISOString()
+      setResponseReceipt(at)
+      setReadReceipt(previous => Object.fromEntries([...enabledIds].map(id => [id, failedIds.has(id) ? previous[id] : at]).filter((entry): entry is [string, string] => !!entry[1])))
       setDataError(null)
       setLiveStale(false)
     } catch (e) {
@@ -400,6 +407,7 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
       )
       if (!mounted.current) return
       if (res?.ok !== true) throw new Error("Сервер не подтвердил восстановление")
+      setWriteReceipt({ serverId: historyServerId, at: new Date().toISOString() })
       toast.success("Версия применена на роутер")
       await loadLive(true)
       if (mounted.current) await loadRevisions()
@@ -464,6 +472,7 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
         })
         if (!mounted.current) return
         if (result?.ok !== true) throw new Error("Сервер не подтвердил сохранение туннеля")
+        setWriteReceipt({ serverId: tForm.serverId, at: new Date().toISOString() })
         toast.success(`Туннель ${tForm.name} обновлён`)
       } else {
         const result = await apiFetch<unknown>("/api/gre/tunnels", {
@@ -479,6 +488,7 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
            "enabled" in result && result.enabled === tForm.enabled)
         )
         if (!confirmed) throw new Error("Сервер не подтвердил создание туннеля")
+        setWriteReceipt({ serverId: tForm.serverId, at: new Date().toISOString() })
         toast.success(`Туннель ${tForm.name} создан`)
       }
       setTunnelOpen(false)
@@ -510,6 +520,7 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
       })
       if (!mounted.current) return
       if (result?.ok !== true) throw new Error("Сервер не подтвердил изменение туннеля")
+      setWriteReceipt({ serverId: t.serverId, at: new Date().toISOString() })
       toast.success(t.enabled ? `Выключен ${t.name}` : `Включён ${t.name}`)
       await loadLive(true)
     } catch (err) {
@@ -533,6 +544,7 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
       })
       if (!mounted.current) return
       if (result?.ok !== true) throw new Error("Сервер не подтвердил удаление туннеля")
+      setWriteReceipt({ serverId: t.serverId, at: new Date().toISOString() })
       toast.success(`Удалён ${t.name}`)
       setPendingDelete(null)
       await loadLive(true)
@@ -615,9 +627,16 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
     { value: "plain", label: "Без IPsec", count: scopedTunnels.length - scopedIpsecCount },
   ]
 
+  function openCodePreview(t: GreTunnel) {
+    setCodePreviewTunnel(t)
+    setExportContext({ servers: serverById, at: readReceipt[t.serverId] ?? null, stale: isLive && (!hasLoaded || !!dataError || failedServerIds.includes(t.serverId)), mock: !isLive })
+  }
+  const scopeReceipt = selectedServerId === ALL_SERVERS_ID ? responseReceipt : readReceipt[selectedServerId]
+  const formatReceipt = (at: string) => new Date(at).toLocaleString("ru-RU")
+
   const greExportCode = useMemo(
-    () => (codePreviewTunnel ? generateRosCommands(codePreviewTunnel, serverById) : ""),
-    [codePreviewTunnel, serverById],
+    () => (codePreviewTunnel ? generateRosCommands(codePreviewTunnel, exportContext?.servers ?? {}) : ""),
+    [codePreviewTunnel, exportContext],
   )
 
   return (
@@ -744,6 +763,11 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
             ]}
           />
 
+          <div role="group" aria-label="Свежесть GRE" className="flex flex-wrap gap-x-5 gap-y-1 text-xs text-muted-foreground">
+            <span data-source-time="read">{isLive ? selectedServerId === ALL_SERVERS_ID ? "Ответ каталога: " : "Опрос устройства: " : "Моковые данные · "}{isLive ? scopeReceipt ? <time dateTime={scopeReceipt} title="Время получения ответа браузером; не время измерения RouterOS">{formatReceipt(scopeReceipt)}</time> : "неизвестно" : "не получены с RouterOS"}</span>
+            {isLive && writeReceipt && (selectedServerId === ALL_SERVERS_ID || writeReceipt.serverId === selectedServerId) && <span data-source-time="write">API подтвердил изменение · {serverById[writeReceipt.serverId]?.name ?? writeReceipt.serverId}: <time dateTime={writeReceipt.at}>{formatReceipt(writeReceipt.at)}</time></span>}
+          </div>
+
           {toggleStatus && <p role="status" className="text-sm text-muted-foreground">{toggleStatus}</p>}
           {toggleError && <p role="alert" className="text-sm text-destructive">{toggleError}</p>}
 
@@ -780,7 +804,7 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
                 tunnels={filtered}
                 servers={displayServers}
                 pools={displayPools}
-                onCodePreview={setCodePreviewTunnel}
+                onCodePreview={openCodePreview}
                 onEdit={openEditTunnel}
                 onToggle={(t) => { void toggleTunnel(t) }}
                 onDelete={setPendingDelete}
@@ -864,7 +888,7 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
         open={!!codePreviewTunnel}
         onClose={() => setCodePreviewTunnel(null)}
         title={codePreviewTunnel?.name ?? "GRE"}
-        description="Команды RouterOS 7.20+ для создания туннеля"
+        description={exportContext?.mock ? "Моковый снимок · данные не получены с RouterOS" : `Снимок на момент открытия · ${exportContext?.at ? formatReceipt(exportContext.at) : "время получения неизвестно"} · ${exportContext?.stale ? "актуальность не подтверждена" : "последний успешный опрос"}`}
         formats={[
           {
             id: "rsc",
@@ -877,11 +901,11 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
           codePreviewTunnel ? (
             <div className="flex flex-wrap gap-3 text-xs shrink-0">
               <span className="flex items-center gap-1.5">
-                <span className={`size-1.5 rounded-full ${greStatusMeta(codePreviewTunnel.status).dot}`} />
-                {greStatusMeta(codePreviewTunnel.status).label}
+                <span className={`size-1.5 rounded-full ${exportContext?.stale ? "bg-muted-foreground" : greStatusMeta(codePreviewTunnel.status).dot}`} />
+                {exportContext?.stale ? "Неизвестно" : greStatusMeta(codePreviewTunnel.status).label}
               </span>
               <span className="text-muted-foreground">·</span>
-              <span>{serverById[codePreviewTunnel.serverId]?.name}</span>
+              <span>{exportContext?.servers[codePreviewTunnel.serverId]?.name}</span>
               <span className="text-muted-foreground">·</span>
               <span className="font-mono">
                 {codePreviewTunnel.localAddress === "0.0.0.0" ? "авто" : codePreviewTunnel.localAddress}