fix: Resolve shader initialization crashes and build errors

Fixes crashes in demo64k and test_3d_render caused by uninitialized ShaderComposer. Moves InitShaderComposer() call before effect initialization in gpu.cc and adds explicit call in test_3d_render.cc. Also fixes include paths for generated assets.h in multiple files.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/gpu/effects/shaders.h b/src/gpu/effects/shaders.h
index a23c41c..f8e45ba 100644
--- a/src/gpu/effects/shaders.h
+++ b/src/gpu/effects/shaders.h
@@ -1,8 +1,11 @@
 // This file is part of the 64k demo project.
-// It declares the WGSL shader strings.
+// It declares the WGSL shader strings and initialization function.
 
 #pragma once
 
+// Initializes the ShaderComposer with snippet assets.
+void InitShaderComposer();
+
 // Shader declarations (defined in shaders.cc)
 extern const char* main_shader_wgsl;
 extern const char* particle_compute_wgsl;