feat(xcui): advance core and editor validation flow

tests/UI/Core/integration/CMakeLists.txt

@@ -1 +1,13 @@
-add_custom_target(core_ui_integration_tests)
+add_subdirectory(shared)
+add_subdirectory(input)
+add_subdirectory(layout)
+add_subdirectory(style)
+add_subdirectory(text)
+
+add_custom_target(core_ui_integration_tests
+    DEPENDS
+        core_ui_input_integration_tests
+        core_ui_layout_integration_tests
+        core_ui_style_integration_tests
+        core_ui_text_integration_tests
+)

tests/UI/Core/integration/README.md

@@ -1,8 +1,24 @@
-# Core UI Integration Notes
+# Core UI Integration Validation
 
-The core XCUI lane currently validates shared primitives through automated unit tests.
+This directory contains the manual XCUI validation system for shared Core primitives.
 
-Interactive validation belongs to:
+Structure:
 
-- `tests/UI/Runtime/integration/` for game/runtime UI
-- `tests/UI/Editor/integration/` for editor UI
+- `shared/`: shared host, native renderer, screenshot helper, scenario registry
+- `input/`: shared input validation category
+- `layout/`: shared layout validation category
+- `style/`: shared theme token and style resolution validation category
+- `text/`: shared UTF-8 text rendering and textInput focus marker validation category
+
+Rules:
+
+- One scenario directory maps to one executable.
+- Do not accumulate unrelated checks into one monolithic app.
+- Shared infrastructure belongs in `shared/`, not duplicated per scenario.
+- Screenshots are stored per scenario inside that scenario's `captures/` folder.
+
+Build:
+
+```bash
+cmake --build build --config Debug --target core_ui_integration_tests
+```

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

@@ -0,0 +1,12 @@
+add_subdirectory(keyboard_focus)
+add_subdirectory(pointer_states)
+add_subdirectory(scroll_view)
+add_subdirectory(shortcut_scope)
+
+add_custom_target(core_ui_input_integration_tests
+    DEPENDS
+        core_ui_input_keyboard_focus_validation
+        core_ui_input_pointer_states_validation
+        core_ui_input_scroll_view_validation
+        core_ui_input_shortcut_scope_validation
+)

tests/UI/Core/integration/input/README.md

@@ -0,0 +1,8 @@
+# Core Input Integration
+
+这个分类只放共享 XCUI 输入能力的手工验证场景。
+
+规则：
+- 一个场景目录对应一个独立 exe
+- 共享宿主层只放在 `integration/shared/`
+- 不允许把多个无关检查点塞进同一个 exe

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

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

tests/UI/Core/integration/input/keyboard_focus/README.md

@@ -0,0 +1,15 @@
+# Keyboard Focus Validation
+
+可执行 target：
+- `core_ui_input_keyboard_focus_validation`
+
+运行：
+```bash
+build\tests\UI\Core\integration\input\keyboard_focus\Debug\XCUICoreInputKeyboardFocusValidation.exe
+```
+
+检查点：
+1. 按 `Tab`，焦点依次切换三个按钮。
+2. 按 `Shift+Tab`，焦点反向切换。
+3. 按 `Enter` 或 `Space`，当前 `focus` 按钮进入 `active`。
+4. 松开按键后，`active` 清空。

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

@@ -0,0 +1,30 @@
+<View
+  name="CoreInputKeyboardFocus"
+  theme="../../shared/themes/core_validation.xctheme">
+  <Column padding="24" gap="16">
+    <Card
+      title="Core Validation | Keyboard Focus"
+      subtitle="当前批次：Tab 焦点遍历 | Enter / Space 激活"
+      tone="accent"
+      height="90">
+      <Column gap="8">
+        <Text text="这是 Core 层验证场景，不承载 runtime 游戏 UI。" />
+        <Text text="这一轮只检查键盘焦点和激活，不混入上层业务面板。" />
+      </Column>
+    </Card>
+
+    <Card title="Keyboard Focus" subtitle="tab focus active" height="214">
+      <Column gap="12">
+        <Text text="只检查下面三个可聚焦按钮和右下角状态叠层。" />
+        <Row gap="12">
+          <Button id="focus-first" text="First Focus" />
+          <Button id="focus-second" text="Second Focus" />
+          <Button id="focus-third" text="Third Focus" />
+        </Row>
+        <Text text="1. 按 Tab：focus 应依次切到 First / Second / Third。" />
+        <Text text="2. 按 Shift+Tab：focus 应反向切换。" />
+        <Text text="3. focus 停在任一按钮后，按 Enter 或 Space：active 应出现；松开后 active 清空。" />
+      </Column>
+    </Card>
+  </Column>
+</View>

tests/UI/Core/integration/input/keyboard_focus/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.keyboard_focus");
+}

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

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

tests/UI/Core/integration/input/pointer_states/README.md

@@ -0,0 +1,14 @@
+# Pointer States Validation
+
+可执行 target：
+- `core_ui_input_pointer_states_validation`
+
+运行：
+```bash
+build\tests\UI\Core\integration\input\pointer_states\Debug\XCUICoreInputPointerStatesValidation.exe
+```
+
+检查点：
+1. hover 左侧按钮，只应变化 `hover`。
+2. 按住中间按钮，应看到 `focus`、`active`、`capture`。
+3. 拖到右侧再松开，应看到 `capture` 清空，route 转到新的目标。

