UX-001: sidebar re-entry + inline team/owner creation in wizard

Closes UX-001 (OnboardingWizard CertificateStep dead-end): users no
longer have to navigate away from the wizard and lose their in-flight
state when the required Owner/Team dropdowns are empty.

Layout.tsx
  - Adds persistent 'Setup guide' button in the left sidebar.
  - Clears localStorage 'certctl:onboarding-dismissed' then navigates
    to /?onboarding=1 as a re-entry signal that overrides dismissal.
  - localStorage.removeItem wrapped in try/catch to tolerate storage
    access errors (private browsing, quota, etc.).

DashboardPage.tsx
  - Reads ?onboarding=1 via useSearchParams as a forceOnboarding flag.
  - forceOnboarding bypasses the latched first-run gate so the wizard
    reopens even after dismissal or with certs/issuers already present.
  - onDismiss now also strips ?onboarding=1 via setSearchParams(next,
    { replace: true }) so a page refresh does not relaunch the wizard.

OnboardingWizard.tsx
  - Adds CreateTeamModalInline and CreateOwnerModalInline inside
    CertificateStep. Both wire through React Query: createTeam /
    createOwner mutation on success invalidates ['teams'] / ['owners']
    and calls onCreated(id) so the parent select auto-selects the new
    row as soon as the refetch lands.
  - '+ New team' and '+ New owner' buttons placed next to the select
    labels; empty-state copy replaced with inline 'create one now'
    buttons (no more Link back to /owners /teams).
  - CreateOwner coerces empty teamId to undefined before mutation so
    the server contract matches OwnersPage.

Tests (12 new, all green; total suite 252 passed / 0 failed):
  - Layout.test.tsx (4): Setup guide button renders, clicking it clears
    the dismissal key and navigates to /?onboarding=1, tolerates
    localStorage.removeItem throwing.
  - DashboardPage.test.tsx (4): first-run auto-open, ?onboarding=1
    re-entry after dismissal, onDismiss writes localStorage + strips
    the query param, dismissed-with-no-param stays closed.
  - OnboardingWizard.test.tsx (4): Skip-Skip reaches CertificateStep
    with '+ New team' / '+ New owner' buttons visible; '+ New team'
    happy path with React Query invalidation + parent-select
    auto-select via option-parent traversal (label is a sibling, not
    htmlFor-linked); '+ New owner' happy path pins team_id: undefined
    coercion; Cancel abort never mutates.

Test infrastructure notes:
  - Closure-driven vi.fn().mockImplementation pattern drives the
    post-invalidation refetch: the mutation mock mutates a closure
    variable that the getTeams/getOwners mock reads, so the parent
    select's new <option> exists by the time the refetch lands.
  - Anchored regex (/^Create Team$/, /^Create Owner$/) disambiguates
    the modal submit from the '+ New team' / '+ New owner' triggers.

Verification gates (all green):
  - vitest run: 252 passed / 0 failed (8 files, 13.98s)
  - tsc --noEmit: 0 errors
  - vite build: clean production bundle (851.77 kB js / 226.81 kB gzip)

No new runtime dependencies. Frontend-only change.

web/src/components/Layout.test.tsx

@@ -0,0 +1,127 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { render, screen, fireEvent, cleanup } from '@testing-library/react';
+import { MemoryRouter, Routes, Route } from 'react-router-dom';
+
+// -----------------------------------------------------------------------------
+// UX-001 Phase 4 — Layout "Setup guide" re-entry button
+//
+// Phase 2 added a persistent "Setup guide" button to the sidebar so operators
+// who dismissed the onboarding wizard (or closed it mid-flow) can always walk
+// themselves back in. The button must:
+//
+//   1. Render with the accessible name "Setup guide".
+//   2. On click, clear the `certctl:onboarding-dismissed` localStorage key so
+//      DashboardPage's first-run detection re-engages.
+//   3. On click, navigate to `/?onboarding=1` — the query-param re-entry
+//      signal DashboardPage reads via useSearchParams. The query param is the
+//      contract between Layout and DashboardPage; without it, a user who
+//      already has certs + issuers would not see the wizard again.
+// -----------------------------------------------------------------------------
+
+// Intercept useNavigate so we can assert the destination path without having
+// to configure every route segment the wizard might push to.
+const mockNavigate = vi.fn();
+vi.mock('react-router-dom', async () => {
+  const actual = await vi.importActual<typeof import('react-router-dom')>('react-router-dom');
+  return {
+    ...actual,
+    useNavigate: () => mockNavigate,
+  };
+});
+
+// Layout pulls auth state from AuthProvider to decide whether to render the
+// logout button. Tests don't care about auth — stub the hook with an anonymous
+// session so Layout renders without needing a real AuthProvider wrapper.
+vi.mock('./AuthProvider', () => ({
+  useAuth: () => ({
+    loading: false,
+    authRequired: false,
+    authenticated: true,
+    authType: 'none',
+    user: '',
+    admin: false,
+    login: vi.fn(),
+    logout: vi.fn(),
+    error: null,
+  }),
+}));
+
+// Imported after vi.mock so the mocks are in effect when Layout's module graph
+// resolves.
+import Layout from './Layout';
+
+function renderLayout() {
+  return render(
+    <MemoryRouter initialEntries={['/']}>
+      <Routes>
+        <Route element={<Layout />}>
+          <Route path="/" element={<div data-testid="outlet-root">root</div>} />
+        </Route>
+      </Routes>
+    </MemoryRouter>,
+  );
+}
+
+describe('Layout — UX-001 Setup guide sidebar button', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    cleanup();
+    localStorage.clear();
+  });
+
+  afterEach(() => {
+    localStorage.clear();
+  });
+
+  it('renders a "Setup guide" button in the sidebar', () => {
+    renderLayout();
+
+    // Red-to-green guard: if the button is removed or renamed, this catches
+    // it. We match by accessible name so the assertion survives className /
+    // icon churn.
+    expect(screen.getByRole('button', { name: /Setup guide/i })).toBeInTheDocument();
+  });
+
+  it('clears the onboarding-dismissed localStorage key on click', () => {
+    localStorage.setItem('certctl:onboarding-dismissed', 'true');
+    expect(localStorage.getItem('certctl:onboarding-dismissed')).toBe('true');
+
+    renderLayout();
+    fireEvent.click(screen.getByRole('button', { name: /Setup guide/i }));
+
+    // DashboardPage reads this key synchronously to decide whether the first-
+    // run wizard can auto-open. Leaving it set would suppress the wizard even
+    // after navigation, defeating the re-entry contract.
+    expect(localStorage.getItem('certctl:onboarding-dismissed')).toBeNull();
+  });
+
+  it('navigates to /?onboarding=1 on click', () => {
+    renderLayout();
+    fireEvent.click(screen.getByRole('button', { name: /Setup guide/i }));
+
+    // The `?onboarding=1` query param is the explicit signal DashboardPage
+    // checks via useSearchParams. Asserting the exact path pins the contract
+    // both ends rely on.
+    expect(mockNavigate).toHaveBeenCalledTimes(1);
+    expect(mockNavigate).toHaveBeenCalledWith('/?onboarding=1');
+  });
+
+  it('tolerates localStorage access failure without throwing', () => {
+    // Some browsers / privacy modes throw on localStorage access. Layout
+    // wraps the removal in try/catch so the navigation still fires. Simulate
+    // the failure and verify the navigation path is unaffected.
+    const original = Storage.prototype.removeItem;
+    Storage.prototype.removeItem = vi.fn(() => {
+      throw new Error('localStorage unavailable');
+    });
+
+    try {
+      renderLayout();
+      fireEvent.click(screen.getByRole('button', { name: /Setup guide/i }));
+
+      expect(mockNavigate).toHaveBeenCalledWith('/?onboarding=1');
+    } finally {
+      Storage.prototype.removeItem = original;
+    }
+  });
+});

