Three fixes to make the gameplay loop functional end-to-end:
- Add Interactable component to NPC spawn so E-prompt detection works
- Build monologue trigger system (enter_location + time_idle) with
MonologueBuffer/MonologueState components, wire through ObserverSnapshot
as current_monologue field, decode on client and display via HUD
- Change PlayerAction::Interact from unit to struct variant carrying
optional target_entity_id and verb fields
Bumps protocol version from 4 to 5. Regenerates MessagePack fixtures.
All 200 tests pass (170 unit + 30 integration).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>