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rUv
c453268002
Both triage paths in the Mass Casualty Assessment tool classified a survivor as Deceased (Black) on "no breathing + no movement" while completely ignoring the heartbeat signal: - domain `TriageCalculator::calculate` → `combine_assessments(Absent, None)` returned Deceased. That branch is in fact only reachable *because* a heartbeat makes `has_vitals()` true (breathing+movement absent alone → Unknown) — so every "Deceased" was a live person with a pulse. - detection `EnsembleClassifier::determine_triage` (the path used by `classify()`) returned Deceased on `!has_breathing && !has_movement`, also ignoring `reading.heartbeat`. A survivor with a detectable pulse but no sensed breathing/movement is in respiratory arrest — the most time-critical *savable* state. Reporting them Deceased would deprioritize a rescuable person. WiFi-CSI also cannot confirm death (no airway-repositioning step), so a pulse must override. Fix: in both paths, if the result would be Deceased but a heartbeat is present, return Immediate. Total absence of breathing, movement AND heartbeat is unchanged (domain → Unknown, ensemble → Deceased). 2 safety regression tests added. Full MAT suite: 168 + 6 + 3 passed, 0 failed (existing test_no_vitals_is_deceased still green — no heartbeat → Deceased).