web/src/components/Layout.tsx

@@ -1,4 +1,4 @@
-import { NavLink, Outlet } from 'react-router-dom';
+import { NavLink, Outlet, useNavigate } from 'react-router-dom';
 import { useAuth } from './AuthProvider';
 import logo from '../assets/certctl-logo.png';
 
@@ -35,6 +35,12 @@ function Icon({ d }: { d: string }) {
 
 export default function Layout() {
   const { authRequired, logout } = useAuth();
+  const navigate = useNavigate();
+
+  const openSetupGuide = () => {
+    try { localStorage.removeItem('certctl:onboarding-dismissed'); } catch { /* noop */ }
+    navigate('/?onboarding=1');
+  };
 
   return (
     <div className="flex h-screen overflow-hidden">
@@ -71,6 +77,18 @@ export default function Layout() {
           ))}
         </nav>
 
+        <div className="px-3 pb-2 pt-2 border-t border-white/10">
+          <button
+            type="button"
+            onClick={openSetupGuide}
+            title="Reopen the onboarding wizard"
+            className="w-full flex items-center gap-3 px-3 py-2 text-[13px] rounded text-sidebar-text hover:text-white hover:bg-white/10 transition-all duration-150"
+          >
+            <Icon d="M9.663 17h4.673M12 3v1m6.364 1.636l-.707.707M21 12h-1M4 12H3m3.343-5.657l-.707-.707m2.828 9.9a5 5 0 117.072 0l-.548.547A3.374 3.374 0 0014 18.469V19a2 2 0 11-4 0v-.531c0-.895-.356-1.754-.988-2.386l-.548-.547z" />
+            Setup guide
+          </button>
+        </div>
+
         <div className="px-5 py-3 border-t border-white/10 flex items-center justify-between">
           <span className="text-[10px] text-brand-300/60 font-mono">certctl</span>
           {authRequired && (

