Phase 1 B3: enemies die with a corpse window instead of popping out of existence

Server: HealthApplyDamageSystem marks EnemyTag Dying{UntilTick} (TickUtil.
NonZero, ~54 ticks) on the lethal 0-crossing instead of instant destroy,
zeroes every live cue (replicated AttackWindup, LungeState + IsLunging bit,
KnockbackState), destroys on expiry; plain-world tests keep instant destroy
(no NetworkTime) so the suite's assertions stay meaningful.

Every consumer now ignores corpses (all confirmed entity-count/unfiltered by
the design review): EnemyAISystem all 4 passes, BossAISystem brain + summon
cap, RoomEnemyDirector room-clear + MaxAlive fit, WaveSystem cap + cleared,
CyclePhaseSystem breach wipe + DefendCleared, ThreatDirector timeout cull,
TurretFire targeting, CoreDamage drain, ProjectileDamage snapshot (corpses
are not shields), AbilityFire auto-aim candidates, debug cull + telemetry.
Wipe passes skip Dying to avoid cross-ECB double-destroys.

Client: EnemyAnimationDriveSystem finally drives the controller's IsDead
param (Health.Current<=0 is the replicated death read; corpse locomotion
zeroed); CombatFeedbackSystem moves the kill CRUNCH to the 0-crossing (the
prune-edge timing would land it ~1 s late) - the prune keeps a small
dissolve puff for corpses and the legacy full read for alive-vanish culls.

456/456 EditMode.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Assets/_Project/Scripts/Server/World/CyclePhaseSystem.cs

@@ -107,7 +107,7 @@ namespace ProjectM.Server
                     // Slice 3: cull the BASE wave only — an Expedition wave runs in its own region and must
                     // survive a base Core breach. A region-blind EnemyTag wipe would also spuriously trip the
                     // zone director's aliveZone==0 clear/reward edge. Mirrors ThreatDirectorSystem + DefendCleared.
-                    foreach (var (hr, he) in SystemAPI.Query<RefRO<RegionTag>>().WithAll<EnemyTag>().WithEntityAccess())
+                    foreach (var (hr, he) in SystemAPI.Query<RefRO<RegionTag>>().WithAll<EnemyTag>().WithNone<Dying>().WithEntityAccess()) // skip corpses: the B3 expiry pass owns their destroy (cross-ECB double-destroy)
                         if (hr.ValueRO.Region == RegionId.Base)
                             ecb.DestroyEntity(he);
                     ecb.Playback(state.EntityManager);
@@ -185,7 +185,7 @@ namespace ProjectM.Server
             // Cleared only when no BASE husk remains: expedition zone enemies (EnemyTag + RegionTag{Expedition})
             // must not hold the base siege open (DR-040 BLOCKER 3 — same global-count soft-lock as WaveSystem).
             int baseHusks = 0;
-            foreach (var hr in SystemAPI.Query<RefRO<RegionTag>>().WithAll<EnemyTag>())
+            foreach (var hr in SystemAPI.Query<RefRO<RegionTag>>().WithAll<EnemyTag>().WithNone<Dying>()) // LIVING only (B3)
                 if (hr.ValueRO.Region == RegionId.Base) baseHusks++;
             return wave.WaveNumber > defendStartWave
                    && wave.RemainingToSpawn == 0