refactor(RHI): 完成 Shader uniform 设置迁移到 CommandList

- 删除 RHIShader 的 OpenGL 风格 SetMat4/SetVec3/SetInt 等方法
- 添加 UniformInfo 结构体和 GetUniformInfos/GetUniformInfo 接口
- D3D12Shader 和 OpenGLShader 实现 CacheUniformInfos
- RHICommandList 添加 SetUniform*/SetGlobal* 统一接口
- D3D12 实现 D3D12PipelineLayout 管理 root signature 映射
- 修复 D3D12CommandList::SetPipelineStateInternal 在 Reset 后未重新应用 root signature 的问题
- 更新 OpenGL 集成测试使用新的 SetUniform* API
- 所有单元测试和集成测试通过 (8/8 integration tests)

tests/RHI/OpenGL/integration/quad/main.cpp

@@ -161,7 +161,8 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
     }
     Log("[INFO] Shaders compiled successfully");
 
-    shader.SetInt("uTexture", 0);
+    commandList.SetShader(&shader);
+    commandList.SetUniformInt("uTexture", 0);
 
     OpenGLPipelineState pipelineState;
     OpenGLRasterizerState rasterizerState;

tests/RHI/OpenGL/integration/sphere/main.cpp

@@ -283,10 +283,11 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
     int viewLoc = shader.GetUniformLocation("gViewMatrix");
     int projLoc = shader.GetUniformLocation("gProjectionMatrix");
     Log("[DEBUG] Uniform locations - gModelMatrix: %d, gViewMatrix: %d, gProjectionMatrix: %d", modelLoc, viewLoc, projLoc);
-    shader.SetMat4("gModelMatrix", modelMatrix);
-    shader.SetMat4("gViewMatrix", viewMatrix);
-    shader.SetMat4("gProjectionMatrix", projectionMatrix);
-    shader.SetInt("uTexture", 0);
+    commandList.SetShader(&shader);
+    commandList.SetUniformMat4("gModelMatrix", modelMatrix);
+    commandList.SetUniformMat4("gViewMatrix", viewMatrix);
+    commandList.SetUniformMat4("gProjectionMatrix", projectionMatrix);
+    commandList.SetUniformInt("uTexture", 0);
 
     OpenGLTexture texture;
     if (!texture.LoadFromFile("Res/Image/earth.png", true)) {

tests/RHI/OpenGL/unit/test_shader.cpp

@@ -1,5 +1,6 @@
 #include "fixtures/OpenGLTestFixture.h"
 #include "XCEngine/RHI/OpenGL/OpenGLShader.h"
+#include "XCEngine/RHI/OpenGL/OpenGLCommandList.h"
 
 using namespace XCEngine::RHI;
 
@@ -102,15 +103,17 @@ TEST_F(OpenGLTestFixture, Shader_SetUniforms) {
     shader.Compile(vs, fs);
     ASSERT_TRUE(shader.IsValid());
     
-    shader.Use();
+    auto cmdList = static_cast<OpenGLCommandList*>(GetDevice()->CreateCommandList(CommandListDesc{}));
+    ASSERT_NE(cmdList, nullptr);
     
-    shader.SetInt("uIntValue", 42);
-    shader.SetFloat("uFloatValue", 3.14f);
-    shader.SetVec3("uVec3Value", 1.0f, 2.0f, 3.0f);
+    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;
-    shader.SetMat4("uMat4Value", mat);
+    cmdList->SetUniformMat4("uMat4Value", mat);
     
     GLenum error = glGetError();
     EXPECT_EQ(error, GL_NO_ERROR);