web/src/pages/DashboardPage.test.tsx

@@ -0,0 +1,237 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { render, screen, fireEvent, waitFor, cleanup } from '@testing-library/react';
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import { MemoryRouter, Routes, Route, useLocation } from 'react-router-dom';
+import type { ReactNode } from 'react';
+
+// -----------------------------------------------------------------------------
+// UX-001 Phase 4 — DashboardPage onboarding wizard entry/exit contract
+//
+// DashboardPage is the arbiter of when the OnboardingWizard is visible. Two
+// triggers must both work:
+//
+//   1. First-run detection: no certificates + no user-configured issuers +
+//      no dismissal flag → auto-open the wizard.
+//
+//   2. Re-entry via URL: `?onboarding=1` query param forces the wizard open
+//      even for users who already have certs or have previously dismissed it.
+//      This is the other end of the Layout "Setup guide" contract tested in
+//      Layout.test.tsx.
+//
+// And the close path must clean up after itself:
+//
+//   3. On dismiss, DashboardPage must (a) set
+//      `certctl:onboarding-dismissed=true` in localStorage so it doesn't
+//      auto-reopen on refresh, and (b) strip the `?onboarding=1` query param
+//      via setSearchParams(..., { replace: true }) so a subsequent refresh
+//      doesn't relaunch the wizard either.
+// -----------------------------------------------------------------------------
+
+// Mock the entire API client. vi.mock factories are hoisted above the imports
+// that follow, so these stubs are in effect when DashboardPage's module graph
+// resolves.
+vi.mock('../api/client', () => ({
+  getCertificates: vi.fn(),
+  getAgents: vi.fn(),
+  getJobs: vi.fn(),
+  getNotifications: vi.fn(),
+  getHealth: vi.fn(),
+  getDashboardSummary: vi.fn(),
+  getCertificatesByStatus: vi.fn(),
+  getExpirationTimeline: vi.fn(),
+  getJobTrends: vi.fn(),
+  getIssuanceRate: vi.fn(),
+  previewDigest: vi.fn(),
+  sendDigest: vi.fn(),
+  getIssuers: vi.fn(),
+}));
+
+// Replace OnboardingWizard with a paper-thin stub so these tests exercise the
+// entry/exit contract without pulling OnboardingWizard's (heavy) query tree
+// and step machinery into the fixture. OnboardingWizard's own behaviour is
+// covered in OnboardingWizard.test.tsx.
+vi.mock('./OnboardingWizard', () => ({
+  default: ({ onDismiss }: { onDismiss: () => void }) => (
+    <div data-testid="onboarding-wizard">
+      <button type="button" data-testid="wizard-dismiss-btn" onClick={onDismiss}>
+        dismiss
+      </button>
+    </div>
+  ),
+}));
+
+import DashboardPage from './DashboardPage';
+import * as client from '../api/client';
+
+// Location probe: renders current pathname+search into the DOM so we can
+// assert that setSearchParams(next, { replace: true }) actually stripped the
+// `?onboarding=1` query param without relying on router internals.
+function LocationProbe() {
+  const loc = useLocation();
+  return (
+    <div data-testid="location-probe">
+      {loc.pathname}
+      {loc.search}
+    </div>
+  );
+}
+
+function renderDashboard(initialEntry = '/') {
+  const qc = new QueryClient({
+    defaultOptions: {
+      queries: { retry: false, gcTime: 0, staleTime: 0 },
+    },
+  });
+  return render(
+    <QueryClientProvider client={qc}>
+      <MemoryRouter initialEntries={[initialEntry]}>
+        <LocationProbe />
+        <Routes>
+          <Route path="/" element={<DashboardPage />} />
+        </Routes>
+      </MemoryRouter>
+    </QueryClientProvider>,
+  );
+}
+
+// Canonical "empty but well-formed" stubs for every query DashboardPage calls
+// unconditionally. Returning data (rather than leaving queries pending) lets
+// the component pass its `summary !== undefined && issuersData !== undefined`
+// gate and compute isFirstRun in a single render pass.
+function stubAllQueriesEmpty() {
+  vi.mocked(client.getHealth).mockResolvedValue({ status: 'healthy' } as never);
+  vi.mocked(client.getDashboardSummary).mockResolvedValue({
+    total_certificates: 0,
+    expiring_certificates: 0,
+    expired_certificates: 0,
+    revoked_certificates: 0,
+    active_agents: 0,
+    pending_jobs: 0,
+    completed_jobs: 0,
+    failed_jobs: 0,
+    notifications_dead: 0,
+  } as never);
+  vi.mocked(client.getIssuers).mockResolvedValue({
+    data: [],
+    total: 0,
+    page: 1,
+    per_page: 100,
+  } as never);
+  vi.mocked(client.getCertificatesByStatus).mockResolvedValue([] as never);
+  vi.mocked(client.getExpirationTimeline).mockResolvedValue([] as never);
+  vi.mocked(client.getJobTrends).mockResolvedValue([] as never);
+  vi.mocked(client.getIssuanceRate).mockResolvedValue([] as never);
+  vi.mocked(client.getCertificates).mockResolvedValue({
+    data: [],
+    total: 0,
+    page: 1,
+    per_page: 100,
+  } as never);
+  vi.mocked(client.getJobs).mockResolvedValue({
+    data: [],
+    total: 0,
+    page: 1,
+    per_page: 100,
+  } as never);
+}
+
+describe('DashboardPage — UX-001 onboarding wizard entry/exit', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    cleanup();
+    localStorage.clear();
+    stubAllQueriesEmpty();
+  });
+
+  afterEach(() => {
+    localStorage.clear();
+  });
+
+  it('auto-opens the wizard on first run (no certs, no user-configured issuers, no dismissal)', async () => {
+    renderDashboard('/');
+
+    // First-run detection runs after the summary + issuers queries resolve.
+    // The wizard is gated behind a setTimeout(..., 0) in DashboardPage to
+    // avoid setState-during-render, so we waitFor the stub to appear.
+    await waitFor(() => {
+      expect(screen.getByTestId('onboarding-wizard')).toBeInTheDocument();
+    });
+  });
+
+  it('opens the wizard when URL has ?onboarding=1, even with dismissal flag set', async () => {
+    // Simulate a user who dismissed the wizard previously and is now clicking
+    // the sidebar "Setup guide" button, which navigates to /?onboarding=1.
+    localStorage.setItem('certctl:onboarding-dismissed', 'true');
+
+    // Give the fixture non-zero counts so first-run detection would *not*
+    // fire on its own. Only the query-param override should open the wizard.
+    vi.mocked(client.getDashboardSummary).mockResolvedValue({
+      total_certificates: 42,
+      expiring_certificates: 0,
+      expired_certificates: 0,
+      revoked_certificates: 0,
+      active_agents: 3,
+      pending_jobs: 0,
+      completed_jobs: 0,
+      failed_jobs: 0,
+      notifications_dead: 0,
+    } as never);
+    vi.mocked(client.getIssuers).mockResolvedValue({
+      data: [{ id: 'iss-prod', name: 'Prod ACME', type: 'ACME', source: 'database' }],
+      total: 1,
+      page: 1,
+      per_page: 100,
+    } as never);
+
+    renderDashboard('/?onboarding=1');
+
+    await waitFor(() => {
+      expect(screen.getByTestId('onboarding-wizard')).toBeInTheDocument();
+    });
+  });
+
+  it('onDismiss sets localStorage flag and strips ?onboarding=1 from the URL', async () => {
+    renderDashboard('/?onboarding=1');
+
+    // Wait for the wizard to open.
+    await waitFor(() => {
+      expect(screen.getByTestId('onboarding-wizard')).toBeInTheDocument();
+    });
+
+    // Sanity: URL still carries the re-entry signal before dismiss.
+    expect(screen.getByTestId('location-probe').textContent).toContain('onboarding=1');
+
+    fireEvent.click(screen.getByTestId('wizard-dismiss-btn'));
+
+    // After dismiss: localStorage is set, so a future refresh won't re-open.
+    await waitFor(() => {
+      expect(localStorage.getItem('certctl:onboarding-dismissed')).toBe('true');
+    });
+
+    // The wizard is torn down.
+    await waitFor(() => {
+      expect(screen.queryByTestId('onboarding-wizard')).not.toBeInTheDocument();
+    });
+
+    // And the `?onboarding=1` query param is stripped via replace: true so
+    // refreshing the page won't reopen the wizard via the URL path either.
+    await waitFor(() => {
+      const probe = screen.getByTestId('location-probe').textContent ?? '';
+      expect(probe).not.toContain('onboarding=1');
+    });
+  });
+
+  it('does not open the wizard when dismissed and URL has no onboarding param', async () => {
+    localStorage.setItem('certctl:onboarding-dismissed', 'true');
+    renderDashboard('/');
+
+    // Give queries a tick to settle.
+    await waitFor(() => {
+      expect(screen.getByText(/System healthy|Checking system status/i)).toBeInTheDocument();
+    });
+
+    // The wizard should NOT have auto-opened — dismissal flag is respected
+    // when the URL doesn't carry the override signal.
+    expect(screen.queryByTestId('onboarding-wizard')).not.toBeInTheDocument();
+  });
+});

