Scribble lab: all 4 scenarios with Spec Kit artifacts

[kathi-everest]

Summary

Implements all 4 Scribble lab scenarios with Spec Kit artifacts:

• Scenario 1: Host tracking, validation, lobby polling (~2s), host-only start (2+ players)
• Scenario 2: Name validation, drawer assignment, deterministic secret word, drawer-only visibility
• Scenario 3: Interactive canvas, clear, guess sync, case-insensitive scoring (+100 correct)
• Scenario 4: Shared result state, host restart to lobby with players preserved

Includes constitution, 4 feature spec/plan/task groups, discovery notes, and reflection.

Contributor

• Email: kathiressan.sivanes@everest.engineering
• Role:
  • Product
  • Developer