feat(players): suport del segon jugador amb events amb player_id

source/game/entities/player.cpp

@@ -222,13 +222,19 @@ void Player::updateFacingAndTurn(float delta_time, float vx, float vy) {
     }
 }
 
-Player::Player(const std::string& anim_key, float x, float y, const Controls& controls, const Map::Info& map_info, int paint_tile_index)
+Player::Player(const std::string& anim_key, int id, float x, float y, const Controls& controls, const Map::Info& map_info, int paint_tile_index)
     : AnimatedSprite(Resource::Cache::get().getAnimationData(anim_key)),
+      id_(id),
       controls_(controls),
       map_(map_info),
       paint_tile_index_(paint_tile_index) {
     setPos(x, y);
-    setCurrentAnimation("stand");
+    // Postura inicial mirant cap al jugador (cara avall), no de costat:
+    // forcem facing_ a DOWN i l'animació `stand_down` abans del primer
+    // frame d'input — el primer `update` la preservarà si l'usuari no
+    // prem cap tecla.
+    facing_ = Facing::DOWN;
+    setCurrentAnimation("stand_down");
 }
 
 void Player::update(float delta_time) {
@@ -308,7 +314,11 @@ void Player::update(float delta_time) {
         if (COL != last_tile_col_ || ROW != last_tile_row_) {
             last_tile_col_ = COL;
             last_tile_row_ = ROW;
-            bus_->publish("on_tile_entered", PaintedTile{.col = COL, .row = ROW, .tile_index = paint_tile_index_});
+            bus_->publish(Event{
+                .name = "on_tile_entered",
+                .payload = PaintedTile{.col = COL, .row = ROW, .tile_index = paint_tile_index_},
+                .player_id = id_,
+            });
         }
     }
 }