fix(ui): сохранить историю скорости при частичном сбое

app/(main)/uptime/page.tsx

@@ -1106,6 +1106,8 @@ function UptimePageContent({ selectedProbeId, allProbesHref }: { selectedProbeId
   const [speedError, setSpeedError] = useState<string | null>(null)
   const [speedRuns, setSpeedRuns] = useState<SpeedTestRun[]>([])
   const [speedProbes, setSpeedProbes] = useState<SpeedProbeRow[]>([])
+  const speedReadRevision = useRef(0)
+  const [speedReads, setSpeedReads] = useState<Record<"probes" | "history", { receivedAt: number | null; error: string | null }>>({ probes: { receivedAt: null, error: null }, history: { receivedAt: null, error: null } })
   const [speedIfaces, setSpeedIfaces] = useState<Record<string, Array<{ name: string; running: boolean; disabled: boolean; addresses: string[] }>>>({})
   const [speedCollapsed, setSpeedCollapsed] = useState<Set<string>>(new Set())
   const [speedSheetOpen, setSpeedSheetOpen] = useState(false)
@@ -1182,40 +1184,49 @@ function UptimePageContent({ selectedProbeId, allProbesHref }: { selectedProbeId
       afterBtPing?: { rttMs: number | null; lossPct: number | null; error: string | null } | null
       createdAt: string
     }
-    try {
-      const [sp, runsRes] = await Promise.all([
-        apiFetch<{ probes: SpeedProbeRow[] }>("/api/uptime/speed-probes"),
-        apiFetch<{ runs: RunRow[] }>("/api/uptime/speed-test/runs"),
-      ])
-      if (context !== saveContext.current || (savingRef.current && writeContext !== context)) return
-      setSpeedProbes(sp.probes ?? [])
-      const rows = (runsRes.runs ?? []).map((r) => ({
-        id: r.id,
-        startedAt: Date.parse(r.createdAt),
-        srcServerId: r.srcServerId,
-        dstServerId: r.dstServerId,
-        srcInterface: r.srcInterface || undefined,
-        dstInterface: r.dstInterface || undefined,
-        protocol: r.protocol,
-        direction: r.direction,
-        durationSec: r.durationSec,
-        txAvgMbps: Math.round(r.txAvgMbps ?? 0),
-        rxAvgMbps: Math.round(r.rxAvgMbps ?? 0),
-        status: (r.status === "error" ? "error" : "done") as "error" | "done",
-        command: "",
-        lines: r.error ? [`status: error`, r.error] : [],
-        afterBtPing: r.afterBtPing ?? null,
-        srcAddress: r.srcAddress ?? null,
-        dstAddress: r.dstAddress ?? null,
-        srcInterfaceAddress: r.srcInterfaceAddress ?? null,
-        dstInterfaceAddress: r.dstInterfaceAddress ?? null,
-      }))
-      setSpeedRuns(rows)
-    } catch {
-      if (context !== saveContext.current || (savingRef.current && writeContext !== context)) return
-      setSpeedProbes([])
-      setSpeedRuns([])
+    const revision = ++speedReadRevision.current
+    const current = () => revision === speedReadRevision.current && context === saveContext.current && (!savingRef.current || writeContext === context)
+    const read = async (resource: "probes" | "history", task: () => Promise<void>) => {
+      try {
+        await task()
+        if (current()) setSpeedReads(previous => ({ ...previous, [resource]: { receivedAt: Date.now(), error: null } }))
+      } catch (error) {
+        if (current()) setSpeedReads(previous => ({ ...previous, [resource]: { ...previous[resource], error: serverOperationError(error) } }))
+      }
     }
+    await Promise.all([
+      read("probes", async () => {
+        const sp = await apiFetch<{ probes: SpeedProbeRow[] }>("/api/uptime/speed-probes")
+        if (!Array.isArray(sp.probes)) throw new Error("Некорректный список speed-проб")
+        if (current()) setSpeedProbes(sp.probes)
+      }),
+      read("history", async () => {
+        const runsRes = await apiFetch<{ runs: RunRow[] }>("/api/uptime/speed-test/runs")
+        if (!Array.isArray(runsRes.runs)) throw new Error("Некорректная история тестов")
+        const rows = (runsRes.runs ?? []).map((r) => ({
+          id: r.id,
+          startedAt: Date.parse(r.createdAt),
+          srcServerId: r.srcServerId,
+          dstServerId: r.dstServerId,
+          srcInterface: r.srcInterface || undefined,
+          dstInterface: r.dstInterface || undefined,
+          protocol: r.protocol,
+          direction: r.direction,
+          durationSec: r.durationSec,
+          txAvgMbps: Math.round(r.txAvgMbps ?? 0),
+          rxAvgMbps: Math.round(r.rxAvgMbps ?? 0),
+          status: (r.status === "error" ? "error" : "done") as "error" | "done",
+          command: "",
+          lines: r.error ? [`status: error`, r.error] : [],
+          afterBtPing: r.afterBtPing ?? null,
+          srcAddress: r.srcAddress ?? null,
+          dstAddress: r.dstAddress ?? null,
+          srcInterfaceAddress: r.srcInterfaceAddress ?? null,
+          dstInterfaceAddress: r.dstInterfaceAddress ?? null,
+        }))
+        if (current()) setSpeedRuns(rows)
+      }),
+    ])
   }, [apiFetch, liveApi])
 
