Verified that the 5-step interactive onboarding wizard is fully
implemented in dashboard/js/onboard.js:
- Step 1 (30s): Walk phase with amplitude spike highlighting
- Step 2 (10s): Still phase with automatic baseline capture
- Step 3 (15s): Walk-through with Fresnel zone visualization
- Step 4 (15s): Find-me with blob polling and humanoid display
- Step 5 (30s): Interactive placement with GDOP coverage overlay
All narration is jargon-free (no CSI, Fresnel, deltaRMS in user text).
All durations match spec. All 3D integrations working.
