feat(ui): add Needs Attention panel and metrics strip to dashboard

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/components/fleet/FleetDashboard.tsx

@@ -1,7 +1,7 @@
 import { useState, useMemo } from 'react'
 import { useQuery } from '@tanstack/react-query'
 import { useAuth } from '@/lib/auth'
-import { metricsApi, tenantsApi } from '@/lib/api'
+import { metricsApi, tenantsApi, type FleetDevice } from '@/lib/api'
 import { useUIStore } from '@/lib/store'
 import { alertsApi } from '@/lib/alertsApi'
 import { useEventStreamContext } from '@/contexts/EventStreamContext'
@@ -11,7 +11,6 @@ import { LoadingText } from '@/components/ui/skeleton'
 import { EmptyState } from '@/components/ui/empty-state'
 
 // ─── Dashboard Widgets ───────────────────────────────────────────────────────
-import { KpiCards } from '@/components/dashboard/KpiCards'
 import { HealthScore } from '@/components/dashboard/HealthScore'
 import { EventsTimeline } from '@/components/dashboard/EventsTimeline'
 import { BandwidthChart, type BandwidthDevice } from '@/components/dashboard/BandwidthChart'
@@ -40,6 +39,113 @@ function DashboardLoading() {
   )
 }
 
+// ─── Needs Attention (inline component) ─────────────────────────────────────
+
+interface AttentionItem {
+  id: string
+  hostname: string
+  model: string | null
+  severity: 'error' | 'warning'
+  reason: string
+}
+
+function NeedsAttention({ devices }: { devices: FleetDevice[] }) {
+  const items = useMemo<AttentionItem[]>(() => {
+    const result: AttentionItem[] = []
+
+    for (const d of devices) {
+      if (d.status === 'offline') {
+        result.push({
+          id: `${d.id}-offline`,
+          hostname: d.hostname,
+          model: d.model,
+          severity: 'error',
+          reason: 'Offline',
+        })
+      } else if (d.status === 'degraded') {
+        result.push({
+          id: `${d.id}-degraded`,
+          hostname: d.hostname,
+          model: d.model,
+          severity: 'warning',
+          reason: 'Degraded',
+        })
+      }
+
+      if (d.last_cpu_load != null && d.last_cpu_load > 80) {
+        result.push({
+          id: `${d.id}-cpu`,
+          hostname: d.hostname,
+          model: d.model,
+          severity: 'warning',
+          reason: `CPU ${d.last_cpu_load}%`,
+        })
+      }
+    }
+
+    // Sort: errors first, then warnings
+    result.sort((a, b) => {
+      if (a.severity === b.severity) return 0
+      return a.severity === 'error' ? -1 : 1
+    })
+
+    return result.slice(0, 10)
+  }, [devices])
+
+  const count = items.length
+
+  return (
+    <div className="bg-panel border border-border-default rounded-sm mb-3.5">
+      {/* Header */}
+      <div className="px-3 py-2 border-b border-border-default bg-elevated">
+        <span className="text-[7px] font-medium text-text-muted uppercase tracking-[1.5px]">
+          Needs Attention
+        </span>
+        <span className="text-[7px] text-[hsl(var(--text-label))]"> · </span>
+        <span className="text-[7px] text-text-secondary font-mono">{count}</span>
+      </div>
+      {/* Rows */}
+      {count > 0 ? (
+        <div className="divide-y divide-border-subtle">
+          {items.map((item) => (
+            <div
+              key={item.id}
+              className="flex items-center justify-between px-3 py-1.5 border-l-2"
+              style={{
+                borderLeftColor:
+                  item.severity === 'error'
+                    ? 'hsl(var(--error))'
+                    : 'hsl(var(--warning))',
+              }}
+            >
+              <div className="flex items-center gap-2 min-w-0">
+                <span className="text-xs text-text-primary font-medium truncate">
+                  {item.hostname}
+                </span>
+                <span className="text-[10px] text-text-secondary">
+                  {item.model}
+                </span>
+              </div>
+              <span
+                className={cn(
+                  'text-[10px] font-mono font-medium flex-shrink-0',
+                  item.severity === 'error' ? 'text-error' : 'text-warning',
+                )}
+              >
+                {item.reason}
+              </span>
+            </div>
+          ))}
+        </div>
+      ) : (
+        <div className="py-5 text-center">
+          <span className="text-[9px] text-text-muted">No issues detected</span>
+        </div>
+      )}
+    </div>
+  )
+}
+
 // ─── Fleet Dashboard ─────────────────────────────────────────────────────────
 
 export function FleetDashboard() {
@@ -101,6 +207,15 @@ export function FleetDashboard() {
   const onlinePercent =
     totalDevices > 0 ? (onlineDevices.length / totalDevices) * 100 : 0
 
