[Phase 1] Playground Examples

[prosdev]

Description

Add working examples for all display condition plugins to the playground.

Tasks

• Create exit intent demo page
• Create scroll depth demo page
• Create page visits demo page
• Create time delay demo page
• Create combined triggers demo page
• Add explainability views (decision, trace, context)
• Add reset buttons for testing
• Update homepage with new examples

Acceptance Criteria

• One demo per plugin
• Combined demo showing composition
• Explainability visible
• Easy to test and debug
• Mobile-friendly

Reference

• Playground: https://xp-examples.vercel.app/
• specs/phase-1-display-conditions/plan.md (Playground)
• specs/phase-1-display-conditions/tasks.md (Task 14)