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

@@ -0,0 +1,30 @@
+<View
+  name="CoreInputPointerStates"
+  theme="../../shared/themes/core_validation.xctheme">
+  <Column padding="24" gap="16">
+    <Card
+      title="Core Validation | Pointer States"
+      subtitle="当前批次：鼠标 hover / focus / active / capture"
+      tone="accent"
+      height="90">
+      <Column gap="8">
+        <Text text="这是 Core 层验证场景，不承载 runtime 游戏 UI。" />
+        <Text text="这一轮只检查鼠标输入状态，不混入别的控件实验。" />
+      </Column>
+    </Card>
+
+    <Card title="Pointer Input" subtitle="hover focus active capture" height="196">
+      <Column gap="12">
+        <Text text="这一轮只需要检查下面这三个按钮。" />
+        <Row gap="12">
+          <Button id="input-hover" text="Hover / Focus" />
+          <Button id="input-capture" text="Pointer Capture" capturePointer="true" />
+          <Button id="input-route" text="Route Target" />
+        </Row>
+        <Text text="1. 鼠标移到左侧按钮：hover 应变化，focus 保持空。" />
+        <Text text="2. 按住中间按钮：focus、active、capture 都应留在中间。" />
+        <Text text="3. 拖到右侧再松开：hover 移到右侧，capture 清空，focus 仍留中间。" />
+      </Column>
+    </Card>
+  </Column>
+</View>

tests/UI/Core/integration/input/pointer_states/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.pointer_states");
+}

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

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

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

@@ -0,0 +1,61 @@
+<View
+  name="CoreInputScrollView"
+  theme="../../shared/themes/core_validation.xctheme">
+  <Column padding="20" gap="12">
+    <Card
+      title="功能：ScrollView 滚动 / clip / overflow"
+      subtitle="只检查滚轮滚动、裁剪、overflow 与 target 路由，不检查业务面板"
+      tone="accent"
+      height="118">
+      <Column gap="6">
+        <Text text="1. 把鼠标放到下方日志区内滚动滚轮：内容应上下移动，右下角 Scroll target 应落到 validation-scroll。" />
+        <Text text="2. 连续向下滚到末尾再继续滚：Offset 应被 clamp，Result 应显示 Scroll delta clamped to current offset。" />
+        <Text text="3. 把鼠标移到日志区外再滚动：日志位置不应变化，Result 应显示 No hovered ScrollView。" />
+        <Text text="4. 这个场景只验证 ScrollView 基础能力，不验证上层业务面板。" />
+      </Column>
+    </Card>
+
+    <Card
+      title="Scrollable Log"
+      subtitle="wheel inside this viewport"
+      height="fill">
+      <ScrollView id="validation-scroll" height="fill">
+        <Column gap="8">
+          <Text text="Line 01 - Scroll validation log" />
+          <Text text="Line 02 - Scroll validation log" />
+          <Text text="Line 03 - Scroll validation log" />
+          <Text text="Line 04 - Scroll validation log" />
+          <Text text="Line 05 - Scroll validation log" />
+          <Text text="Line 06 - Scroll validation log" />
+          <Text text="Line 07 - Scroll validation log" />
+          <Text text="Line 08 - Scroll validation log" />
+          <Text text="Line 09 - Scroll validation log" />
+          <Text text="Line 10 - Scroll validation log" />
+          <Text text="Line 11 - Scroll validation log" />
+          <Text text="Line 12 - Scroll validation log" />
+          <Text text="Line 13 - Scroll validation log" />
+          <Text text="Line 14 - Scroll validation log" />
+          <Text text="Line 15 - Scroll validation log" />
+          <Text text="Line 16 - Scroll validation log" />
+          <Text text="Line 17 - Scroll validation log" />
+          <Text text="Line 18 - Scroll validation log" />
+          <Text text="Line 19 - Scroll validation log" />
+          <Text text="Line 20 - Scroll validation log" />
+          <Text text="Line 21 - Scroll validation log" />
+          <Text text="Line 22 - Scroll validation log" />
+          <Text text="Line 23 - Scroll validation log" />
+          <Text text="Line 24 - Scroll validation log" />
+        </Column>
+      </ScrollView>
+    </Card>
+
+    <Card
+      title="Outside Area"
+      subtitle="wheel here should not move the log"
+      height="84">
+      <Column gap="8">
+        <Text text="把鼠标移到这个区域再滚动，用来检查 No hovered ScrollView。" />
+      </Column>
+    </Card>
+  </Column>
+</View>

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

@@ -0,0 +1 @@
+

tests/UI/Core/integration/input/scroll_view/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.scroll_view");
+}

