feat(prd-142): Wave 0 "Is it working?" vitals on Command Centre (US-007)

frontend/app/page.tsx

@@ -2,7 +2,5 @@ import { redirect } from 'next/navigation'
 
  export default function Home() {
   // New home is Chat
-  // Keep this as a server redirect to avoid rendering dashboard on "/"
-  // and to make "/dashboard" the dedicated dashboard route.
   redirect('/chat')
  }

frontend/components/activity/activity-page.tsx

@@ -15,6 +15,9 @@ import {
   Calendar,
   Rss,
   History,
+  Zap,
+  MessageSquare,
+  Boxes,
 } from 'lucide-react'
 import { Button } from '@/components/ui/button'
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select'
@@ -25,6 +28,12 @@ import { ActivityFeed } from './activity-feed'
 import { CommandCenterHistory } from './command-center-history'
 import { ActivityCalendar } from './calendar'
 import { useActivityStats } from '@/hooks/use-activity-api'
+import {
+  useActivationMetrics,
+  useMissionSuccessRate,
+  useErrorsBySubsystem,
+  useWidgetEngagement,
+} from '@/hooks/use-analytics-api'
 import type { StatItem } from '@/components/shared/stats-bar'
 import { cn } from '@/lib/utils'
 
@@ -128,6 +137,66 @@ export function ActivityPage() {
     { label: 'Needs Attention', value: liveStats?.needs_attention ?? 0, icon: AlertTriangle, iconColor: 'text-destructive' },
   ]
 
+  // PRD-142 Wave 0 (US-007) — "Is it working?" platform vitals over the real
+  // measurement endpoints. Per-primitive health (US-006) has no honest data
+  // source yet and renders as an explicit placeholder, not a fake green.
+  const { data: activation } = useActivationMetrics()
+  const { data: mission } = useMissionSuccessRate()
+  const { data: errors } = useErrorsBySubsystem('24h')
+  const { data: widget } = useWidgetEngagement('7d')
+
+  const totalWs = activation?.total_workspaces ?? 0
+  const activationPct = totalWs > 0 ? Math.round((activation?.rate ?? 0) * 100) : 0
+
+  const missionTotal = mission?.total_executions ?? 0
+  const missionPct = missionTotal > 0 ? Math.round(mission?.value ?? 0) : 0
+
+  const errorTotal = errors?.total ?? 0
+  const worstSubsystem = errors?.by_subsystem?.length
+    ? [...errors.by_subsystem].sort((a, b) => b.count - a.count)[0]
+    : null
+
+  const widgetSessions = widget?.sessions ?? 0
+  const widgetEvents = widget?.by_event_type?.reduce((sum, ev) => sum + ev.count, 0) ?? 0
+
+  const vitals: StatItem[] = [
+    {
+      label: 'Activation',
+      value: totalWs > 0 ? `${activationPct}%` : '—',
+      change: totalWs > 0 ? `${activation?.activated ?? 0}/${totalWs} workspaces` : 'No workspaces yet',
+      icon: Zap,
+      iconColor: 'text-primary',
+    },
+    {
+      label: 'Mission success rate',
+      value: missionTotal > 0 ? `${missionPct}%` : '—',
+      change: missionTotal > 0 ? `${mission?.successful_executions ?? 0}/${missionTotal} missions` : 'No missions yet',
+      icon: CheckCircle2,
+      iconColor: 'text-[hsl(var(--success))]',
+    },
+    {
+      label: 'Error rate by subsystem',
+      value: errorTotal,
+      change: errorTotal > 0 && worstSubsystem ? `${worstSubsystem.subsystem} (${worstSubsystem.count}) · 24h` : 'None · 24h',
+      icon: AlertTriangle,
+      iconColor: errorTotal > 0 ? 'text-destructive' : 'text-[hsl(var(--success))]',
+    },
+    {
+      label: 'Widget engagement',
+      value: widgetSessions,
+      change: widgetSessions > 0 ? `${widgetEvents} events · 7d` : 'No widget activity',
+      icon: MessageSquare,
+      iconColor: 'text-[hsl(var(--info))]',
+    },
+    {
+      label: 'Per-primitive health',
+      value: '—',
+      change: 'Not yet measured',
+      icon: Boxes,
+      iconColor: 'text-muted-foreground',
+    },
+  ]
+
   return (
     <div className="space-y-4 sm:space-y-6">
       <div data-tour="activity-page-header">
@@ -164,6 +233,10 @@ export function ActivityPage() {
         <StatsBar stats={stats} className="grid gap-3 md:gap-4" />
       </div>
 
+      <div data-tour="activity-vitals">
+        <StatsBar stats={vitals} glow={false} className="grid gap-3 md:gap-4 lg:grid-cols-5" />
+      </div>
+
       <div>
         <FilterTabs tabs={TAB_DEFS} value={activeTab} onValueChange={setActiveTab} dataTour="activity-tabs">
           <TabsContent value="summary">

frontend/components/auth/user-profile-button.tsx

@@ -16,8 +16,8 @@ interface UserProfileButtonProps {
 }
 
 export function UserProfileButton({
-    afterSignInUrl = '/dashboard',
-    afterSignUpUrl = '/dashboard',
+    afterSignInUrl = '/chat',
+    afterSignUpUrl = '/chat',
 }: UserProfileButtonProps) {
     const { isSignedIn, isLoaded } = useUser()
 

frontend/components/command-center/command-center-shell.tsx

@@ -24,6 +24,7 @@ import { useActivitySchedule } from '@/hooks/use-activity-api'
 import { useDecisionsNeeded } from '@/hooks/use-kpi-api'
 
 import { StatsStrip } from './stats-strip'
+import { IsItWorkingStrip } from './is-it-working-strip'
 import { SummaryTab } from './summary-tab'
 import { BoardTab } from './board-tab'
 import { CalendarTab } from './calendar-tab'
@@ -138,6 +139,7 @@ export function CommandCenterShell() {
       </div>
 