   const refreshUptimeLive = useCallback(async (opts?: { showSpinner?: boolean; pollDevices?: boolean }) => {
@@ -2097,7 +2108,15 @@ function UptimePageContent({ selectedProbeId, allProbesHref }: { selectedProbeId
         {/* ── speed tab ── */}
         {tab === "speed" && (
           <div className="flex flex-col gap-0">
-
+            {liveApi && <div className="px-6 py-3 space-y-2">
+              {(["probes", "history"] as const).map(resource => {
+                const state = speedReads[resource], label = resource === "probes" ? "Speed-пробы" : "История тестов"
+                return <div key={resource}>
+                  <p role="status" className="text-xs text-muted-foreground">{label}: {state.receivedAt ? "получено " + new Date(state.receivedAt).toLocaleString("ru-RU") : "данные пока неизвестны"}</p>
+                  {state.error && <ContextAlert variant="warning" aria-label={"Чтение скорости: " + resource}><ContextTitle>{label}</ContextTitle><ContextDescription>{state.error} {state.receivedAt ? "Последние данные сохранены." : "Данные пока неизвестны."}</ContextDescription></ContextAlert>}
+                </div>
+              })}
+            </div>}
             {/* ── KPI strip ── */}
             {(() => {
               const doneRuns  = speedRuns.filter(r => r.status === "done")
@@ -2112,14 +2131,14 @@ function UptimePageContent({ selectedProbeId, allProbesHref }: { selectedProbeId
                       {
                         id: "probes",
                         label: "Speed-пробы",
-                        value: `${speedProbes.length} шт`,
+                        value: liveApi && !speedReads.probes.receivedAt ? "—" : `${speedProbes.length} шт`,
                         icon: <ArrowUpDownIcon className="size-4" />,
                         iconClassName: "text-muted-foreground",
                       },
                       {
                         id: "runs",
                         label: "Тестов выполнено",
-                        value: `${doneRuns.length} run`,
+                        value: liveApi && !speedReads.history.receivedAt ? "—" : `${doneRuns.length} run`,
                         hint: runningCnt > 0 ? `${runningCnt} выполняется` : undefined,
                         icon: <PlayIcon className="size-4" />,
                         iconClassName: runningCnt > 0 ? "text-warning" : "text-muted-foreground",
@@ -2158,7 +2177,7 @@ function UptimePageContent({ selectedProbeId, allProbesHref }: { selectedProbeId
             <div className="flex-1 overflow-y-auto p-6 flex flex-col gap-4">
 
               {/* ── empty state ── */}
-              {speedGrouped.length === 0 && (
+              {speedGrouped.length === 0 && (!liveApi || speedReads.probes.receivedAt !== null) && (
                 <div className="flex flex-col items-center justify-center py-16 gap-3 text-center">
                   <div className="size-12 rounded-full bg-muted flex items-center justify-center">
                     <ArrowUpDownIcon className="size-5 text-muted-foreground" />