corregit el comptador de FPS

source/core/rendering/sdl_manager.cpp

@@ -433,11 +433,13 @@ void SDLManager::updateFPS(float delta_time) {
         fps_accumulator_ = 0.0f;
 
         // Actualitzar títol de la finestra
-        std::string title = std::format("{} v{} ({}) - {} FPS",
+        std::string vsync_state = (Options::rendering.vsync == 1) ? "ON" : "OFF";
+        std::string title = std::format("{} v{} ({}) - {} FPS - VSync: {}",
             Project::LONG_NAME,
             Project::VERSION,
             Project::COPYRIGHT,
-            fps_display_);
+            fps_display_,
+            vsync_state);
 
         if (finestra_) {
             SDL_SetWindowTitle(finestra_, title.c_str());
@@ -462,6 +464,10 @@ void SDLManager::toggleVSync() {
         SDL_SetRenderVSync(renderer_, Options::rendering.vsync);
     }
 
+    // Reset FPS counter para evitar valores mixtos entre regímenes
+    fps_accumulator_ = 0.0f;
+    fps_frame_count_ = 0;
+
     // Guardar configuració
     Options::saveToFile();
 }