feat(enemy): els enemics poden disparar bales via tick d'IA

source/game/scenes/game_scene.hpp

@@ -28,6 +28,7 @@
 #include "game/entities/ship.hpp"
 #include "game/stage_system/stage_config.hpp"
 #include "game/stage_system/stage_manager.hpp"
+#include "game/systems/collision_system.hpp"
 
 // Game over state machine
 enum class GameOverState : uint8_t {
@@ -67,7 +68,7 @@ class GameScene final : public Scene {
     std::array<Enemy, Constants::MAX_ORNIS> enemies_;
     // 6 balas: P1=[0,1,2], P2=[3,4,5]. El cast a size_t evita la
     // widening conversion implícita que detecta clang-tidy.
-    std::array<Bullet, static_cast<std::size_t>(Constants::MAX_BULLETS) * 2> bullets_;
+    std::array<Bullet, static_cast<std::size_t>(Defaults::Entities::MAX_BULLETS_TOTAL)> bullets_;
     std::array<float, 2> hit_timer_per_player_;  // Death timers per player (seconds)
 
     // Lives and game over system
@@ -144,6 +145,10 @@ class GameScene final : public Scene {
     void runStageLevelStart(float delta_time);
     void runStagePlaying(float delta_time);
     void runStageLevelCompleted(float delta_time);
+    // Construeix el Collision::Context del frame actual (referències a tots els
+    // pools/managers + on_player_hit). Reutilitzat tant per al tick d'IA com
+    // per a runCollisionDetections.
+    [[nodiscard]] auto buildCollisionContext() -> Systems::Collision::Context;
     // Helper: ejecuta colisiones de gameplay con el Context preparado.
     void runCollisionDetections();
 };