       <StatsStrip />
+      <IsItWorkingStrip />
 
       <nav className="cc-tabs" aria-label="Command Centre sections">
         {TABS.map((t) => {

frontend/components/command-center/is-it-working-strip.tsx

@@ -0,0 +1,124 @@
+'use client'
+
+/**
+ * IsItWorkingStrip — PRD-142 Wave 0 (US-007). A second cc-stats strip,
+ * rendered under StatsStrip in the Command Centre, answering "is the
+ * platform working?" from the real Wave 0 analytics endpoints.
+ *
+ * Mirrors StatsStrip's idiom exactly: label + mono value + tone + delta.
+ * Honest zero/pending states — the PRIMITIVES cell shows "—" / "metric
+ * pending" (like StatsStrip's CACHE-HIT) rather than fabricate a health
+ * signal; per-primitive health (US-006) lands in Wave 3.
+ */
+
+import type { SparklineTone } from './sparkline'
+import {
+  useActivationMetrics,
+  useMissionSuccessRate,
+  useErrorsBySubsystem,
+  useWidgetEngagement,
+} from '@/hooks/use-analytics-api'
+
+interface Cell {
+  label: string
+  value: string
+  tone: SparklineTone
+  delta: string
+}
+
+export function IsItWorkingStrip() {
+  const { data: activation } = useActivationMetrics()
+  const { data: mission } = useMissionSuccessRate()
+  const { data: errors } = useErrorsBySubsystem('24h')
+  const { data: widget } = useWidgetEngagement('7d')
+
+  const totalWs = activation?.total_workspaces ?? 0
+  const activationPct = totalWs > 0 ? Math.round((activation?.rate ?? 0) * 100) : 0
+
+  const missionTotal = mission?.total_executions ?? 0
+  const missionPct = missionTotal > 0 ? Math.round(mission?.value ?? 0) : 0
+
+  const errorTotal = errors?.total ?? 0
+  const worst = errors?.by_subsystem?.length
+    ? [...errors.by_subsystem].sort((a, b) => b.count - a.count)[0]
+    : null
+
+  const sessions = widget?.sessions ?? 0
+  const widgetEvents = widget?.by_event_type?.reduce((sum, ev) => sum + ev.count, 0) ?? 0
+
+  const cells: Cell[] = [
+    {
+      label: 'ACTIVATION',
+      value: totalWs > 0 ? `${activationPct}%` : '—',
+      tone: totalWs > 0 ? 'ok' : 'muted',
+      delta: totalWs > 0 ? `${activation?.activated ?? 0}/${totalWs} workspaces` : 'no workspaces',
+    },
+    {
+      label: 'MISSIONS',
+      value: missionTotal > 0 ? `${missionPct}%` : '—',
+      tone: missionTotal > 0 ? 'ok' : 'muted',
+      delta: missionTotal > 0
+        ? `${mission?.successful_executions ?? 0}/${missionTotal} ok`
+        : 'no missions yet',
+    },
+    {
+      label: 'ERRORS',
+      value: String(errorTotal),
+      tone: errorTotal > 0 ? 'err' : 'ok',
+      delta: errorTotal > 0 && worst ? `${worst.subsystem} (${worst.count}) · 24h` : 'none · 24h',
+    },
+    {
+      label: 'WIDGET',
+      value: String(sessions),
+      tone: sessions > 0 ? 'info' : 'muted',
+      delta: sessions > 0 ? `${widgetEvents} events · 7d` : '— · 7d',
+    },
+    {
+      label: 'PRIMITIVES',
+      value: '—',
+      tone: 'muted',
+      delta: 'metric pending',
+    },
+  ]
+
+  return (
+    <div className="cc-stats">
+      {cells.map((c) => (
+        <div key={c.label} className="cell">
+          <div className="l">
+            <Dot tone={c.tone} />
+            {c.label}
+          </div>
+          <div className={`v ${c.tone === 'muted' ? '' : c.tone}`}>{c.value}</div>
+          <div style={{ display: 'flex', gap: 8, alignItems: 'flex-end' }}>
+            <span className="delta" style={{ flex: 1, minWidth: 0 }}>
+              {c.delta}
+            </span>
+          </div>
+        </div>
+      ))}
+    </div>
+  )
+}
+
+function Dot({ tone }: { tone: SparklineTone }) {
+  if (tone === 'muted') return null
+  const colors: Record<SparklineTone, string> = {
+    ok: 'hsl(82 50% 22%)',
+    err: 'hsl(var(--accent))',
+    warn: 'hsl(38 78% 27%)',
+    info: 'hsl(var(--info))',
+    muted: 'transparent',
+  }
+  return (
+    <span
+      style={{
+        width: 6,
+        height: 6,
+        borderRadius: '50%',
+        background: colors[tone],
+        display: 'inline-block',
+      }}
+    />
+  )
+}