feat(lighting): seed estable per emissor (no deriva pel moviment)

source/game/scenes/game_scene.cpp

@@ -1022,13 +1022,13 @@ void GameScene::applyLightingPass() {
     for (const auto& p : players_) {
         if (p->isOutOfPlay()) { continue; }
         const auto C = p->getLightCenter();
-        emitters.push_back({.cx = C.x, .cy = C.y, .radius = PLAYER_R, .flicker = PLAYER_FLICKER});
+        emitters.push_back({.cx = C.x, .cy = C.y, .radius = PLAYER_R, .seed = p->getLightSeed(), .flicker = PLAYER_FLICKER});
     }
     for (const auto* e : entity_manager_.getEntities()) {
         const int R = e->getLightRadius();
         if (R <= 0) { continue; }
         const auto C = e->getLightCenter();
-        emitters.push_back({.cx = C.x, .cy = C.y, .radius = R, .flicker = e->getLightFlicker()});
+        emitters.push_back({.cx = C.x, .cy = C.y, .radius = R, .seed = e->getLightSeed(), .flicker = e->getLightFlicker()});
     }
     Lighting::apply(Screen::get().getCanvasArgb(),
         Screen::get().getCanvasWidth(),