Wires the existing internal/flavor TwinBee GM pools into the !zone
state machine. Adds GMNarrationType, mood band derivation, the §3.2
mood-event delta table, and ±2/hr passive decay toward 50. Zone enter
narrates the entry room; advance narrates each subsequent room (boss
rooms use the named BossEntry* pools, completion uses ZoneComplete
and applies MoodEventZoneComplete). Line selection is deterministic
on (runID, roomIdx) so repeat reads render the same prose.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
