Enhance testing framework and UI integration for YAZE

- Added a comprehensive testing framework with support for unit, integration, and UI tests, improving overall test coverage and reliability.
- Integrated ImGui Test Engine for UI testing, allowing for real-time feedback and visualization of test results.
- Updated CMake configuration to conditionally include testing components based on build options, enhancing flexibility for developers.
- Introduced a new command in the CLI for running asset loading tests on ROMs, providing a straightforward way to validate functionality.
- Enhanced error handling and resource management during testing, ensuring stability and clarity in test execution.
- Improved user interface with a dedicated test dashboard for monitoring test progress and results, enhancing developer experience.

src/app/gfx/arena.cc

@@ -18,7 +18,21 @@ Arena::Arena() {
 }
 
 Arena::~Arena() {
+  // Safely clear all resources with proper error checking
+  for (auto& [key, texture] : textures_) {
+    // Don't rely on unique_ptr deleter during shutdown - manually manage
+    if (texture && key) {
+      [[maybe_unused]] auto* released = texture.release(); // Release ownership to prevent double deletion
+    }
+  }
   textures_.clear();
+  
+  for (auto& [key, surface] : surfaces_) {
+    // Don't rely on unique_ptr deleter during shutdown - manually manage
+    if (surface && key) {
+      [[maybe_unused]] auto* released = surface.release(); // Release ownership to prevent double deletion
+    }
+  }
   surfaces_.clear();
 }
 
@@ -56,6 +70,16 @@ void Arena::FreeTexture(SDL_Texture* texture) {
   }
 }
 
+void Arena::Shutdown() {
+  // Clear all resources safely - let the unique_ptr deleters handle the cleanup
+  // while SDL context is still available
+  
+  // Just clear the containers - the unique_ptr destructors will handle SDL cleanup
+  // This avoids double-free issues from manual destruction
+  textures_.clear();
+  surfaces_.clear();
+}
+
 void Arena::UpdateTexture(SDL_Texture* texture, SDL_Surface* surface) {
   if (!texture || !surface) {
     SDL_Log("Invalid texture or surface passed to UpdateTexture");
@@ -104,6 +128,7 @@ SDL_Surface* Arena::AllocateSurface(int width, int height, int depth,
   return surface;
 }
 
+
 void Arena::FreeSurface(SDL_Surface* surface) {
   if (!surface) return;