Fix back view: show whenever movingUp, not just during walk anim

Add Gemini LLM support, fix back-view direction, scripted conversation fallbacks

Fix apartment assignment, player sleep, gender profile, and NPC conversations

Reduce LLM call rate: shorter convos, less frequent, hard cap

Fix zombie conversations when LLM is rate-limited

Fix Windows encoding issues: UTF-8 log file and ASCII arrow in logging

Improve social dynamics: gossip, partner preferences, conversation scaling

Initial implementation of Soci city population simulator