web/src/pages/DashboardPage.tsx

@@ -1,6 +1,6 @@
 import { useState } from 'react';
 import { useQuery, useMutation } from '@tanstack/react-query';
-import { useNavigate } from 'react-router-dom';
+import { useNavigate, useSearchParams } from 'react-router-dom';
 import {
   BarChart, Bar, LineChart, Line, PieChart, Pie, Cell,
   XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer, Legend,
@@ -162,6 +162,7 @@ function DigestCard() {
 
 export default function DashboardPage() {
   const navigate = useNavigate();
+  const [searchParams, setSearchParams] = useSearchParams();
 
   // Onboarding wizard state: once shown, stays shown until explicitly dismissed.
   // Uses a ref to "latch" the first-run detection so query refetches don't yank the wizard away.
@@ -170,6 +171,10 @@ export default function DashboardPage() {
   });
   const [showWizard, setShowWizard] = useState(false);
 
+  // Re-entry signal: sidebar "Setup guide" button navigates to /?onboarding=1 to reopen the wizard
+  // even after dismissal. Takes precedence over localStorage dismissal; stripped on close.
+  const forceOnboarding = searchParams.get('onboarding') === '1';
+
   // All hooks must be called unconditionally (React rules of hooks — no hooks after early returns)
   const { data: health } = useQuery({ queryKey: ['health'], queryFn: getHealth, refetchInterval: 30000 });
   const { data: summary } = useQuery({ queryKey: ['dashboard-summary'], queryFn: getDashboardSummary, refetchInterval: 30000 });
@@ -190,17 +195,23 @@ export default function DashboardPage() {
     summary.total_certificates === 0 &&
     userConfiguredIssuers.length === 0;
 
-  if (isFirstRun && !showWizard) {
+  if ((isFirstRun || forceOnboarding) && !showWizard) {
     // Can't call setState during render — use a microtask
     setTimeout(() => setShowWizard(true), 0);
   }
 
-  if (showWizard && !onboardingDismissed) {
+  if ((showWizard && !onboardingDismissed) || forceOnboarding) {
     return (
       <OnboardingWizard onDismiss={() => {
         try { localStorage.setItem('certctl:onboarding-dismissed', 'true'); } catch { /* noop */ }
         setOnboardingDismissed(true);
         setShowWizard(false);
+        // Strip ?onboarding=1 so page refresh doesn't relaunch the wizard
+        if (searchParams.has('onboarding')) {
+          const next = new URLSearchParams(searchParams);
+          next.delete('onboarding');
+          setSearchParams(next, { replace: true });
+        }
       }} />
     );
   }

