iam-pradeepkumar/AURA ? reverse-engineered prompt

Build me a working prototype of this offline disaster survivor detection system for ESP32s.

I want the firmware to run on 4 boards, one board sending WiFi probing frames and the other boards listening for CSI, then sharing results over the ESP NOW mesh with no router or internet needed. It should detect motion, estimate where a person is in the search area, track movement over time, and also try to estimate breathing and heartbeat from the signal. Use the same general processing flow described in the README, with the main signal processing done in C inside the firmware.

Also make the simulator runnable on a laptop so I can test the detection logic without hardware, and add clear setup and deployment instructions for flashing the boards, setting the MAC addresses, and placing the nodes in the field. If any details are unclear, check current ESP IDF docs online and fill in sensible defaults.