Mechanism validated, reproduction PENDING. The lifecycle composes spatially: infection seeds I cells (■), infected-death converts them to a dead core (■, n_D 0→14 over 200 updates), and Allee recovery returns some dead cells to healthy on local contact (3 organic D→H events). Population is conserved every step; direct H→D Allee death stays genuinely rare (0 events, not a bug). Dominant death path is infection. No Fig 3B/5/7 target is claimed (deferred to the capstone).