New test validates that presentations AND presenters render on first
navigation when IndexedDB is empty (cold-start scenario).
Test Configuration:
- Demo Session: DOW3h7v6H42 (703) 'How To Do Things'
- Demo Presentation: 7U2eXSjR6H4 (1670) 'Build a House'
- Demo Presenter: gT-hxnifb-0 (2202) 'Bob The Builder'
Tests:
1. UI visibility: Session name, presentation, and presenter all visible
2. IDB integrity: Verifies all nested data written to IndexedDB
Both tests passing - confirms fix works correctly.