+  const degradedCount = useMemo(
+    () => fleetDevices?.filter((d) => d.status === 'degraded').length ?? 0,
+    [fleetDevices],
+  )
+  const offlineCount = useMemo(
+    () => fleetDevices?.filter((d) => d.status === 'offline').length ?? 0,
+    [fleetDevices],
+  )
+
   // Alert counts
   const alerts = alertsData?.items ?? []
   const criticalCount = alerts.filter((a) => a.severity === 'critical').length
@@ -156,10 +271,10 @@ export function FleetDashboard() {
   return (
     <div className="space-y-6" data-testid="dashboard">
       {/* ── Page Header ─────────────────────────────────────────────────── */}
-      <div className="flex items-center justify-between gap-4">
+      <div className="flex items-center justify-between gap-4 pb-2.5 mb-3.5 border-b border-border-default">
         <div>
-          <h1 className="text-xl font-semibold">Dashboard</h1>
-          <p className="text-sm text-text-muted mt-0.5">
+          <h1 className="text-sm font-semibold text-text-primary">Overview</h1>
+          <p className="text-[9px] text-text-muted mt-0.5">
             Fleet overview across{' '}
             {isSuperAdmin
               ? selectedTenantId && selectedTenantName
@@ -196,7 +311,7 @@ export function FleetDashboard() {
                   'px-2.5 py-1 text-xs font-medium transition-colors',
                   'first:rounded-l-md last:rounded-r-md',
                   refreshInterval === opt.value
-                    ? 'bg-accent/15 text-accent'
+                    ? 'bg-accent-soft text-accent'
                     : 'text-text-muted hover:text-text-secondary hover:bg-elevated/50',
                 )}
               >
@@ -218,13 +333,54 @@ export function FleetDashboard() {
         />
       ) : (
         <>
-          {/* KPI Cards — full width, 4 columns */}
-          <KpiCards
-            totalDevices={totalDevices}
-            onlinePercent={onlinePercent}
-            activeAlerts={totalAlerts}
-            totalBandwidthBps={totalBandwidthBps}
-          />
+          {/* Metrics Strip — joined 4-column bar */}
+          <div className="flex gap-px mb-3.5 bg-border-default rounded-sm overflow-hidden">
+            <div className="flex-1 bg-panel px-3 py-2">
+              <div className="text-lg font-medium font-mono text-text-primary">
+                {totalDevices}
+              </div>
+              <div className="text-[7px] text-text-muted uppercase tracking-[1.5px] font-medium mt-0.5">
+                Devices
+              </div>
+            </div>
+            <div className="flex-1 bg-panel px-3 py-2">
+              <div className="text-lg font-medium font-mono text-success">
+                {onlineDevices.length}
+              </div>
+              <div className="text-[7px] text-text-muted uppercase tracking-[1.5px] font-medium mt-0.5">
+                Online
+              </div>
+            </div>
+            <div className="flex-1 bg-panel px-3 py-2">
+              <div
+                className={cn(
+                  'text-lg font-medium font-mono',
+                  degradedCount > 0 ? 'text-warning' : 'text-text-primary',
+                )}
+              >
+                {degradedCount}
+              </div>
+              <div className="text-[7px] text-text-muted uppercase tracking-[1.5px] font-medium mt-0.5">
+                Degraded
+              </div>
+            </div>
+            <div className="flex-1 bg-panel px-3 py-2">
+              <div
+                className={cn(
+                  'text-lg font-medium font-mono',
+                  offlineCount > 0 ? 'text-error' : 'text-text-primary',
+                )}
+              >
+                {offlineCount}
+              </div>
+              <div className="text-[7px] text-text-muted uppercase tracking-[1.5px] font-medium mt-0.5">
+                Offline
+              </div>
+            </div>
+          </div>
+
+          {/* Needs Attention — full width */}
+          <NeedsAttention devices={fleetDevices ?? []} />
 
           {/* Widget Grid — responsive 3 columns */}
           <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">