web/src/pages/OnboardingWizard.test.tsx

@@ -0,0 +1,311 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { render, screen, fireEvent, waitFor, cleanup } from '@testing-library/react';
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+import { MemoryRouter } from 'react-router-dom';
+
+// -----------------------------------------------------------------------------
+// UX-001 Phase 3 — CertificateStep inline team + owner creation contract
+//
+// The wizard has to satisfy C-001's six required certificate fields (name,
+// common_name, issuer_id, owner_id, team_id, renewal_policy_id). Before Phase
+// 3, a fresh install had no teams + no owners, so the two required `<select>`s
+// were empty and the only way forward was to leave the wizard (losing state)
+// and visit /owners + /teams. The inline modals close that dead end by letting
+// users create a team or owner without leaving CertificateStep.
+//
+// These tests pin the contract on the inline modals specifically:
+//
+//   1. Skip-skip navigation reaches CertificateStep with the "+ New team" and
+//      "+ New owner" buttons present.
+//   2. "+ New team" opens the inline modal; submit calls `createTeam`, the
+//      React Query cache invalidates, and the parent team `<select>` auto-
+//      selects the new team's id.
+//   3. "+ New owner" does the same for owners.
+//   4. Cancel closes the modal without firing the mutation — pins the
+//      "nothing leaks on abort" guarantee.
+//
+// DashboardPage's outer wizard entry/exit contract is covered in
+// DashboardPage.test.tsx. Layout's sidebar re-entry button is covered in
+// Layout.test.tsx.
+// -----------------------------------------------------------------------------
+
+// Mock the entire API client. vi.mock factories are hoisted above the imports
+// that follow, so these stubs are in effect when OnboardingWizard's module
+// graph resolves.
+vi.mock('../api/client', () => ({
+  getApiKey: vi.fn(() => 'test-api-key'),
+  getIssuers: vi.fn(),
+  getAgents: vi.fn(),
+  getProfiles: vi.fn(),
+  getOwners: vi.fn(),
+  getTeams: vi.fn(),
+  getPolicies: vi.fn(),
+  createIssuer: vi.fn(),
+  testIssuerConnection: vi.fn(),
+  createCertificate: vi.fn(),
+  triggerRenewal: vi.fn(),
+  createTeam: vi.fn(),
+  createOwner: vi.fn(),
+}));
+
+import OnboardingWizard from './OnboardingWizard';
+import * as client from '../api/client';
+
+function renderWizard() {
+  const qc = new QueryClient({
+    defaultOptions: {
+      queries: { retry: false, gcTime: 0, staleTime: 0 },
+    },
+  });
+  return render(
+    <QueryClientProvider client={qc}>
+      <MemoryRouter initialEntries={['/']}>
+        <OnboardingWizard onDismiss={vi.fn()} />
+      </MemoryRouter>
+    </QueryClientProvider>,
+  );
+}
+
+// Canonical "empty but well-formed" stubs for every query the wizard calls.
+// Returning data (rather than leaving queries pending) lets CertificateStep's
+// dropdowns render their placeholder options immediately.
+function stubAllQueriesEmpty() {
+  vi.mocked(client.getIssuers).mockResolvedValue({
+    data: [], total: 0, page: 1, per_page: 100,
+  } as never);
+  vi.mocked(client.getAgents).mockResolvedValue({
+    data: [], total: 0, page: 1, per_page: 100,
+  } as never);
+  vi.mocked(client.getProfiles).mockResolvedValue({
+    data: [], total: 0, page: 1, per_page: 100,
+  } as never);
+  vi.mocked(client.getOwners).mockResolvedValue({
+    data: [], total: 0, page: 1, per_page: 500,
+  } as never);
+  vi.mocked(client.getTeams).mockResolvedValue({
+    data: [], total: 0, page: 1, per_page: 500,
+  } as never);
+  vi.mocked(client.getPolicies).mockResolvedValue({
+    data: [], total: 0, page: 1, per_page: 500,
+  } as never);
+}
+
+// Drive through Skip to reach CertificateStep. Each step renders its own
+// "Skip this step" button in the WizardFooter; clicking it advances via the
+// parent goTo() state machine. "Skip setup" in the header (top-right) is a
+// different button tied to onDismiss and is intentionally not clicked here.
+async function advanceToCertificateStep() {
+  // IssuerStep renders first. Wait for its heading before clicking skip so
+  // we don't race ahead of the initial render.
+  await waitFor(() => {
+    expect(
+      screen.getByRole('heading', { name: /Connect a Certificate Authority/i }),
+    ).toBeInTheDocument();
+  });
+  fireEvent.click(screen.getByRole('button', { name: /Skip this step/i }));
+
+  // AgentStep — wait for its heading, then skip.
+  await waitFor(() => {
+    expect(
+      screen.getByRole('heading', { name: /Deploy a certctl Agent/i }),
+    ).toBeInTheDocument();
+  });
+  fireEvent.click(screen.getByRole('button', { name: /Skip this step/i }));
+
+  // CertificateStep — wait for its heading. Caller can now exercise the
+  // inline modals.
+  await waitFor(() => {
+    expect(
+      screen.getByRole('heading', { name: /Add a Certificate/i }),
+    ).toBeInTheDocument();
+  });
+}
+
+describe('OnboardingWizard — UX-001 inline team + owner creation in CertificateStep', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    cleanup();
+    stubAllQueriesEmpty();
+  });
+
+  it('skip-skip reaches CertificateStep with "+ New team" and "+ New owner" buttons', async () => {
+    renderWizard();
+    await advanceToCertificateStep();
+
+    // The contract buttons are the whole point of UX-001 Phase 3 — if they
+    // disappear, the dead-end is back.
+    expect(screen.getByRole('button', { name: /\+ New team/i })).toBeInTheDocument();
+    expect(screen.getByRole('button', { name: /\+ New owner/i })).toBeInTheDocument();
+  });
+
+  it('+ New team opens the inline modal, calls createTeam, invalidates the cache, and auto-selects the new team', async () => {
+    // Drive getTeams from a closure variable so React Query's post-mutation
+    // refetch observes the newly-created team. Without this, the parent
+    // <select> would auto-select 't-platform' but the DOM would have no
+    // matching <option> and the browser normalizes select.value back to ''.
+    let teamsData: Array<{
+      id: string; name: string; description: string; created_at: string; updated_at: string;
+    }> = [];
+    vi.mocked(client.getTeams).mockImplementation(() =>
+      Promise.resolve({
