feat(debris): modelo INTACTO→MENGUANDO→0 (sin pop, fade-out por tamaño)

source/game/systems/collision_system.cpp

@@ -74,7 +74,7 @@ namespace Systems::Collision {
                 0.0F,  // sin herencia visual
                 Defaults::Sound::EXPLOSION,
                 COLOR,
-                Defaults::Physics::Debris::ENEMY_LIFETIME,
+                Defaults::Physics::Debris::ENEMY_INTACT_TIME,
                 Defaults::Physics::Debris::ENEMY_FRICTION,
                 Defaults::Physics::Debris::ENEMY_SEGMENT_MULTIPLIER);
         }