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

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

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

@@ -0,0 +1,69 @@
+<View
+  name="CoreInputShortcutScope"
+  theme="../../shared/themes/core_validation.xctheme"
+  shortcut="Ctrl+P"
+  shortcutCommand="global.command"
+  shortcutScope="global">
+  <Column padding="20" gap="12">
+    <Card
+      title="Core Validation | Shortcut Scope"
+      subtitle="验证功能：Core shortcut scope 路由与 text input suppression"
+      tone="accent"
+      height="100">
+      <Column gap="6">
+        <Text text="功能 1：验证 Ctrl+P 在 Widget / Panel / Window / Global 间按优先级命中 shortcut。" />
+        <Text text="功能 2：验证 Text Input Proxy 会抑制 Ctrl+P 和 Tab 焦点遍历。" />
+      </Column>
+    </Card>
+
+    <Button id="global-focus" text="Global Focus" />
+
+    <Card
+      id="window-shell"
+      title="Window Scope"
+      subtitle="Ctrl+P -> window.command"
+      shortcutScopeRoot="window"
+      shortcut="Ctrl+P"
+      shortcutCommand="window.command"
+      shortcutScope="window">
+      <Column gap="10">
+        <Text text="先检查优先级：widget > panel > window > global。" />
+        <Button id="window-focus" text="Window Focus" />
+
+        <Card
+          id="panel-shell"
+          title="Panel Scope"
+          subtitle="Ctrl+P -> panel.command"
+          shortcutScopeRoot="panel"
+          shortcut="Ctrl+P"
+          shortcutCommand="panel.command"
+          shortcutScope="panel">
+          <Column gap="10">
+            <Button id="panel-focus" text="Panel Focus" />
+
+            <Card
+              id="widget-shell"
+              title="Widget Scope"
+              subtitle="Ctrl+P -> widget.command"
+              tone="accent-alt"
+              shortcutScopeRoot="widget"
+              shortcut="Ctrl+P"
+              shortcutCommand="widget.command"
+              shortcutScope="widget">
+              <Column gap="10">
+                <Button id="widget-focus" text="Widget Focus" />
+              </Column>
+            </Card>
+
+            <Button id="text-input" text="Text Input Proxy" textInput="true" />
+            <Text text="操作指引：" />
+            <Text text="1. 依次点 Widget / Panel / Window / Global Focus，再按 Ctrl+P。" />
+            <Text text="2. 右下角 Recent shortcut 应分别显示 widget / panel / window / global，且状态为 handled。" />
+            <Text text="3. 点 Text Input Proxy 再按 Ctrl+P，Recent shortcut 状态应变为 suppressed。" />
+            <Text text="4. 保持 Text Input Proxy focus 再按 Tab，Result 应显示 focus traversal suppressed，focus 不应跳走。" />
+          </Column>
+        </Card>
+      </Column>
+    </Card>
+  </Column>
+</View>

tests/UI/Core/integration/input/shortcut_scope/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.shortcut_scope");
+}

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

@@ -0,0 +1,10 @@
+add_subdirectory(splitter_resize)
+add_subdirectory(tab_strip_selection)
+add_subdirectory(workspace_compose)
+
+add_custom_target(core_ui_layout_integration_tests
+    DEPENDS
+        core_ui_layout_splitter_resize_validation
+        core_ui_layout_tab_strip_selection_validation
+        core_ui_layout_workspace_compose_validation
+)

tests/UI/Core/integration/layout/splitter_resize/CMakeLists.txt

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

tests/UI/Core/integration/layout/splitter_resize/View.xcui

@@ -0,0 +1,39 @@
+<View
+  name="CoreSplitterResizeValidation"
+  theme="../../shared/themes/core_validation.xctheme">
+  <Column width="fill" height="fill" padding="20" gap="12">
+    <Card
+      title="功能：Splitter / pane resize"
+      subtitle="这一轮只检查分割条拖拽和最小尺寸 clamp"
+      tone="accent"
+      height="128">
+      <Column gap="6">
+        <Text text="1. 鼠标移到中间 divider：右下角 Hover 应落到 workspace-splitter。" />
+        <Text text="2. 按住左键拖拽：左右 pane 宽度应实时变化，Result 应出现 Splitter drag started / Splitter resized。" />
+        <Text text="3. 向左右极限拖拽：布局应被 primaryMin / secondaryMin clamp 住，不应穿透。" />
+        <Text text="4. 松开左键：Result 应显示 Splitter drag finished。" />
+      </Column>
+    </Card>
+
+    <Splitter
+      id="workspace-splitter"
+      axis="horizontal"
+      splitRatio="0.38"
+      splitterSize="10"
+      splitterHitSize="18"
+      primaryMin="180"
+      secondaryMin="220"
+      height="fill">
+      <Card id="left-pane" title="Left Empty Pane" subtitle="min 180" height="fill">
+        <Column gap="8">
+          <Text text="这里只保留空 pane，用来观察 resize。" />
+        </Column>
+      </Card>
+      <Card id="right-pane" title="Right Empty Pane" subtitle="min 220" height="fill">
+        <Column gap="8">
+          <Text text="拖拽过程中不应出现翻转、穿透或抖动。" />
+        </Column>
+      </Card>
+    </Splitter>
+  </Column>
+</View>

