fix(ui): проверять ревизии и сохранять ошибки истории

app/(main)/gre/page.tsx

@@ -1,6 +1,6 @@
 "use client"
 
-import { Suspense, useCallback, useEffect, useMemo, useState } from "react"
+import { Suspense, useCallback, useEffect, useRef, useMemo, useState } from "react"
 import Link from "next/link"
 import { useRouter, useSearchParams } from "next/navigation"
 import { Alert, AlertTitle, AlertDescription } from "@/components/reui/alert"
@@ -21,7 +21,7 @@ import { OpsPanel } from "@/components/ops-panel"
 import { Button } from "@/components/ui/button"
 import { Input } from "@/components/ui/input"
 import { ConfigHistorySheet } from "@/components/config-history-sheet"
-import type { ConfigRevisionDto } from "@/lib/config-revisions"
+import { parseConfigRevisions, type ConfigRevisionDto } from "@/lib/config-revisions"
 import {
   AlertDialog,
   AlertDialogAction,
@@ -280,6 +280,8 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
   const [historyOpen,     setHistoryOpen]     = useState(false)
   const [revisions,       setRevisions]       = useState<ConfigRevisionDto[]>([])
   const [historyLoading,  setHistoryLoading]  = useState(false)
+  const [historyError, setHistoryError] = useState<string | null>(null)
+  const historyEpoch = useRef(0)
   const [historyRestoring, setHistoryRestoring] = useState(false)
   const [poolOpen,        setPoolOpen]        = useState(false)
   const [codePreviewTunnel, setCodePreviewTunnel] = useState<GreTunnel | null>(null)
@@ -373,19 +375,24 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
   const historyServerId = selectedServerId === ALL_SERVERS_ID ? null : selectedServerId
   const mutationsLocked = isLive && (mutateBusy || liveStale || selectedTunnelError || historyRestoring)
 
+  useEffect(() => () => { historyEpoch.current += 1 }, [historyServerId, backendUrl, isLive])
+
   const loadRevisions = useCallback(async () => {
     if (!isLive || !historyServerId) return
+    const epoch = ++historyEpoch.current
     setHistoryLoading(true)
+    setHistoryError(null)
     try {
-      const res = await apiFetch<{ revisions: ConfigRevisionDto[] }>(
+      const res = await apiFetch<unknown>(
         `/api/gre/revisions?serverId=${encodeURIComponent(historyServerId)}`,
       )
-      setRevisions(res.revisions)
-    } catch (err) {
-      toast.error("Не удалось загрузить историю", { description: String(err) })
-      setRevisions([])
+      if (epoch !== historyEpoch.current) return
+      setRevisions(parseConfigRevisions(res, historyServerId, "gre"))
+    } catch (error) {
+      if (epoch !== historyEpoch.current) return
+      setHistoryError(error instanceof Error ? error.message : "Не удалось загрузить историю")
     } finally {
-      setHistoryLoading(false)
+      if (epoch === historyEpoch.current) setHistoryLoading(false)
     }
   }, [isLive, historyServerId, apiFetch])
 
@@ -1073,7 +1080,9 @@ function GrePageContent({ selectedServerId, selectedTunnelId, allTunnelsHref, on
 
       <ConfigHistorySheet
         open={historyOpen}
-        onOpenChange={setHistoryOpen}
+        onOpenChange={v => { if (!v) historyEpoch.current += 1; setHistoryOpen(v) }}
+        loadError={historyError}
+        onRetry={() => { void loadRevisions() }}
         title="История GRE"
         itemLabel="туннелей"
         revisions={revisions}