feat: LXC container creation from CT templates

- Add LXC deploy API endpoints: GET /proxmox/api/lxc-templates/{id},
  GET /proxmox/api/lxc-storages/{id}, POST /proxmox/api/lxc/deploy
- Add ProxmoxClient.get_lxc_storage_templates() and get_node_storages()
- Fix duplicate create_lxc_container() — removed dead copy, updated
  canonical with nameserver/searchdomain params
- Fix wait_for_task(): accept WARNINGS:N exitstatus as success
- Add IPAM IP release on deploy failure
- Add frontend hooks: useLXCTemplates, useLXCStorages, useDeployLXC
  with 5-min staleTime caching
- Add LXC wizard steps to CreateInstanceWizard (type, template, config)
- Add LXC i18n keys to en.json and ru.json
- Add LXCTemplate and LXCDeployRequest TypeScript interfaces

frontend/src/hooks/use-lxc-templates.ts

@@ -0,0 +1,44 @@
+import { useQuery, useMutation } from '@tanstack/react-query';
+import { apiClient } from '@/lib/api-client';
+import type { LXCTemplate, LXCDeployRequest } from '@/types';
+
+export const lxcKeys = {
+  templates: (serverId: number) => ['lxc-templates', serverId] as const,
+  storages: (serverId: number, node?: string) => ['lxc-storages', serverId, node] as const,
+};
+
+// CT templates change rarely — cache for 5 minutes
+export function useLXCTemplates(serverId?: number) {
+  return useQuery({
+    queryKey: lxcKeys.templates(serverId!),
+    queryFn: () =>
+      apiClient
+        .get<{ server_id: number; templates: LXCTemplate[] }>(`/proxmox/api/lxc-templates/${serverId}`)
+        .then((r) => r.templates),
+    enabled: !!serverId,
+    staleTime: 5 * 60 * 1000,
+  });
+}
+
+// Storage list changes rarely — cache for 5 minutes
+export function useLXCStorages(serverId?: number, node?: string) {
+  const params = node ? `?node=${encodeURIComponent(node)}` : '';
+  return useQuery({
+    queryKey: lxcKeys.storages(serverId!, node),
+    queryFn: () =>
+      apiClient
+        .get<{ storages: { storage: string; type: string; avail: number; total: number }[] }>(
+          `/proxmox/api/lxc-storages/${serverId}${params}`,
+        )
+        .then((r) => r.storages),
+    enabled: !!serverId,
+    staleTime: 5 * 60 * 1000,
+  });
+}
+
+export function useDeployLXC() {
+  return useMutation({
+    mutationFn: (data: LXCDeployRequest) =>
+      apiClient.post<{ task_id: number; status: string; name: string }>('/proxmox/api/lxc/deploy', data),
+  });
+}