tests/UI/Core/integration/layout/splitter_resize/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.layout.splitter_resize");
+}

tests/UI/Core/integration/layout/tab_strip_selection/CMakeLists.txt

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

tests/UI/Core/integration/layout/tab_strip_selection/View.xcui

@@ -0,0 +1,46 @@
+<View
+  name="CoreTabStripSelectionValidation"
+  theme="../../shared/themes/core_validation.xctheme">
+  <Column width="fill" height="fill" padding="20" gap="12">
+    <Card
+      title="功能：TabStrip 选择切换"
+      subtitle="只验证 tab 头部点击、键盘导航，以及只渲染 selected tab 内容"
+      tone="accent"
+      height="156">
+      <Column gap="6">
+        <Text text="1. 点击 Scene / Console / Inspector 任一 tab：下方内容区应立即切换，旧内容不应继续显示。" />
+        <Text text="2. 先点击一个 tab 让它获得 focus，再按 Left / Right / Home / End：selected tab 应变化。" />
+        <Text text="3. 右下角 Result 正常应显示 Tab selected 或 Tab navigated；Focused 应落在当前 tab。" />
+        <Text text="4. 这个场景只检查 TabStrip 基础能力，不检查上层业务面板。" />
+      </Column>
+    </Card>
+
+    <TabStrip
+      id="core-workspace-tabs"
+      tabHeaderHeight="34"
+      tabMinWidth="96"
+      height="fill">
+      <Tab id="tab-scene" label="Scene" selected="true">
+        <Card title="Scene Tab Content" subtitle="selected = Scene" height="fill">
+          <Column gap="8">
+            <Text text="这里应该只显示 Scene 的内容占位。" />
+          </Column>
+        </Card>
+      </Tab>
+      <Tab id="tab-console" label="Console">
+        <Card title="Console Tab Content" subtitle="selected = Console" height="fill">
+          <Column gap="8">
+            <Text text="切换到 Console 后，Scene 内容应消失。" />
+          </Column>
+        </Card>
+      </Tab>
+      <Tab id="tab-inspector" label="Inspector">
+        <Card title="Inspector Tab Content" subtitle="selected = Inspector" height="fill">
+          <Column gap="8">
+            <Text text="按 Home / End 时，也应只保留当前 selected 内容。" />
+          </Column>
+        </Card>
+      </Tab>
+    </TabStrip>
+  </Column>
+</View>

tests/UI/Core/integration/layout/tab_strip_selection/captures/.gitkeep

@@ -0,0 +1 @@
+

tests/UI/Core/integration/layout/tab_strip_selection/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.layout.tab_strip_selection");
+}

tests/UI/Core/integration/layout/workspace_compose/CMakeLists.txt

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

tests/UI/Core/integration/layout/workspace_compose/View.xcui

@@ -0,0 +1,94 @@
+<View
+  name="CoreWorkspaceComposeValidation"
+  theme="../../shared/themes/core_validation.xctheme">
+  <Column width="fill" height="fill" padding="20" gap="12">
+    <Card
+      title="功能：Workspace compose"
+      subtitle="只检查共享工作区组合原语的 split + tab + placeholder，不检查任何业务面板"
+      tone="accent"
+      height="156">
+      <Column gap="6">
+        <Text text="1. 先看布局：左、中、右、下四个区域应边界清晰，没有重叠、穿透或错位。" />
+        <Text text="2. 拖拽 workspace-left-right 和 workspace-top-bottom：各区域尺寸应实时变化，并被最小尺寸 clamp 住。" />
+        <Text text="3. 点击中间的 Document A / B / C：只应显示当前 selected tab 的 placeholder 内容。" />
+        <Text text="4. 这个场景只验证工作区组合基础，不代表 Hierarchy / Inspector / Console 已开始实现。" />
+      </Column>
+    </Card>
+
+    <Splitter
+      id="workspace-top-bottom"
+      axis="vertical"
+      splitRatio="0.76"
+      splitterSize="10"
+      splitterHitSize="18"
+      primaryMin="320"
+      secondaryMin="120"
+      height="fill">
+      <Splitter
+        id="workspace-left-right"
+        axis="horizontal"
+        splitRatio="0.24"
+        splitterSize="10"
+        splitterHitSize="18"
+        primaryMin="160"
+        secondaryMin="420"
+        height="fill">
+        <Card id="workspace-left-slot" title="Navigation Slot" subtitle="placeholder panel host" height="fill">
+          <Column gap="8">
+            <Text text="这里是左侧 placeholder slot，只检查 pane compose。" />
+          </Column>
+        </Card>
+
+        <Splitter
+          id="workspace-center-right"
+          axis="horizontal"
+          splitRatio="0.70"
+          splitterSize="10"
+          splitterHitSize="18"
+          primaryMin="260"
+          secondaryMin="180"
+          height="fill">
+          <TabStrip
+            id="workspace-document-tabs"
+            tabHeaderHeight="34"
+            tabMinWidth="112"
+            height="fill">
+            <Tab id="tab-document-a" label="Document A" selected="true">
+              <Card title="Primary Document Slot" subtitle="selected = Document A" height="fill">
+                <Column gap="8">
+                  <Text text="这里应只显示 Document A 的 placeholder 内容。" />
+                </Column>
+              </Card>
+            </Tab>
+            <Tab id="tab-document-b" label="Document B">
+              <Card title="Secondary Document Slot" subtitle="selected = Document B" height="fill">
+                <Column gap="8">
+                  <Text text="切换到 Document B 后，A 的内容应消失。" />
+                </Column>
+              </Card>
+            </Tab>
+            <Tab id="tab-document-c" label="Document C">
+              <Card title="Tertiary Document Slot" subtitle="selected = Document C" height="fill">
+                <Column gap="8">
+                  <Text text="这里只是第三个 placeholder，不代表真实面板业务。" />
+                </Column>
+              </Card>
+            </Tab>
+          </TabStrip>
+
+          <Card id="workspace-right-slot" title="Details Slot" subtitle="placeholder panel host" height="fill">
+            <Column gap="8">
+              <Text text="这里是右侧 placeholder slot，只检查嵌套 split 稳定性。" />
+            </Column>
+          </Card>
+        </Splitter>
+      </Splitter>
+
+      <Card id="workspace-bottom-slot" title="Output Slot" subtitle="placeholder panel host" height="fill">
+        <Column gap="8">
+          <Text text="这里是底部 placeholder slot，用来检查上下 split compose。" />
+        </Column>
+      </Card>
+    </Splitter>
+  </Column>
+</View>

