feat(title): destell hiperespacial al VP quan la nau desapareix (sparkle 4-puntes còncau)

source/game/title/ship_animator.cpp

@@ -142,9 +142,14 @@ namespace Title {
                 case ShipState::FLOATING:
                     updateFloating(ship, delta_time);
                     break;
-                case ShipState::EXITING:
+                case ShipState::EXITING: {
                     updateExiting(ship, delta_time);
+                    // Transició a invisible: la nau acaba d'arribar al VP.
+                    if (!ship.visible && on_ship_disappear_) {
+                        on_ship_disappear_(ship.player_id);
+                    }
                     break;
+                }
             }
         }
     }

source/game/title/ship_animator.hpp

@@ -10,6 +10,7 @@
 
 #include <array>
 #include <cstdint>
+#include <functional>
 
 #include "core/graphics/camera3d.hpp"
 #include "core/graphics/wireframe3d.hpp"
@@ -70,10 +71,16 @@ namespace Title {
         [[nodiscard]] auto isAnimationComplete() const -> bool;
         [[nodiscard]] auto isVisible() const -> bool;
 
+        // Callback disparat quan una nau acaba l'EXITING (es torna invisible
+        // al VP). Útil per a un destell que tapi el pop final.
+        using ShipDisappearCallback = std::function<void(int player_id)>;
+        void setOnShipDisappear(ShipDisappearCallback cb) { on_ship_disappear_ = std::move(cb); }
+
        private:
         Rendering::Renderer* renderer_;
         const Graphics::Camera3D* camera_;
         std::array<TitleShip, 2> ships_;
+        ShipDisappearCallback on_ship_disappear_;
 
         static void updateEntering(TitleShip& ship, float delta_time);
         static void updateFloating(TitleShip& ship, float delta_time);