+        data: teamsData,
+        total: teamsData.length,
+        page: 1,
+        per_page: 500,
+      } as never),
+    );
+
+    vi.mocked(client.createTeam).mockImplementation(async (data) => {
+      const team = {
+        id: 't-platform',
+        name: data?.name ?? 'unnamed',
+        description: data?.description ?? '',
+        created_at: '2026-04-19T00:00:00Z',
+        updated_at: '2026-04-19T00:00:00Z',
+      };
+      // Mutate the closure so the subsequent invalidation-triggered refetch
+      // of ['teams'] returns the new row. Per
+      // OnboardingWizard.tsx:411-419 the success branch invalidates
+      // queryKey ['teams'] before firing onCreated(team.id) + onClose().
+      teamsData = [team];
+      return team as never;
+    });
+
+    renderWizard();
+    await advanceToCertificateStep();
+
+    // Open the inline team modal.
+    fireEvent.click(screen.getByRole('button', { name: /\+ New team/i }));
+
+    // Modal is open — "Create Team" heading + the autofocused Name input
+    // are both present.
+    await waitFor(() => {
+      expect(screen.getByRole('heading', { name: /Create Team/i })).toBeInTheDocument();
+    });
+    const nameInput = screen.getByPlaceholderText(/Platform Engineering/i);
+    fireEvent.change(nameInput, { target: { value: 'Platform Eng' } });
+
+    // Submit — anchored regex so we don't accidentally match "+ New team"
+    // or any "Create Team" banner elsewhere on the page.
+    fireEvent.click(screen.getByRole('button', { name: /^Create Team$/ }));
+
+    // Mutation fires with trimmed name + empty description — mirrors the
+    // contract in OnboardingWizard.tsx:411.
+    await waitFor(() => {
+      expect(vi.mocked(client.createTeam)).toHaveBeenCalledWith({
+        name: 'Platform Eng',
+        description: '',
+      });
+    });
+
+    // Modal tears down on success (onClose() in the mutation's onSuccess).
+    await waitFor(() => {
+      expect(screen.queryByRole('heading', { name: /Create Team/i })).not.toBeInTheDocument();
+    });
+
+    // Parent <select> auto-selected the new team. Locate the select by
+    // finding the new team's <option> (which only exists on the parent
+    // form's team dropdown after the refetch populates it), then assert
+    // the select's current value is the new id. This avoids relying on
+    // label-for-select association, which the current markup doesn't
+    // provide (label is a sibling, not htmlFor-linked).
+    const newTeamOption = await screen.findByRole('option', { name: /Platform Eng/i });
+    const teamSelect = newTeamOption.closest('select') as HTMLSelectElement;
+    expect(teamSelect).not.toBeNull();
+    await waitFor(() => {
+      expect(teamSelect.value).toBe('t-platform');
+    });
+  });
+
+  it('+ New owner opens the inline modal, calls createOwner, invalidates the cache, and auto-selects the new owner', async () => {
+    let ownersData: Array<{
+      id: string; name: string; email: string; team_id: string;
+      created_at: string; updated_at: string;
+    }> = [];
+    vi.mocked(client.getOwners).mockImplementation(() =>
+      Promise.resolve({
+        data: ownersData,
+        total: ownersData.length,
+        page: 1,
+        per_page: 500,
+      } as never),
+    );
+
+    vi.mocked(client.createOwner).mockImplementation(async (data) => {
+      const owner = {
+        id: 'o-alice',
+        name: data?.name ?? 'unnamed',
+        email: data?.email ?? '',
+        team_id: data?.team_id ?? '',
+        created_at: '2026-04-19T00:00:00Z',
+        updated_at: '2026-04-19T00:00:00Z',
+      };
+      ownersData = [owner];
+      return owner as never;
+    });
+
+    renderWizard();
+    await advanceToCertificateStep();
+
+    fireEvent.click(screen.getByRole('button', { name: /\+ New owner/i }));
+
+    await waitFor(() => {
+      expect(screen.getByRole('heading', { name: /Create Owner/i })).toBeInTheDocument();
+    });
+
+    fireEvent.change(screen.getByPlaceholderText(/Alice Chen/i), {
+      target: { value: 'Alice Chen' },
+    });
+    fireEvent.change(screen.getByPlaceholderText(/alice@example\.com/i), {
+      target: { value: 'alice@example.com' },
+    });
+
+    fireEvent.click(screen.getByRole('button', { name: /^Create Owner$/ }));
+
+    // Per OnboardingWizard.tsx:485-489, team_id is coerced to `undefined`
+    // when the optional Team select is left at its default empty value —
+    // otherwise the server would see `team_id: ""` and 400 on an invalid
+    // FK. This assertion pins that coercion.
+    await waitFor(() => {
+      expect(vi.mocked(client.createOwner)).toHaveBeenCalledWith({
+        name: 'Alice Chen',
+        email: 'alice@example.com',
+        team_id: undefined,
+      });
+    });
+
+    await waitFor(() => {
+      expect(screen.queryByRole('heading', { name: /Create Owner/i })).not.toBeInTheDocument();
+    });
+
+    // Parent Owner <select> auto-selects the new owner. Option text format
+    // from OnboardingWizard.tsx:754-756 is `{name}{email ? ` (${email})` : ''}`
+    // — "Alice Chen (alice@example.com)".
+    const newOwnerOption = await screen.findByRole('option', { name: /Alice Chen/i });
+    const ownerSelect = newOwnerOption.closest('select') as HTMLSelectElement;
+    expect(ownerSelect).not.toBeNull();
+    await waitFor(() => {
+      expect(ownerSelect.value).toBe('o-alice');
+    });
+  });
+
+  it('cancel on the team modal closes it without firing createTeam', async () => {
+    renderWizard();
+    await advanceToCertificateStep();
+
+    fireEvent.click(screen.getByRole('button', { name: /\+ New team/i }));
+    await waitFor(() => {
+      expect(screen.getByRole('heading', { name: /Create Team/i })).toBeInTheDocument();
+    });
+
+    // Cancel button is the modal's second footer button — anchored regex to
+    // avoid matching any stray "Cancel" on the page.
+    fireEvent.click(screen.getByRole('button', { name: /^Cancel$/ }));
+
+    // Modal tears down and the mutation never fires — abort is clean.
+    await waitFor(() => {
+      expect(screen.queryByRole('heading', { name: /Create Team/i })).not.toBeInTheDocument();
+    });
+    expect(vi.mocked(client.createTeam)).not.toHaveBeenCalled();
+  });
+});