tests/UI/Core/integration/layout/workspace_compose/captures/.gitkeep

@@ -0,0 +1 @@
+

tests/UI/Core/integration/layout/workspace_compose/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.layout.workspace_compose");
+}

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

@@ -0,0 +1,61 @@
+file(TO_CMAKE_PATH "${CMAKE_SOURCE_DIR}" XCENGINE_CORE_UI_TESTS_REPO_ROOT_PATH)
+
+add_library(core_ui_validation_registry STATIC
+    src/CoreValidationScenario.cpp
+)
+
+target_include_directories(core_ui_validation_registry
+    PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}/src
+        ${CMAKE_SOURCE_DIR}/engine/include
+)
+
+target_compile_definitions(core_ui_validation_registry
+    PUBLIC
+        XCENGINE_CORE_UI_TESTS_REPO_ROOT="${XCENGINE_CORE_UI_TESTS_REPO_ROOT_PATH}"
+)
+
+if(MSVC)
+    target_compile_options(core_ui_validation_registry PRIVATE /utf-8 /FS)
+    set_property(TARGET core_ui_validation_registry PROPERTY
+        MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL")
+endif()
+
+target_link_libraries(core_ui_validation_registry
+    PUBLIC
+        XCEngine
+)
+
+add_library(core_ui_integration_host STATIC
+    src/AutoScreenshot.cpp
+    src/Application.cpp
+    src/NativeRenderer.cpp
+)
+
+target_include_directories(core_ui_integration_host
+    PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}/src
+        ${CMAKE_SOURCE_DIR}/engine/include
+)
+
+target_compile_definitions(core_ui_integration_host
+    PUBLIC
+        UNICODE
+        _UNICODE
+        XCENGINE_CORE_UI_TESTS_REPO_ROOT="${XCENGINE_CORE_UI_TESTS_REPO_ROOT_PATH}"
+)
+
+if(MSVC)
+    target_compile_options(core_ui_integration_host PRIVATE /utf-8 /FS)
+    set_property(TARGET core_ui_integration_host PROPERTY
+        MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL")
+endif()
+
+target_link_libraries(core_ui_integration_host
+    PUBLIC
+        core_ui_validation_registry
+        XCEngine
+        d2d1.lib
+        dwrite.lib
+        windowscodecs.lib
+)

