feat(dashboard): replace checklist with next-step card + unified list

Phase 2 Task 41 — Dashboard redesign.

Backend:
- Extend GET /users/onboarding-status with email_verified and shop_setup_done.
- tried_ai_assistant kept in payload for backward-compat during deploy.

Frontend:
- New NextStepCard: surfaces the highest-priority incomplete onboarding item
  with a primary CTA. Priority order: verify email > set up shop > run first
  FlowPilot session > connect PSA > invite teammate > pick a plan (gated on
  trial stage warning/urgent/expired). Returns null when all done OR
  onboarding_dismissed.
- New SetupChecklist: unified single list (no SOLO/TEAM bifurcation), drops
  the stale tried_ai_assistant / Script Builder item, surfaces "Pick a plan"
  when trial stage is warning or later.
- Mounted on QuickStartPage below the hero with a "Show all setup steps"
  toggle. The whole onboarding section auto-hides when there's nothing left
  to nudge on, so the dashboard goes back to clean once setup is done.
- Removed the orphaned OnboardingChecklist component (was defined but never
  mounted).
- New useOnboardingStatus hook so page + components share one fetch contract.

Tests:
- Backend: test_onboarding_status_includes_email_verified_and_shop_setup_done.
- Frontend (Vitest): 13 new tests across NextStepCard, SetupChecklist, and
  QuickStartPage covering priority ordering, dismissal, the SOLO/TEAM
  removal, the toggle reveal, and the trial-stage gate on Pick a plan.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/components/dashboard/SetupChecklist.tsx

@@ -0,0 +1,136 @@
+import { Link } from 'react-router-dom'
+import { Check, ChevronRight } from 'lucide-react'
+import { cn } from '@/lib/utils'
+import type { OnboardingStatus } from '@/api/onboarding'
+import { useTrialBanner } from '@/hooks/useTrialBanner'
+import type { TrialBannerStage } from '@/hooks/useTrialBanner'
+import { useOnboardingStatus } from '@/hooks/useOnboardingStatus'
+
+/**
+ * Unified setup checklist — single list (no SOLO/TEAM bifurcation).
+ *
+ * Replaces the old `OnboardingChecklist` widget. Items match `NextStepCard`'s
+ * priority order. The "Pick a plan" item is gated on the trial stage.
+ *
+ * Surfaced behind a "Show all setup steps" toggle on the dashboard so the
+ * always-visible surface is just the single next-step card.
+ */
+
+interface ChecklistItem {
+  key: string
+  label: string
+  path: string
+  done: boolean
+}
+
+const PLAN_GATE_STAGES: ReadonlyArray<TrialBannerStage> = [
+  'warning',
+  'urgent',
+  'expired',
+]
+
+export function buildChecklistItems(
+  status: OnboardingStatus,
+  trialStage: TrialBannerStage | null,
+): ChecklistItem[] {
+  const items: ChecklistItem[] = [
+    {
+      key: 'verify_email',
+      label: 'Verify your email',
+      path: '/verify-email',
+      done: status.email_verified,
+    },
+    {
+      key: 'shop_setup',
+      label: 'Set up your shop',
+      path: '/welcome/step-1',
+      done: status.shop_setup_done,
+    },
+    {
+      key: 'ran_session',
+      label: 'Run your first FlowPilot session',
+      path: '/',
+      done: status.ran_session,
+    },
+    {
+      key: 'connected_psa',
+      label: 'Connect your PSA',
+      path: '/account/integrations',
+      done: status.connected_psa,
+    },
+    {
+      key: 'invited_teammate',
+      label: 'Invite a teammate',
+      path: '/account',
+      done: status.invited_teammate,
+    },
+  ]
+
+  if (trialStage && PLAN_GATE_STAGES.includes(trialStage)) {
+    items.push({
+      key: 'pick_plan',
+      label: 'Pick a plan',
+      path: '/account/billing/select-plan',
+      done: false,
+    })
+  }
+
+  return items
+}
+
+export function SetupChecklist() {
+  const status = useOnboardingStatus()
+  const { stage } = useTrialBanner()
+
+  if (!status || status.dismissed) return null
+
+  const items = buildChecklistItems(status, stage)
+  const completedCount = items.filter((i) => i.done).length
+  const totalCount = items.length
+
+  return (
+    <div className="card-interactive overflow-hidden" data-testid="setup-checklist">
+      <div className="px-4 pt-3 pb-2">
+        <p className="font-sans text-[0.625rem] uppercase tracking-[0.12em] font-semibold text-muted-foreground">
+          Setup steps · {completedCount} of {totalCount}
+        </p>
+      </div>
+      <ul className="px-2 pb-2 space-y-1">
+        {items.map((item) => (
+          <li key={item.key}>
+            {item.done ? (
+              <div
+                className="w-full flex items-center gap-3 rounded-lg px-3 py-2 text-sm cursor-default"
+                data-testid={`checklist-item-${item.key}`}
+                data-done="true"
+              >
+                <span className="flex h-5 w-5 shrink-0 items-center justify-center rounded-md border border-transparent bg-primary">
+                  <Check size={12} className="text-white" />
+                </span>
+                <span className="flex-1 text-muted-foreground line-through">
+                  {item.label}
+                </span>
+              </div>
+            ) : (
+              <Link
+                to={item.path}
+                className={cn(
+                  'w-full flex items-center gap-3 rounded-lg px-3 py-2 text-sm transition-colors text-left',
+                  'hover:bg-[rgba(255,255,255,0.04)]',
+                )}
+                data-testid={`checklist-item-${item.key}`}
+                data-done="false"
+              >
+                <span className="flex h-5 w-5 shrink-0 items-center justify-center rounded-md border border-border" />
+                <span className="flex-1 text-foreground">{item.label}</span>
+                <ChevronRight size={14} className="text-muted-foreground shrink-0" />
+              </Link>
+            )}
+          </li>
+        ))}
+      </ul>
+    </div>
+  )
+}
+
+export default SetupChecklist