fix(ui): открывать выбранный сервер из очереди проблем

app/(main)/servers/page.tsx

@@ -1,6 +1,8 @@
 "use client"
 
-import { useEffect, useMemo, useRef, useState } from "react"
+import { Suspense, useEffect, useMemo, useRef, useState } from "react"
+import Link from "next/link"
+import { useSearchParams } from "next/navigation"
 import { serverCreateSchema } from "@mmapp/contracts/servers"
 import { OperationGate, pollServers, serverOperationError, type PollResult } from "@/lib/server-operations"
 import { Alert, AlertTitle, AlertDescription } from "@/components/reui/alert"
@@ -218,12 +220,17 @@ type TypeFilter = "all" | ServerType
 type SheetMode = "add" | "edit"
 
 // ════════════════════════════════════════════════════════════════════════════
-export default function ServersPage() {
+function ServersPageContent() {
+  const searchParams = useSearchParams()
+  const selectedServerId = searchParams.get("server")
+  const clearParams = new URLSearchParams(searchParams.toString())
+  clearParams.delete("server")
+  const allServersHref = "/servers" + (clearParams.size ? "?" + clearParams : "")
   const { mode, backendUrl } = useDataSource()
   const isLive = mode === "live"
 
   const [serverList,   setServerList]   = useState<Server[]>([])
-  const [_backendOk,   setBackendOk]   = useState(false)
+  const [listState, setListState] = useState<"loading" | "ready" | "error">("loading")
   const [search,       setSearch]       = useState("")
   const [typeFilter,   setTypeFilter]   = useState<TypeFilter>("all")
   const [advancedFilters, setAdvancedFilters] = useState(() => createFilterQuery())
@@ -283,25 +290,26 @@ export default function ServersPage() {
       if (cancelled) return
       formVersion.current++; testVersion.current++
       setOpen(false); setDeleteTarget(null); setOperationError(""); setOperationMessage(""); setPollResults([])
+      setListState("loading")
     })
     if (mode !== "live") {
       queueMicrotask(() => {
         if (cancelled) return
         setServerList(initialServers)
-        setBackendOk(false)
+        setListState("ready")
       })
       return invalidate
     }
     listServers(backendUrl)
       .then(data => {
         if (cancelled || version !== contextVersion.current) return
-        setBackendOk(true)
+        setListState("ready")
         setServerList(data.map(toFrontendServer))
       })
       .catch((error) => {
         if (cancelled || version !== contextVersion.current) return
         setOperationError(serverOperationError(error))
-        setBackendOk(false)
+        setListState("error")
         setServerList([])
       })
     return invalidate
@@ -550,15 +558,18 @@ export default function ServersPage() {
 
   // ── derived ──────────────────────────────────────────────────────────────
 
+  const selectedServer = serverList.find(server => server.id === selectedServerId)
+
   const filtered = useMemo(() => {
     const base = serverList.filter(sv => {
+      if (selectedServerId !== null && sv.id !== selectedServerId) return false
       if (typeFilter !== "all" && sv.type !== typeFilter) return false
       if (!search) return true
       const q = search.toLowerCase()
       return sv.name.toLowerCase().includes(q) || sv.host.includes(q) || sv.site.toLowerCase().includes(q)
     })
     return applyFilterQuery(base, advancedFilters, SERVER_FILTER_ACCESSORS)
-  }, [serverList, search, typeFilter, advancedFilters])
+  }, [serverList, search, typeFilter, advancedFilters, selectedServerId])
 
   const counts = useMemo(() => ({
     all:          serverList.length,
@@ -585,8 +596,8 @@ export default function ServersPage() {
         crumbs={[{ label: "Управление" }, { label: "Серверы" }]}
         actions={
           <>
-            <Button variant="outline" size="sm" onClick={handlePollAll} disabled={!isLive || controlsBusy || serverList.length === 0}>
-              <RefreshCwIcon className={cn("size-4", pollAllBusy && "animate-spin")} />Проверить все
+            <Button variant="outline" size="sm" onClick={() => selectedServerId !== null ? selectedServer && void runPoll([selectedServer.id]) : void handlePollAll()} disabled={!isLive || controlsBusy || (selectedServerId !== null ? !selectedServer : serverList.length === 0)}>
+              <RefreshCwIcon className={cn("size-4", pollAllBusy && "animate-spin")} />{selectedServerId !== null ? "Проверить сервер" : "Проверить все"}
             </Button>
             <Button variant="outline" size="sm"><DownloadIcon className="size-4" />Экспорт</Button>
             <Button size="sm" onClick={openAdd} disabled={controlsBusy}><PlusIcon className="size-4" />Добавить сервер</Button>
@@ -609,6 +620,19 @@ export default function ServersPage() {
             </Alert>
           )}
 
+          {selectedServerId !== null && (
+            <Alert variant={listState === "error" || (listState === "ready" && !selectedServer) ? "warning" : "info"} role="status" aria-label="Сервер по ссылке">
+              <AlertTitle className="line-clamp-none wrap-anywhere">{selectedServer ? "Выбран сервер: " + selectedServer.name : "Сервер по ссылке"}</AlertTitle>
+              <AlertDescription>
+                <p>{listState === "loading" ? "Загрузка сервера…" : listState === "error" ? "Не удалось загрузить сервер. Проверьте сообщение об ошибке выше." : selectedServer ? selectedServer.host + " · Список ограничен выбранным сервером. Сводка относится ко всем серверам." : "Сервер не найден или недоступен. Возможно, он удалён или у вас нет доступа."}</p>
+                <div className="flex flex-wrap gap-4">
+                  <Link href={allServersHref} className="underline underline-offset-2">Все серверы</Link>
+                  <Link href="/dashboard" className="underline underline-offset-2">К дашборду</Link>
+                </div>
+              </AlertDescription>
+            </Alert>
+          )}
+
           <KpiStatGrid
             aria-label="Сводка серверов"
             items={[
@@ -934,3 +958,7 @@ export default function ServersPage() {
     </div>
   )
 }
+
+export default function ServersPage() {
+  return <Suspense fallback={<p role="status" className="p-6">Загрузка серверов…</p>}><ServersPageContent /></Suspense>
+}