web/src/pages/OnboardingWizard.tsx

@@ -5,6 +5,7 @@ import {
   getIssuers, getAgents, getProfiles, getOwners, getTeams, getPolicies,
   createIssuer, testIssuerConnection,
   createCertificate, triggerRenewal,
+  createTeam, createOwner,
   getApiKey,
 } from '../api/client';
 import { issuerTypes, type IssuerTypeConfig } from '../config/issuerTypes';
@@ -392,6 +393,180 @@ curl -sSL https://raw.githubusercontent.com/shankar0123/certctl/master/install-a
   );
 }
 
+// ─── Step 3 helpers: inline team + owner creation ───
+
+// Inline CreateTeamModal — mirrors TeamsPage.tsx CreateTeamModal pattern.
+// Used inside CertificateStep so users can create a team without leaving the wizard.
+function CreateTeamModalInline({ isOpen, onClose, onCreated }: {
+  isOpen: boolean;
+  onClose: () => void;
+  onCreated: (teamId: string) => void;
+}) {
+  const queryClient = useQueryClient();
+  const [name, setName] = useState('');
+  const [description, setDescription] = useState('');
+  const [error, setError] = useState('');
+
+  const mutation = useMutation({
+    mutationFn: () => createTeam({ name: name.trim(), description: description.trim() }),
+    onSuccess: (team) => {
+      queryClient.invalidateQueries({ queryKey: ['teams'] });
+      setName('');
+      setDescription('');
+      setError('');
+      onCreated(team.id);
+      onClose();
+    },
+    onError: (err: Error) => setError(err.message),
+  });
+
+  if (!isOpen) return null;
+  return (
+    <div className="fixed inset-0 bg-black/40 flex items-center justify-center z-50" onClick={onClose}>
+      <div className="bg-surface border border-surface-border rounded p-5 w-full max-w-md shadow-xl" onClick={e => e.stopPropagation()}>
+        <h2 className="text-lg font-semibold text-ink mb-4">Create Team</h2>
+        {error && <div className="mb-4 p-3 bg-red-50 border border-red-200 rounded text-sm text-red-700">{error}</div>}
+        <form onSubmit={(e) => { e.preventDefault(); if (!name.trim()) return; mutation.mutate(); }} className="space-y-4">
+          <div>
+            <label className="block text-sm font-medium text-ink mb-2">
+              Name <span className="text-red-600">*</span>
+            </label>
+            <input
+              type="text"
+              value={name}
+              onChange={e => setName(e.target.value)}
+              placeholder="Platform Engineering"
+              autoFocus
+              className="w-full px-3 py-2 bg-surface border border-surface-border rounded text-ink placeholder-ink-faint focus:outline-none focus:border-brand-500 transition-colors"
+            />
+          </div>
+          <div>
+            <label className="block text-sm font-medium text-ink mb-2">
+              Description <span className="text-xs text-ink-muted font-normal">(optional)</span>
+            </label>
+            <textarea
+              value={description}
+              onChange={e => setDescription(e.target.value)}
+              rows={3}
+              className="w-full px-3 py-2 bg-surface border border-surface-border rounded text-ink placeholder-ink-faint focus:outline-none focus:border-brand-500 transition-colors"
+            />
+          </div>
+          <div className="flex gap-2 pt-2">
+            <button
+              type="submit"
+              disabled={mutation.isPending || !name.trim()}
+              className="flex-1 btn btn-primary disabled:opacity-50 disabled:cursor-not-allowed"
+            >
+              {mutation.isPending ? 'Creating...' : 'Create Team'}
+            </button>
+            <button type="button" onClick={onClose} className="flex-1 btn btn-ghost">Cancel</button>
+          </div>
+        </form>
+      </div>
+    </div>
+  );
+}
+
+// Inline CreateOwnerModal — mirrors OwnersPage.tsx CreateOwnerModal pattern.
+// Used inside CertificateStep so users can create an owner without leaving the wizard.
+function CreateOwnerModalInline({ isOpen, onClose, onCreated, teams }: {
+  isOpen: boolean;
+  onClose: () => void;
+  onCreated: (ownerId: string) => void;
+  teams: { id: string; name: string }[];
+}) {
+  const queryClient = useQueryClient();
+  const [name, setName] = useState('');
+  const [email, setEmail] = useState('');
+  const [teamId, setTeamId] = useState('');
+  const [error, setError] = useState('');
+
+  const mutation = useMutation({
+    mutationFn: () => createOwner({
+      name: name.trim(),
+      email: email.trim(),
+      team_id: teamId || undefined,
+    }),
+    onSuccess: (owner) => {
+      queryClient.invalidateQueries({ queryKey: ['owners'] });
+      setName('');
+      setEmail('');
+      setTeamId('');
+      setError('');
+      onCreated(owner.id);
+      onClose();
+    },
+    onError: (err: Error) => setError(err.message),
+  });
+
+  if (!isOpen) return null;
+  return (
+    <div className="fixed inset-0 bg-black/40 flex items-center justify-center z-50" onClick={onClose}>
+      <div className="bg-surface border border-surface-border rounded p-5 w-full max-w-md shadow-xl" onClick={e => e.stopPropagation()}>
+        <h2 className="text-lg font-semibold text-ink mb-4">Create Owner</h2>
+        {error && <div className="mb-4 p-3 bg-red-50 border border-red-200 rounded text-sm text-red-700">{error}</div>}
+        <form
+          onSubmit={(e) => {
+            e.preventDefault();
+            if (!name.trim() || !email.trim()) return;
+            mutation.mutate();
+          }}
+          className="space-y-4"
+        >
+          <div>
+            <label className="block text-sm font-medium text-ink mb-2">
+              Name <span className="text-red-600">*</span>
+            </label>
+            <input
+              type="text"
+              value={name}
+              onChange={e => setName(e.target.value)}
+              placeholder="Alice Chen"
+              autoFocus
+              className="w-full px-3 py-2 bg-surface border border-surface-border rounded text-ink placeholder-ink-faint focus:outline-none focus:border-brand-500 transition-colors"
+            />
+          </div>
+          <div>
+            <label className="block text-sm font-medium text-ink mb-2">
+              Email <span className="text-red-600">*</span>
+            </label>
+            <input
+              type="email"
+              value={email}
+              onChange={e => setEmail(e.target.value)}
+              placeholder="alice@example.com"
+              className="w-full px-3 py-2 bg-surface border border-surface-border rounded text-ink placeholder-ink-faint focus:outline-none focus:border-brand-500 transition-colors"
+            />
+          </div>
+          <div>
+            <label className="block text-sm font-medium text-ink mb-2">
+              Team <span className="text-xs text-ink-muted font-normal">(optional)</span>
+            </label>
+            <select
+              value={teamId}
+              onChange={e => setTeamId(e.target.value)}
+              className="w-full px-3 py-2 bg-surface border border-surface-border rounded text-ink focus:outline-none focus:border-brand-500 transition-colors"
+            >
+              <option value="">Unassigned</option>
+              {teams.map(t => <option key={t.id} value={t.id}>{t.name}</option>)}
+            </select>
+          </div>
+          <div className="flex gap-2 pt-2">
+            <button
+              type="submit"
+              disabled={mutation.isPending || !name.trim() || !email.trim()}
+              className="flex-1 btn btn-primary disabled:opacity-50 disabled:cursor-not-allowed"
+            >
+              {mutation.isPending ? 'Creating...' : 'Create Owner'}
+            </button>
+            <button type="button" onClick={onClose} className="flex-1 btn btn-ghost">Cancel</button>
+          </div>
+        </form>
+      </div>
+    </div>
+  );
+}
+
 // ─── Step 3: Add a Certificate ───────────────────────
 
