fix(ui): защитить форму импорта WireGuard во время запроса

app/(main)/wireguard/page.tsx

@@ -192,6 +192,8 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
   const [search, setSearch] = useState("")
   const [createOpen, setCreateOpen] = useState(false)
   const [importOpen, setImportOpen] = useState(false)
+  const importLock = useRef(false)
+  const [importError, setImportError] = useState<string | null>(null)
   const [exportIface, setExportIface] = useState<WgIfaceWithServer | null>(null)
   const [exportInitialTab, setExportInitialTab] = useState<"rsc" | "conf" | "peer">("rsc")
   const [exportPeerId, setExportPeerId] = useState<string | null>(null)
@@ -443,10 +445,13 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
     format: "auto" | "rsc" | "conf"
     dryRun: boolean
   }) {
+    if (importLock.current) return
     if (!isLive) {
       toast.info("Импорт на роутер доступен только в live-режиме")
       return
     }
+    importLock.current = true
+    setImportError(null)
     setBusy(true)
     try {
       const res = await importWireGuard(backendUrl, {
@@ -467,8 +472,9 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
       setImportOpen(false)
       await loadLive()
     } catch (e) {
-      toast.error(e instanceof Error ? e.message : "Ошибка импорта")
+      setImportError(e instanceof Error ? e.message : "Ошибка импорта")
     } finally {
+      importLock.current = false
       setBusy(false)
     }
   }
@@ -647,7 +653,7 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
                 </Button>
                 </>
               )}
-              <Button size="sm" variant="outline" onClick={() => setImportOpen(true)}>
+              <Button size="sm" variant="outline" onClick={() => { setImportError(null); setImportOpen(true) }}>
                 <UploadIcon className="size-4" />
                 Импорт
               </Button>
@@ -874,7 +880,8 @@ function WireGuardPageContent({ selectedServerId, selectedInterfaceId, allInterf
       />
       <WgImportSheet
         open={importOpen}
-        onOpenChange={setImportOpen}
+        onOpenChange={v => { if (!importLock.current) setImportOpen(v) }}
+        error={importError}
         servers={serverOptions}
         defaultServerId={sheetServerId}
         busy={busy}