feat(wireguard): client config UX, collapsible config card, configurable DNS

Land the WireGuard client-config UX work on main (the upstream PR #5642
branch could not be pushed to).

- Reusable collapsible ConfigBlock (copy/download/QR, actions aligned right)
  for the client .conf, used by client info and the public sub page.
- Correct .conf: canonical PresharedKey casing and DNS sourced from the inbound
  (configurable per-inbound, default 1.1.1.1, 1.0.0.1).
- Configurable per-inbound DNS for WireGuard (schema + form + backend hint via
  InboundOption.WgDns); inert at the Xray layer.
- Public sub page now shows the WireGuard config, rebuilt from the share link;
  the Go wireguard:// link carries dns/presharedkey/keepalive for completeness.
- QR enabled for the wireguard:// link; link rows are compact like other protocols.
- Client information order is subscription, copy URL, WireGuard config; the
  redundant config tab is removed from the add/edit client modal.
- Drop the Inbound Information and QR Code row actions for WireGuard inbounds.

frontend/src/pages/inbounds/info/InboundInfoModal.tsx

@@ -3,7 +3,7 @@ import { useTranslation } from 'react-i18next';
 import { Button, Divider, Modal, Space, Tabs, Tag, Tooltip } from 'antd';
 import { CopyOutlined, SyncOutlined, DeleteOutlined, DownloadOutlined } from '@ant-design/icons';
 
-import { HttpUtil, IntlUtil, SizeFormatter, ColorUtils } from '@/utils';
+import { HttpUtil, IntlUtil, SizeFormatter, ColorUtils, Wireguard } from '@/utils';
 import { Protocols } from '@/schemas/primitives';
 import { InfinityIcon } from '@/components/ui';
 import { useDatepicker } from '@/hooks/useDatepicker';
@@ -208,6 +208,11 @@ export default function InboundInfoModal({
     return remained > 0 ? SizeFormatter.sizeFormat(remained) : '-';
   }, [clientStats, clientSettings]);
 
+  const wgPubKey = useMemo(() => {
+    if (!dbInbound?.isWireguard || !inbound?.settings?.secretKey) return '';
+    return Wireguard.generateKeypair(inbound.settings.secretKey as string).publicKey;
+  }, [dbInbound?.isWireguard, inbound?.settings?.secretKey]);
+
   const formatLastOnline = useCallback(
     (email: string) => {
       const ts = lastOnlineMap[email];
@@ -791,7 +796,7 @@ export default function InboundInfoModal({
             </div>
             <div className="info-row">
               <dt>{t('pages.xray.wireguard.publicKey')}</dt>
-              <dd><Tag className="value-tag">{inbound.settings.pubKey as string}</Tag></dd>
+              <dd><Tag className="value-tag">{wgPubKey}</Tag></dd>
             </div>
             <div className="info-row">
               <dt>{t('pages.inbounds.info.mtu')}</dt>