chore: snapshot editor work and restore tests

Key points:\n- restore the tests tree removed by bc47e6e\n- capture current editor workspace, scene, and docs reshuffle changes\n- keep local cloud.nvdb resources ignored from this commit

tests/RHI/D3D12/unit/test_command_allocator.cpp

@@ -0,0 +1,35 @@
+#include "fixtures/D3D12TestFixture.h"
+#include "XCEngine/RHI/D3D12/D3D12CommandAllocator.h"
+
+using namespace XCEngine::RHI;
+
+TEST_F(D3D12TestFixture, CommandAllocator_Reset_Basic) {
+    auto allocator = std::make_unique<D3D12CommandAllocator>();
+    ASSERT_TRUE(allocator->Initialize(GetDevice()->GetDevice(), CommandQueueType::Direct));
+    
+    allocator->Reset();
+    EXPECT_TRUE(allocator->IsReady());
+}
+
+TEST_F(D3D12TestFixture, CommandAllocator_Reset_Multiple) {
+    auto allocator = std::make_unique<D3D12CommandAllocator>();
+    ASSERT_TRUE(allocator->Initialize(GetDevice()->GetDevice(), CommandQueueType::Direct));
+    
+    for (int i = 0; i < 10; ++i) {
+        allocator->Reset();
+        EXPECT_TRUE(allocator->IsReady());
+    }
+}
+
+TEST_F(D3D12TestFixture, CommandAllocator_Create_DifferentTypes) {
+    CommandQueueType types[] = {
+        CommandQueueType::Direct,
+        CommandQueueType::Compute,
+        CommandQueueType::Copy
+    };
+    
+    for (auto type : types) {
+        auto allocator = std::make_unique<D3D12CommandAllocator>();
+        ASSERT_TRUE(allocator->Initialize(GetDevice()->GetDevice(), type));
+    }
+}