feat(ui): traffic tooltip (sess/bytes) auf Backend-Health-Chips

Backends- und Routing-Rules-Seite zeigen jetzt beim Hover auf den
UP/DOWN-Chip die aggregierten HAProxy-Stats des jeweiligen Backends:
aktive Sessions + kumulierte Bytes rein/raus seit letztem HAProxy-Start.
Daten kommen aus dem bereits vorhandenen /haproxy/stats-Endpunkt.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

VERSION

@@ -1 +1 @@
-1.1.43
+1.1.44

management-ui/src/pages/Backends/index.tsx

@@ -1,7 +1,7 @@
 import { useState } from 'react'
 import {
   Alert, Button, Card, Form, Input, InputNumber, Modal, Popconfirm,
-  Select, Space, Switch, Table, Tag, Typography, message,
+  Select, Space, Switch, Table, Tag, Tooltip, Typography, message,
 } from 'antd'
 import type { ColumnsType } from 'antd/es/table'
 import { DatabaseOutlined, PlusOutlined } from '@ant-design/icons'
@@ -86,7 +86,17 @@ async function listDomains(): Promise<DomainFull[]> {
   return (r.data.data as { domains?: DomainFull[] }).domains ?? []
 }
 
-interface HAProxyStat { backend: string; server: string; status: string }
+interface HAProxyStat {
+  backend: string; server: string; status: string
+  sessions: number; bytes_in: number; bytes_out: number
+}
+
+function fmtBytes(n: number): string {
+  if (n >= 1_073_741_824) return (n / 1_073_741_824).toFixed(1) + ' GB'
+  if (n >= 1_048_576)     return (n / 1_048_576).toFixed(1) + ' MB'
+  if (n >= 1_024)         return (n / 1_024).toFixed(0) + ' KB'
+  return n + ' B'
+}
 async function listHAProxyStats(): Promise<HAProxyStat[]> {
   try {
     const r = await apiClient.get('/haproxy/stats')
@@ -118,6 +128,16 @@ export default function BackendsPage() {
     return 'DOWN'
   }
 
+  const backendTraffic = (id: number) => {
+    const servers = (haproxyStats ?? []).filter(s => s.backend === `eg_backend_${id}`)
+    if (!servers.length) return null
+    return {
+      sessions: servers.reduce((a, s) => a + (s.sessions ?? 0), 0),
+      bytesIn:  servers.reduce((a, s) => a + (s.bytes_in ?? 0), 0),
+      bytesOut: servers.reduce((a, s) => a + (s.bytes_out ?? 0), 0),
+    }
+  }
+
   // server-counts pro Backend laden wir lazy bei Expansion; in der
   // Tabelle reicht ein Hinweis ob 0 / N Server.
   const { data: serverCounts } = useQuery({
@@ -243,7 +263,15 @@ export default function BackendsPage() {
         const s = backendLiveStatus(row.id)
         if (!s) return <Text type="secondary" style={{ fontSize: 12 }}>—</Text>
         const color = s === 'UP' ? 'green' : s === 'DEGRADED' ? 'orange' : 'red'
-        return <Tag color={color} style={{ margin: 0 }}>{s}</Tag>
+        const tr = backendTraffic(row.id)
+        const tip = tr
+          ? `${tr.sessions} sess · ↓${fmtBytes(tr.bytesIn)} ↑${fmtBytes(tr.bytesOut)}`
+          : undefined
+        return (
+          <Tooltip title={tip}>
+            <Tag color={color} style={{ margin: 0 }}>{s}</Tag>
+          </Tooltip>
+        )
       },
     },
     { title: t('backends.active'), dataIndex: 'active', key: 'active', render: (v: boolean) => <StatusDot active={v} /> },

management-ui/src/pages/RoutingRules/index.tsx

@@ -1,5 +1,5 @@
 import { useState } from 'react'
-import { Button, Form, Input, InputNumber, Modal, Select, Space, Switch, Tag, message } from 'antd'
+import { Button, Form, Input, InputNumber, Modal, Select, Space, Switch, Tag, Tooltip, message } from 'antd'
 import type { ColumnsType } from 'antd/es/table'
 import { BranchesOutlined, PlusOutlined } from '@ant-design/icons'
 import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
@@ -50,7 +50,14 @@ async function listBackends(): Promise<Backend[]> {
   return (r.data.data as { backends?: Backend[] }).backends ?? []
 }
 
-interface HAProxyStat { backend: string; status: string }
+interface HAProxyStat { backend: string; status: string; sessions: number; bytes_in: number; bytes_out: number }
+
+function fmtBytes(n: number): string {
+  if (n >= 1_073_741_824) return (n / 1_073_741_824).toFixed(1) + ' GB'
+  if (n >= 1_048_576)     return (n / 1_048_576).toFixed(1) + ' MB'
+  if (n >= 1_024)         return (n / 1_024).toFixed(0) + ' KB'
+  return n + ' B'
+}
 async function listHAProxyStats(): Promise<HAProxyStat[]> {
   try {
     const r = await apiClient.get('/haproxy/stats')
@@ -77,11 +84,15 @@ export default function RoutingRulesPage() {
     const b = backends?.find((x) => x.id === id)
     return b ? `${b.name} (${b.address}:${b.port})` : `#${id}`
   }
-  const backendHealth = (id: number): 'UP' | 'DOWN' | null => {
+  const backendHealth = (id: number) => {
     if (!haproxyStats?.length) return null
     const servers = haproxyStats.filter(s => s.backend === `eg_backend_${id}`)
     if (!servers.length) return null
-    return servers.some(s => s.status === 'UP') ? 'UP' : 'DOWN'
+    const up = servers.some(s => s.status === 'UP')
+    const sessions = servers.reduce((a, s) => a + (s.sessions ?? 0), 0)
+    const bytesIn  = servers.reduce((a, s) => a + (s.bytes_in ?? 0), 0)
+    const bytesOut = servers.reduce((a, s) => a + (s.bytes_out ?? 0), 0)
+    return { up, sessions, bytesIn, bytesOut }
   }
 
   const [editing, setEditing] = useState<RoutingRule | null>(null)
@@ -119,12 +130,16 @@ export default function RoutingRulesPage() {
     {
       title: t('routing.backend'), dataIndex: 'backend_id', key: 'backend',
       render: (id: number) => {
-        const health = backendHealth(id)
+        const h = backendHealth(id)
+        const tip = h ? `${h.sessions} sess · ↓${fmtBytes(h.bytesIn)} ↑${fmtBytes(h.bytesOut)}` : undefined
         return (
           <Space size={4}>
             <span>{backendLabel(id)}</span>
-            {health === 'UP'   && <Tag color="green" style={{ margin: 0 }}>UP</Tag>}
-            {health === 'DOWN' && <Tag color="red"   style={{ margin: 0 }}>DOWN</Tag>}
+            {h && (
+              <Tooltip title={tip}>
+                <Tag color={h.up ? 'green' : 'red'} style={{ margin: 0 }}>{h.up ? 'UP' : 'DOWN'}</Tag>
+              </Tooltip>
+            )}
           </Space>
         )
       },