feat(issue-17): add onboarding wizard for new users (#26)

* feat(issue-17): add onboarding wizard for new users

Adds a step-based onboarding wizard that guides new users through their
first Claw3D setup: welcome, prerequisites, gateway connection, agent
discovery, and a completion screen.

Architecture:

src/features/onboarding/ (new feature module):
  - types.ts: Step definitions, navigation helpers (getNextStep/getPrevStep)
  - useOnboardingState.ts: localStorage-backed persistence hook
  - index.ts: Barrel exports for clean imports
  - components/OnboardingWizard.tsx: Main wizard container with step
    navigation, progress bar, and modal overlay
  - components/WelcomeStep.tsx: Feature highlights grid
  - components/PrerequisitesStep.tsx: Checklist with links/commands
  - components/ConnectStep.tsx: Compact gateway connection form
  - components/AgentsStep.tsx: Agent discovery feedback
  - components/CompleteStep.tsx: Final screen with CTA

Design decisions:
  - Modular step system: new steps can be added by extending
    OnboardingStepId and registering a component in the switch
  - localStorage persistence: wizard shows once per browser, resettable
    from settings (future: wire into Studio settings API)
  - Connect step gates forward navigation: users cannot skip connection
  - Follows Claw3D conventions: feature-first module, no shared state
    pollution, Tailwind utility classes, lucide-react icons
  - Does NOT modify existing routes or components — zero-risk integration
    (parent wiring left to maintainer preference)

Integration guide (for maintainer):
  1. Import { OnboardingWizard, useOnboardingState } from the module
  2. Add useOnboardingState() to the root layout or agents page
  3. Render <OnboardingWizard /> when showOnboarding is true
  4. Pass gateway connection props from existing store

tests/unit/onboardingTypes.test.ts (13 tests):
  - Step structure validation, navigation helpers, ordering

tests/unit/onboardingState.test.ts (5 tests):
  - localStorage persistence, show/hide/reset lifecycle

Addresses #17

* fix(onboarding): wire wizard launch into office UI

Mount the onboarding wizard in OfficeScreen and add a settings action that can re-open it so the new-user flow is reachable and testable.

Made-with: Cursor

---------

Co-authored-by: Neo <neo@openclaw.ai>
Co-authored-by: iamlukethedev <lucas.guilherme@smartwayslfl.com>

src/features/onboarding/components/CompleteStep.tsx

@@ -0,0 +1,38 @@
+/**
+ * CompleteStep — Final wizard screen before entering the office.
+ */
+import { Building2, Rocket } from "lucide-react";
+
+export const CompleteStep = () => (
+  <div className="flex flex-col items-center justify-center gap-5 py-4">
+    <div className="flex h-14 w-14 items-center justify-center rounded-full bg-emerald-500/15">
+      <Rocket className="h-7 w-7 text-emerald-400" />
+    </div>
+
+    <div className="space-y-2 text-center">
+      <p className="text-base font-semibold text-white">
+        Welcome to your AI office
+      </p>
+      <p className="max-w-sm text-sm text-white/60">
+        Your gateway is connected and your agents are ready. Step inside and
+        explore the 3D workspace where your AI team operates.
+      </p>
+    </div>
+
+    <div className="w-full max-w-xs space-y-2">
+      <div className="flex items-center gap-2.5 rounded-lg border border-white/8 bg-white/[0.03] px-3.5 py-2.5">
+        <Building2 className="h-4 w-4 shrink-0 text-emerald-400" />
+        <div>
+          <p className="text-xs font-medium text-white">Explore the Office</p>
+          <p className="text-[10px] text-white/45">
+            Navigate rooms, watch agents, and interact
+          </p>
+        </div>
+      </div>
+    </div>
+
+    <p className="text-[11px] text-white/35">
+      You can always re-run onboarding from Studio settings.
+    </p>
+  </div>
+);