 function CertificateStep({ onNext, onSkip, createdIssuerId }: {
@@ -411,6 +586,10 @@ function CertificateStep({ onNext, onSkip, createdIssuerId }: {
   const [error, setError] = useState('');
   const [created, setCreated] = useState(false);
 
+  // Inline-create modals so users never have to leave the wizard (UX-001).
+  const [teamModalOpen, setTeamModalOpen] = useState(false);
+  const [ownerModalOpen, setOwnerModalOpen] = useState(false);
+
   // C-001: the server requires name, common_name, issuer_id, owner_id,
   // team_id, and renewal_policy_id (handler in
   // internal/api/handler/certificates.go + ManagedCertificate.required in
@@ -553,9 +732,18 @@ function CertificateStep({ onNext, onSkip, createdIssuerId }: {
 
         <div className="grid grid-cols-2 gap-4">
           <div>
-            <label className="block text-sm font-medium text-ink mb-2">
+            <div className="flex items-center justify-between mb-2">
+              <label className="block text-sm font-medium text-ink">
                 Owner <span className="text-red-600">*</span>
               </label>
+              <button
+                type="button"
+                onClick={() => setOwnerModalOpen(true)}
+                className="text-xs text-brand-600 hover:text-brand-700 hover:underline"
+              >
+                + New owner
+              </button>
+            </div>
             <select
               value={ownerId}
               onChange={e => setOwnerId(e.target.value)}
@@ -570,15 +758,32 @@ function CertificateStep({ onNext, onSkip, createdIssuerId }: {
             </select>
             {(owners?.data?.length ?? 0) === 0 && (
               <p className="mt-1 text-xs text-ink-muted">
-                No owners yet — create one from the <Link to="/owners" className="underline hover:text-ink">Owners page</Link> first, then return here.
+                No owners yet —{' '}
+                <button
+                  type="button"
+                  onClick={() => setOwnerModalOpen(true)}
+                  className="underline hover:text-ink"
+                >
+                  create one now
+                </button>
+                .
               </p>
             )}
           </div>
 
           <div>
-            <label className="block text-sm font-medium text-ink mb-2">
+            <div className="flex items-center justify-between mb-2">
+              <label className="block text-sm font-medium text-ink">
                 Team <span className="text-red-600">*</span>
               </label>
+              <button
+                type="button"
+                onClick={() => setTeamModalOpen(true)}
+                className="text-xs text-brand-600 hover:text-brand-700 hover:underline"
+              >
+                + New team
+              </button>
+            </div>
             <select
               value={teamId}
               onChange={e => setTeamId(e.target.value)}
@@ -591,7 +796,15 @@ function CertificateStep({ onNext, onSkip, createdIssuerId }: {
             </select>
             {(teams?.data?.length ?? 0) === 0 && (
               <p className="mt-1 text-xs text-ink-muted">
-                No teams yet — create one from the <Link to="/teams" className="underline hover:text-ink">Teams page</Link> first, then return here.
+                No teams yet —{' '}
+                <button
+                  type="button"
+                  onClick={() => setTeamModalOpen(true)}
+                  className="underline hover:text-ink"
+                >
+                  create one now
+                </button>
+                .
               </p>
             )}
           </div>
@@ -653,6 +866,18 @@ function CertificateStep({ onNext, onSkip, createdIssuerId }: {
           createMutation.isPending
         }
       />
+
+      <CreateTeamModalInline
+        isOpen={teamModalOpen}
+        onClose={() => setTeamModalOpen(false)}
+        onCreated={(id) => setTeamId(id)}
+      />
+      <CreateOwnerModalInline
+        isOpen={ownerModalOpen}
+        onClose={() => setOwnerModalOpen(false)}
+        onCreated={(id) => setOwnerId(id)}
+        teams={(teams?.data ?? []).map(t => ({ id: t.id, name: t.name }))}
+      />
     </div>
   );
 }