fix(animation): preserve wire motion on every spawn path

Replace the door-specific static-animation seed with one retail description-then-enter-world initializer shared by normal and reactive spawns. This preserves authoritative Dead and On/Off states, prevents replacement corpses from returning to Ready, and pins the lifecycle with Core and App tests.

Co-Authored-By: Codex <codex@openai.com>

docs/ISSUES.md

@@ -46,6 +46,39 @@ Copy this block when adding a new issue:
 
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+## #204 — Replacement corpses replay the death transition and stand back up
+
+**Status:** DONE — 2026-07-12, user visually confirmed multiple corpses remain fallen
+**Severity:** HIGH
+**Component:** live entities / animation / CreateObject lifecycle
+
+**Description:** A killed monster played its death animation correctly, but
+when ACE replaced the victim object with its lootable corpse, the body visibly
+returned to the standing pose and replayed the fall.
+
+**Root cause:** Six-object live trace proved ACE sent every corpse CreateObject
+with the correct `NonCombat + Dead` motion. A follow-up trace after the first
+correction showed the replacement corpse nevertheless completed `Ready`: its
+persistent Dead rest pose is static, so it bypassed the normal multi-frame
+spawn branch and entered the broader #187 reactive branch. That branch had
+been generalized from doors by its gate but still hard-coded Door On/Off from
+`PhysicsState`; for a corpse those commands did not select a cycle, leaving the
+motion-table default Ready and producing the hard upright pop.
+
+**Resolution:** Both live-spawn branches now use one data-driven initializer.
+It installs the motion-table default, applies the authoritative MovementData
+stance/command, and then calls `MotionTableManager.HandleEnterWorld()` exactly
+like retail's description-then-enter-world lifecycle. No corpse or door type
+switch remains. App tests pin Dead and Door On/Off wire-state resolution; a
+Core conformance test pins removal of the detached Ready→Dead link before the
+first rendered tick.
+
+**Research:** `docs/research/2026-07-12-death-and-auto-target-pseudocode.md`
+
+**Acceptance:** Kill several monsters. Each falls once, is replaced by a
+lootable corpse in the same fallen pose, and never visibly stands between the
+victim deletion and corpse display.
+
 ## #203 — Unequipping armor freezes character and world animations — FIXED
 
 **Status:** DONE — 2026-07-11 (this change)