tests/UI/Core/integration/shared/src/Application.cpp

@@ -0,0 +1,802 @@
+#include "Application.h"
+
+#include <XCEngine/Input/InputTypes.h>
+
+#include <algorithm>
+#include <chrono>
+#include <filesystem>
+#include <sstream>
+#include <string>
+#include <system_error>
+#include <unordered_set>
+#include <vector>
+
+#ifndef XCENGINE_CORE_UI_TESTS_REPO_ROOT
+#define XCENGINE_CORE_UI_TESTS_REPO_ROOT "."
+#endif
+
+namespace XCEngine::Tests::CoreUI {
+
+namespace {
+
+using ::XCEngine::UI::UIColor;
+using ::XCEngine::UI::UIDrawData;
+using ::XCEngine::UI::UIDrawList;
+using ::XCEngine::UI::UIInputEvent;
+using ::XCEngine::UI::UIInputEventType;
+using ::XCEngine::UI::UIPoint;
+using ::XCEngine::UI::UIPointerButton;
+using ::XCEngine::UI::UIRect;
+using ::XCEngine::UI::Runtime::UIScreenFrameInput;
+using ::XCEngine::Input::KeyCode;
+
+constexpr const wchar_t* kWindowClassName = L"XCUICoreValidationHost";
+constexpr const wchar_t* kWindowTitle = L"XCUI Core Validation";
+constexpr auto kReloadPollInterval = std::chrono::milliseconds(150);
+
+constexpr UIColor kOverlayBgColor(0.10f, 0.10f, 0.10f, 0.95f);
+constexpr UIColor kOverlayBorderColor(0.25f, 0.25f, 0.25f, 1.0f);
+constexpr UIColor kOverlayTextPrimary(0.93f, 0.93f, 0.93f, 1.0f);
+constexpr UIColor kOverlayTextMuted(0.70f, 0.70f, 0.70f, 1.0f);
+constexpr UIColor kOverlaySuccess(0.82f, 0.82f, 0.82f, 1.0f);
+constexpr UIColor kOverlayFallback(0.56f, 0.56f, 0.56f, 1.0f);
+
+Application* GetApplicationFromWindow(HWND hwnd) {
+    return reinterpret_cast<Application*>(GetWindowLongPtrW(hwnd, GWLP_USERDATA));
+}
+
+std::filesystem::path GetRepoRootPath() {
+    std::string root = XCENGINE_CORE_UI_TESTS_REPO_ROOT;
+    if (root.size() >= 2u && root.front() == '"' && root.back() == '"') {
+        root = root.substr(1u, root.size() - 2u);
+    }
+    return std::filesystem::path(root).lexically_normal();
+}
+
+std::string TruncateText(const std::string& text, std::size_t maxLength) {
+    if (text.size() <= maxLength) {
+        return text;
+    }
+
+    if (maxLength <= 3u) {
+        return text.substr(0, maxLength);
+    }
+
+    return text.substr(0, maxLength - 3u) + "...";
+}
+
+std::string ExtractStateKeyTail(const std::string& stateKey) {
+    if (stateKey.empty()) {
+        return "-";
+    }
+
+    const std::size_t separator = stateKey.find_last_of('/');
+    if (separator == std::string::npos || separator + 1u >= stateKey.size()) {
+        return stateKey;
+    }
+
+    return stateKey.substr(separator + 1u);
+}
+
+std::string FormatFloat(float value) {
+    std::ostringstream stream;
+    stream.setf(std::ios::fixed, std::ios::floatfield);
+    stream.precision(1);
+    stream << value;
+    return stream.str();
+}
+
+std::string FormatPoint(const UIPoint& point) {
+    return "(" + FormatFloat(point.x) + ", " + FormatFloat(point.y) + ")";
+}
+
+std::string FormatRect(const UIRect& rect) {
+    return "(" + FormatFloat(rect.x) +
+        ", " + FormatFloat(rect.y) +
+        ", " + FormatFloat(rect.width) +
+        ", " + FormatFloat(rect.height) +
+        ")";
+}
+
+std::int32_t MapVirtualKeyToUIKeyCode(WPARAM wParam) {
+    switch (wParam) {
+    case 'A': return static_cast<std::int32_t>(KeyCode::A);
+    case 'B': return static_cast<std::int32_t>(KeyCode::B);
+    case 'C': return static_cast<std::int32_t>(KeyCode::C);
+    case 'D': return static_cast<std::int32_t>(KeyCode::D);
+    case 'E': return static_cast<std::int32_t>(KeyCode::E);
+    case 'F': return static_cast<std::int32_t>(KeyCode::F);
+    case 'G': return static_cast<std::int32_t>(KeyCode::G);
+    case 'H': return static_cast<std::int32_t>(KeyCode::H);
+    case 'I': return static_cast<std::int32_t>(KeyCode::I);
+    case 'J': return static_cast<std::int32_t>(KeyCode::J);
+    case 'K': return static_cast<std::int32_t>(KeyCode::K);
+    case 'L': return static_cast<std::int32_t>(KeyCode::L);
+    case 'M': return static_cast<std::int32_t>(KeyCode::M);
+    case 'N': return static_cast<std::int32_t>(KeyCode::N);
+    case 'O': return static_cast<std::int32_t>(KeyCode::O);
+    case 'P': return static_cast<std::int32_t>(KeyCode::P);
+    case 'Q': return static_cast<std::int32_t>(KeyCode::Q);
+    case 'R': return static_cast<std::int32_t>(KeyCode::R);
+    case 'S': return static_cast<std::int32_t>(KeyCode::S);
+    case 'T': return static_cast<std::int32_t>(KeyCode::T);
+    case 'U': return static_cast<std::int32_t>(KeyCode::U);
