Chat now fetches tenant inventory summary (brands, counts, low-stock) and injects it into the AI system prompt so responses prioritize local stock. VIN decoder uses free NHTSA vPIC API to decode 17-char VINs and auto-fills the vehicle selector dropdowns when a catalog match is found. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>