chore: checkpoint current workspace changes

tests/UI/Core/integration/input/CMakeLists.txt

@@ -1,11 +1,18 @@
+add_subdirectory(drag_drop_basic)
 add_subdirectory(keyboard_focus)
 add_subdirectory(popup_menu_overlay)
 add_subdirectory(pointer_states)
 add_subdirectory(scroll_view)
 add_subdirectory(shortcut_scope)
 
+add_custom_target(core_ui_drag_drop_contract_validation
+    DEPENDS
+        core_ui_input_drag_drop_basic_validation
+)
+
 add_custom_target(core_ui_input_integration_tests
     DEPENDS
+        core_ui_input_drag_drop_basic_validation
         core_ui_input_keyboard_focus_validation
         core_ui_input_popup_menu_overlay_validation
         core_ui_input_pointer_states_validation

tests/UI/Core/integration/input/drag_drop_basic/CMakeLists.txt

@@ -0,0 +1,35 @@
+set(CORE_UI_INPUT_DRAG_DROP_BASIC_RESOURCES
+    View.xcui
+    ${CMAKE_SOURCE_DIR}/tests/UI/Core/integration/shared/themes/core_validation.xctheme
+)
+
+add_executable(core_ui_input_drag_drop_basic_validation WIN32
+    main.cpp
+    ${CORE_UI_INPUT_DRAG_DROP_BASIC_RESOURCES}
+)
+
+target_include_directories(core_ui_input_drag_drop_basic_validation PRIVATE
+    ${CMAKE_SOURCE_DIR}/tests/UI/Core/integration/shared/src
+    ${CMAKE_SOURCE_DIR}/engine/include
+)
+
+target_compile_definitions(core_ui_input_drag_drop_basic_validation PRIVATE
+    UNICODE
+    _UNICODE
+)
+
+if(MSVC)
+    target_compile_options(core_ui_input_drag_drop_basic_validation PRIVATE /utf-8 /FS)
+    set_property(TARGET core_ui_input_drag_drop_basic_validation PROPERTY
+        MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL")
+endif()
+
+target_link_libraries(core_ui_input_drag_drop_basic_validation PRIVATE
+    core_ui_integration_host
+)
+
+set_target_properties(core_ui_input_drag_drop_basic_validation PROPERTIES
+    OUTPUT_NAME "XCUICoreDragDropContractValidation"
+)
+
+source_group(TREE "${CMAKE_CURRENT_SOURCE_DIR}" FILES View.xcui)

tests/UI/Core/integration/input/drag_drop_basic/View.xcui

@@ -0,0 +1,19 @@
+<View
+  name="CoreInputDragDropContract"
+  theme="../../shared/themes/core_validation.xctheme">
+  <Column padding="24" gap="16">
+    <Card
+      title="测试内容：Core Drag / Drop Contract"
+      subtitle="只验证 Core 层拖拽原语本身：激活阈值、target accept/reject、release 完成、以及 Escape / focus lost 取消。"
+      tone="accent"
+      height="206">
+      <Column gap="8">
+        <Text text="1. 按住左侧任一 source 后不要立刻松开；只有拖过激活阈值后才会进入 active。" />
+        <Text text="2. 将 Texture Asset 拖到 Project Browser，应显示 accept，预览操作应解析为 Copy。" />
+        <Text text="3. 将 Texture Asset 拖到 Hierarchy Parent，应显示 reject；此时松开只会取消，不会完成 drop。" />
+        <Text text="4. 将 Scene Entity 拖到 Hierarchy Parent，应显示 accept；松开后应完成 Move。" />
+        <Text text="5. active 期间按 Esc，或切走窗口触发 focus lost，应立即取消当前 drag。" />
+      </Column>
+    </Card>
+  </Column>
+</View>

tests/UI/Core/integration/input/drag_drop_basic/captures/.gitkeep

@@ -0,0 +1 @@
+

tests/UI/Core/integration/input/drag_drop_basic/main.cpp

@@ -0,0 +1,8 @@
+#include "Application.h"
+
+int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE, LPWSTR, int nCmdShow) {
+    return XCEngine::Tests::CoreUI::RunCoreUIValidationApp(
+        hInstance,
+        nCmdShow,
+        "core.input.drag_drop_basic");
+}