+    case 'V': return static_cast<std::int32_t>(KeyCode::V);
+    case 'W': return static_cast<std::int32_t>(KeyCode::W);
+    case 'X': return static_cast<std::int32_t>(KeyCode::X);
+    case 'Y': return static_cast<std::int32_t>(KeyCode::Y);
+    case 'Z': return static_cast<std::int32_t>(KeyCode::Z);
+    case '0': return static_cast<std::int32_t>(KeyCode::Zero);
+    case '1': return static_cast<std::int32_t>(KeyCode::One);
+    case '2': return static_cast<std::int32_t>(KeyCode::Two);
+    case '3': return static_cast<std::int32_t>(KeyCode::Three);
+    case '4': return static_cast<std::int32_t>(KeyCode::Four);
+    case '5': return static_cast<std::int32_t>(KeyCode::Five);
+    case '6': return static_cast<std::int32_t>(KeyCode::Six);
+    case '7': return static_cast<std::int32_t>(KeyCode::Seven);
+    case '8': return static_cast<std::int32_t>(KeyCode::Eight);
+    case '9': return static_cast<std::int32_t>(KeyCode::Nine);
+    case VK_SPACE: return static_cast<std::int32_t>(KeyCode::Space);
+    case VK_TAB: return static_cast<std::int32_t>(KeyCode::Tab);
+    case VK_RETURN: return static_cast<std::int32_t>(KeyCode::Enter);
+    case VK_ESCAPE: return static_cast<std::int32_t>(KeyCode::Escape);
+    case VK_SHIFT: return static_cast<std::int32_t>(KeyCode::LeftShift);
+    case VK_CONTROL: return static_cast<std::int32_t>(KeyCode::LeftCtrl);
+    case VK_MENU: return static_cast<std::int32_t>(KeyCode::LeftAlt);
+    case VK_UP: return static_cast<std::int32_t>(KeyCode::Up);
+    case VK_DOWN: return static_cast<std::int32_t>(KeyCode::Down);
+    case VK_LEFT: return static_cast<std::int32_t>(KeyCode::Left);
+    case VK_RIGHT: return static_cast<std::int32_t>(KeyCode::Right);
+    case VK_HOME: return static_cast<std::int32_t>(KeyCode::Home);
+    case VK_END: return static_cast<std::int32_t>(KeyCode::End);
+    case VK_PRIOR: return static_cast<std::int32_t>(KeyCode::PageUp);
+    case VK_NEXT: return static_cast<std::int32_t>(KeyCode::PageDown);
+    case VK_DELETE: return static_cast<std::int32_t>(KeyCode::Delete);
+    case VK_BACK: return static_cast<std::int32_t>(KeyCode::Backspace);
+    case VK_F1: return static_cast<std::int32_t>(KeyCode::F1);
+    case VK_F2: return static_cast<std::int32_t>(KeyCode::F2);
+    case VK_F3: return static_cast<std::int32_t>(KeyCode::F3);
+    case VK_F4: return static_cast<std::int32_t>(KeyCode::F4);
+    case VK_F5: return static_cast<std::int32_t>(KeyCode::F5);
+    case VK_F6: return static_cast<std::int32_t>(KeyCode::F6);
+    case VK_F7: return static_cast<std::int32_t>(KeyCode::F7);
+    case VK_F8: return static_cast<std::int32_t>(KeyCode::F8);
+    case VK_F9: return static_cast<std::int32_t>(KeyCode::F9);
+    case VK_F10: return static_cast<std::int32_t>(KeyCode::F10);
+    case VK_F11: return static_cast<std::int32_t>(KeyCode::F11);
+    case VK_F12: return static_cast<std::int32_t>(KeyCode::F12);
+    default: return static_cast<std::int32_t>(KeyCode::None);
+    }
+}
+
+bool IsRepeatKeyMessage(LPARAM lParam) {
+    return (static_cast<unsigned long>(lParam) & (1ul << 30)) != 0ul;
+}
+
+} // namespace
+
+Application::Application(std::string requestedScenarioId)
+    : m_screenPlayer(m_documentHost)
+    , m_requestedScenarioId(std::move(requestedScenarioId)) {
+}
+
+int Application::Run(HINSTANCE hInstance, int nCmdShow) {
+    if (!Initialize(hInstance, nCmdShow)) {
+        Shutdown();
+        return 1;
+    }
+
+    MSG message = {};
+    while (message.message != WM_QUIT) {
+        if (PeekMessageW(&message, nullptr, 0U, 0U, PM_REMOVE)) {
+            TranslateMessage(&message);
+            DispatchMessageW(&message);
+            continue;
+        }
+
+        RenderFrame();
+        Sleep(8);
+    }
+
+    Shutdown();
+    return static_cast<int>(message.wParam);
+}
+
+bool Application::Initialize(HINSTANCE hInstance, int nCmdShow) {
+    m_hInstance = hInstance;
+
+    WNDCLASSEXW windowClass = {};
+    windowClass.cbSize = sizeof(windowClass);
+    windowClass.style = CS_HREDRAW | CS_VREDRAW;
+    windowClass.lpfnWndProc = &Application::WndProc;
+    windowClass.hInstance = hInstance;
+    windowClass.hCursor = LoadCursorW(nullptr, IDC_ARROW);
+    windowClass.lpszClassName = kWindowClassName;
+
+    m_windowClassAtom = RegisterClassExW(&windowClass);
+    if (m_windowClassAtom == 0) {
+        return false;
+    }
+
+    m_hwnd = CreateWindowExW(
+        0,
+        kWindowClassName,
+        kWindowTitle,
