refactor(debris): la bala impacta al cos O als trossos, mai a tots dos

source/game/scenes/game_scene.cpp

@@ -580,7 +580,7 @@ auto GameScene::buildCollisionContext() -> Systems::Collision::Context {
         .firework_manager = firework_manager_,
         .floating_score_manager = floating_score_manager_,
         .match_config = match_config_,
-        .on_player_hit = [this](uint8_t pid) { tocado(pid); },
+        .on_player_hit = [this](uint8_t pid, const Vec2& bv) { tocado(pid, bv); },
     };
 }
 
@@ -764,7 +764,7 @@ void GameScene::drawLevelCompletedState() {
     drawScoreboard();
 }
 
-void GameScene::tocado(uint8_t player_id) {
+void GameScene::tocado(uint8_t player_id, const Vec2& bullet_velocity) {
     // Death sequence: 3 phases
     // Phase 1: First call (hit_timer_per_player_[player_id] == 0) - trigger explosion
     // Phase 2: Animation (0 < itocado_ < 3.0s) - debris animation
@@ -788,6 +788,9 @@ void GameScene::tocado(uint8_t player_id) {
 
         // Mateixa dispersió i efecte que els debris d'enemic (lifetime,
         // friction, segment_multiplier alineats); només canvien sound i color.
+        // bullet_velocity arriba a explode() com a impuls extra independent
+        // de la inèrcia del cos del ship — els trossos volen amb la força
+        // de la bala encara que el ship estiga quiet.
         debris_manager_.explode(
             ships_[player_id].getShape(),
             SHIP_POS,
@@ -802,7 +805,8 @@ void GameScene::tocado(uint8_t player_id) {
             ships_[player_id].getConfig().colors.normal,
             Defaults::Physics::Debris::ENEMY_LIFETIME,
             Defaults::Physics::Debris::ENEMY_FRICTION,
-            Defaults::Physics::Debris::ENEMY_SEGMENT_MULTIPLIER);
+            Defaults::Physics::Debris::ENEMY_SEGMENT_MULTIPLIER,
+            bullet_velocity);
 
         // Start death timer (non-zero to avoid re-triggering)
         hit_timer_per_player_[player_id] = Defaults::Game::HIT_TIMER_TRIGGER_DEATH;