Block BitTorrent on the server

- awg-ctrl: optional nft table awg_torrent (GET/PUT /api/torrent, off by
  default). A connection is judged by its first packets, like Xray's
  sniffing: DHT, UDP trackers, uTP SYN, and with @ih support the plain
  TCP handshake and HTTP announce. A match marks the connection in
  conntrack and drops it whole; without @ih only the UDP part is used
- devices that tried are kept in a 10-minute set and flagged as
  "torrent" in user and device stats; with shaping on they sit in the
  background class while the flag lasts
- metrics: awg_torrent_block_enabled/active, awg_torrent_blocked_total,
  awg_torrent_devices and per-peer awg_peer_torrent
- panel: "Торренты" section in server settings, "торренты" chip on users
  and devices; Save sends only what changed

awg-ui/src/tabs/masterkeys/index.tsx

@@ -7,6 +7,7 @@ import { apiFetch, copyText, bytes, timeAgo, type NodeInfo, type PageProps, type
 import { IcoPlus, IcoTrash, IcoCopy, IcoQR, IcoKey, IcoRefresh, IcoSettings } from '../../components/icons';
 import ServerPicker, { serverName } from '../../components/ServerPicker';
 import PriorityChip from '../../components/PriorityChip';
+import TorrentChip from '../../components/TorrentChip';
 import './masterkeys.css';
 
 // Вкладка «Мастер-ключи»: sen://-подписки для SenAWG. Мастер-ключ — это ссылка
@@ -16,7 +17,7 @@ import './masterkeys.css';
 interface MasterKey { id: number; uuid: string; label: string; device_limit: number; devices: number; servers: number[]; created_at: number; deleting?: number[] }
 interface Device {
     id: number; device_id: string; device_name: string; platform: string; version: string; created_at: number; last_seen: number | null;
-    rekey_requested: boolean; online: boolean; lastHandshake: number; rx: number; tx: number; priority?: Priority;
+    rekey_requested: boolean; online: boolean; lastHandshake: number; rx: number; tx: number; priority?: Priority; torrent?: boolean;
     servers_total: number; servers_ok: number;   // на скольких серверах ключа уже стоит его текущий ключ
 }
 
@@ -284,7 +285,8 @@ export default function MasterKeysPage({ token, showMsg }: PageProps) {
                 <span className={`chip chip--${d.online ? 'online' : 'offline'}`}>
                     <span className="chip-dot" />{d.online ? 'Онлайн' : 'Офлайн'}
                 </span>
-                <PriorityChip priority={d.priority} />
+                <PriorityChip priority={d.priority} torrent={d.torrent} />
+                <TorrentChip torrent={d.torrent} />
                 <div className="mk-device-traffic">
                     <span className="mk-metric"><i className="mk-metric-name" data-sfx=" rx">↓</i><b>{bytes(d.rx)}</b></span>
                     <span className="mk-metric"><i className="mk-metric-name" data-sfx=" tx">↑</i><b>{bytes(d.tx)}</b></span>