test: Add RHI integration tests and update unit tests

- Add CommandQueue unit tests for WaitForIdle and synchronization
- Add SwapChain unit tests for Present and buffer operations
- Add Texture unit tests for various texture types and mipmaps
- Fix RHIIntegrationFixture with proper logging and debug output
- Update minimal integration test with RHI abstraction layer
- Add GT reference image for minimal test
- Update TEST_SPEC.md documentation

tests/RHI/OpenGL/unit/test_shader.cpp

@@ -83,40 +83,3 @@ TEST_F(OpenGLTestFixture, Shader_Compile_InvalidSource) {
     
     shader.Shutdown();
 }
-
-TEST_F(OpenGLTestFixture, Shader_SetUniforms) {
-    const char* vs = R"(
-        #version 330 core
-        void main() { gl_Position = vec4(0.0); }
-    )";
-    const char* fs = R"(
-        #version 330 core
-        uniform int uIntValue;
-        uniform float uFloatValue;
-        uniform vec3 uVec3Value;
-        uniform mat4 uMat4Value;
-        out vec4 FragColor;
-        void main() { FragColor = vec4(1.0); }
-    )";
-    
-    OpenGLShader shader;
-    shader.Compile(vs, fs);
-    ASSERT_TRUE(shader.IsValid());
-    
-    auto cmdList = static_cast<OpenGLCommandList*>(GetDevice()->CreateCommandList(CommandListDesc{}));
-    ASSERT_NE(cmdList, nullptr);
-    
-    cmdList->SetShader(&shader);
-    cmdList->SetUniformInt("uIntValue", 42);
-    cmdList->SetUniformFloat("uFloatValue", 3.14f);
-    cmdList->SetUniformVec3("uVec3Value", 1.0f, 2.0f, 3.0f);
-    
-    float mat[16] = {};
-    mat[0] = 1.0f; mat[5] = 1.0f; mat[10] = 1.0f; mat[15] = 1.0f;
-    cmdList->SetUniformMat4("uMat4Value", mat);
-    
-    GLenum error = glGetError();
-    EXPECT_EQ(error, GL_NO_ERROR);
-    
-    shader.Shutdown();
-}