fix: Update Window Event Handling and Emulator Destructor Logic

- Added handling for SDL_WINDOWEVENT_RESIZED, SDL_WINDOWEVENT_MINIMIZED, SDL_WINDOWEVENT_HIDDEN, SDL_WINDOWEVENT_RESTORED, and SDL_WINDOWEVENT_SHOWN in the window event processing to improve rendering behavior during window state changes.
- Modified the Emulator destructor to stop emulation without calling Cleanup(), as the renderer is already destroyed, ensuring proper shutdown behavior.

src/app/emu/emulator.cc

@@ -50,7 +50,9 @@ using ImGui::TableNextColumn;
 using ImGui::Text;
 
 Emulator::~Emulator() {
-  Cleanup();
+  // Don't call Cleanup() in destructor - renderer is already destroyed
+  // Just stop emulation
+  running_ = false;
 }
 
 void Emulator::Cleanup() {