feat: node info, build info and acrylic web theme

Squash of recent dev work: return_session login, backend switcher, line
detail timeline, overview strips, node platform/country/ISP info with flags
and icons, build info (version, tag, time) behind site.show_build, and the
acrylic display theme.

web/admin/src/pages/Probes.tsx

@@ -5,6 +5,7 @@ import { api } from '@shared/api/client'
 import type { Page, ProbeDto, ProbeIdentityDto } from '@shared/api/types'
 import { fmtAgo, fmtTime } from '@shared/format'
 import { useQuery } from '@shared/hooks'
+import { NodeTag, useNodeInfos } from '@shared/nodes'
 import { Chip, Confirm, CopyButton, Dialog, downloadText, Empty, ErrorNotice, Field, Spinner, useAction } from '@shared/ui'
 
 /** probe.json 只在创建和轮换密钥时返回一次：这里让管理员马上下载或复制。 */
@@ -84,6 +85,7 @@ type Pending = { kind: 'rotate' | 'revoke' | 'delete'; probe: ProbeDto }
 
 export function Probes() {
   const probes = useQuery(() => api.get<Page<ProbeDto>>('/api/admin/probes'), [], 8000)
+  const infos = useNodeInfos()
   const { run } = useAction()
   const [creating, setCreating] = useState(false)
   const [renaming, setRenaming] = useState<ProbeDto>()
@@ -123,6 +125,7 @@ export function Probes() {
           <div key={p.id} className="card">
             <div className="row wrap">
               <span style={{ fontSize: 18, fontWeight: 700 }}>{p.name}</span>
+              <NodeTag info={infos.get(p.id)} />
               {p.revoked ? <Chip tone="bad">已吊销</Chip> : <Chip tone={p.connections.length > 0 ? 'ok' : ''}>{p.connections.length > 0 ? `连着 ${p.connections.length} 个 Agent` : '没有连接'}</Chip>}
               <span className="mono faint">{p.id}</span>
               <span className="right row wrap">