fix(ui): подтверждать переключение интерфейсов WireGuard

app/(main)/wireguard/page.tsx

@@ -186,6 +186,9 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
   const [loading, setLoading] = useState(true)
   const [loadError, setLoadError] = useState(false)
   const [busy, setBusy] = useState(false)
+  const toggleLock = useRef(false)
+  const [togglePending, setTogglePending] = useState<string | null>(null)
+  const [toggleError, setToggleError] = useState<string | null>(null)
 
   const [workspaceTab, setWorkspaceTab] = useState<WgWorkspaceTab>("interfaces")
   const [statusFilter, setStatusFilter] = useState<WgStatusFilter>("all")
@@ -492,19 +495,28 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
   }
 
   async function handleToggle(iface: WgIfaceWithServer) {
+    if (toggleLock.current) return
     if (sourceUnavailable(iface.serverId)) return
     if (!isLive || !iface.rosId) {
       toast.info("Доступно только в live-режиме")
       return
     }
+    toggleLock.current = true
+    const context = `${iface.name} · ${iface.serverName}`
+    setTogglePending(context)
+    setToggleError(null)
     try {
-      await patchWireGuardInterface(backendUrl, iface.serverId, iface.rosId, {
+      const result = await patchWireGuardInterface(backendUrl, iface.serverId, iface.rosId, {
         disabled: iface.enabled,
       })
+      if (result?.ok !== true) throw new Error("Сервер не подтвердил изменение интерфейса")
       toast.success(iface.enabled ? "Отключено" : "Включено")
       await loadLive()
     } catch (e) {
-      toast.error(e instanceof Error ? e.message : "Ошибка")
+      setToggleError(`${context}: ${e instanceof Error ? e.message : "Ошибка переключения"}`)
+    } finally {
+      toggleLock.current = false
+      setTogglePending(null)
     }
   }
 
@@ -690,6 +702,8 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
                 </AlertDescription>
               </Alert>
             )}
+            {togglePending && <p role="status" className="text-sm text-muted-foreground">Изменение интерфейса {togglePending}…</p>}
+            {toggleError && <p role="alert" className="text-sm text-destructive">{toggleError}</p>}
             <KpiStatGrid
               aria-label="Сводка WireGuard"
               items={[
@@ -788,6 +802,7 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
                     onExport={(iface) => openExport(iface, "rsc")}
                     onAddPeer={selectedSourceError ? undefined : iface => { setPeerError(null); setPeerIface(iface) }}
                     onToggle={selectedSourceError ? undefined : handleToggle}
+                    toggleBusy={togglePending !== null}
                     onDelete={selectedSourceError ? undefined : (iface) => setPendingDelete({ kind: "iface", iface })}
                     onDeletePeer={selectedSourceError ? undefined : (iface, peerId) => setPendingDelete({ kind: "peer", iface, peerId })}
                     onExportPeer={(iface, peerId) => openExport(iface, "peer", peerId)}