+        WS_OVERLAPPEDWINDOW | WS_VISIBLE,
+        CW_USEDEFAULT,
+        CW_USEDEFAULT,
+        1440,
+        900,
+        nullptr,
+        nullptr,
+        hInstance,
+        this);
+    if (m_hwnd == nullptr) {
+        return false;
+    }
+
+    ShowWindow(m_hwnd, nCmdShow);
+    UpdateWindow(m_hwnd);
+
+    if (!m_renderer.Initialize(m_hwnd)) {
+        return false;
+    }
+
+    m_startTime = std::chrono::steady_clock::now();
+    m_lastFrameTime = m_startTime;
+    const CoreValidationScenario* initialScenario = m_requestedScenarioId.empty()
+        ? &GetDefaultCoreValidationScenario()
+        : FindCoreValidationScenario(m_requestedScenarioId);
+    if (initialScenario == nullptr) {
+        initialScenario = &GetDefaultCoreValidationScenario();
+    }
+    m_autoScreenshot.Initialize(initialScenario->captureRootPath);
+    LoadStructuredScreen("startup");
+    return true;
+}
+
+void Application::Shutdown() {
+    m_autoScreenshot.Shutdown();
+    m_screenPlayer.Unload();
+    m_trackedFiles.clear();
+    m_screenAsset = {};
+    m_useStructuredScreen = false;
+    m_runtimeStatus.clear();
+    m_runtimeError.clear();
+    m_frameIndex = 0;
+
+    m_renderer.Shutdown();
+
+    if (m_hwnd != nullptr && IsWindow(m_hwnd)) {
+        DestroyWindow(m_hwnd);
+    }
+    m_hwnd = nullptr;
+
+    if (m_windowClassAtom != 0 && m_hInstance != nullptr) {
+        UnregisterClassW(kWindowClassName, m_hInstance);
+        m_windowClassAtom = 0;
+    }
+}
+
+void Application::RenderFrame() {
+    if (m_hwnd == nullptr) {
+        return;
+    }
+
+    RECT clientRect = {};
+    GetClientRect(m_hwnd, &clientRect);
+    const float width = static_cast<float>((std::max)(clientRect.right - clientRect.left, 1L));
+    const float height = static_cast<float>((std::max)(clientRect.bottom - clientRect.top, 1L));
+
+    const auto now = std::chrono::steady_clock::now();
+    double deltaTimeSeconds = std::chrono::duration<double>(now - m_lastFrameTime).count();
+    if (deltaTimeSeconds <= 0.0) {
+        deltaTimeSeconds = 1.0 / 60.0;
+    }
+    m_lastFrameTime = now;
+
+    RefreshStructuredScreen();
+    std::vector<UIInputEvent> frameEvents = std::move(m_pendingInputEvents);
+    m_pendingInputEvents.clear();
+
+    UIDrawData drawData = {};
+    if (m_useStructuredScreen && m_screenPlayer.IsLoaded()) {
+        UIScreenFrameInput input = {};
+        input.viewportRect = UIRect(0.0f, 0.0f, width, height);
+        input.events = std::move(frameEvents);
+        input.deltaTimeSeconds = deltaTimeSeconds;
+        input.frameIndex = ++m_frameIndex;
+        input.focused = GetForegroundWindow() == m_hwnd;
+
+        const auto& frame = m_screenPlayer.Update(input);
+        for (const auto& drawList : frame.drawData.GetDrawLists()) {
+            drawData.AddDrawList(drawList);
+        }
+
+        m_runtimeStatus = m_activeScenario != nullptr
+            ? m_activeScenario->displayName
+            : "Core UI Validation";
+        m_runtimeError = frame.errorMessage;
+    }
+
+    if (drawData.Empty()) {
+        m_runtimeStatus = "Core UI Validation | Load Error";
+        if (m_runtimeError.empty() && !m_screenPlayer.IsLoaded()) {
+            m_runtimeError = m_screenPlayer.GetLastError();
+        }
+    }
+
+    AppendRuntimeOverlay(drawData, width, height);
+
+    const bool framePresented = m_renderer.Render(drawData);
+    m_autoScreenshot.CaptureIfRequested(
+        m_renderer,
+        drawData,
+        static_cast<unsigned int>(width),
+        static_cast<unsigned int>(height),
+        framePresented);
+}
+
+void Application::OnResize(UINT width, UINT height) {
+    if (width == 0 || height == 0) {
+        return;
+    }
+
+    m_renderer.Resize(width, height);
+}
+
+void Application::QueuePointerEvent(UIInputEventType type, UIPointerButton button, WPARAM wParam, LPARAM lParam) {
+    UIInputEvent event = {};
+    event.type = type;
+    event.pointerButton = button;
+    event.position = UIPoint(
+        static_cast<float>(GET_X_LPARAM(lParam)),
+        static_cast<float>(GET_Y_LPARAM(lParam)));
+    event.modifiers = m_inputModifierTracker.BuildPointerModifiers(static_cast<size_t>(wParam));
+    m_pendingInputEvents.push_back(event);
+}
+
+void Application::QueuePointerLeaveEvent() {
+    UIInputEvent event = {};
+    event.type = UIInputEventType::PointerLeave;
+    if (m_hwnd != nullptr) {
+        POINT clientPoint = {};
+        GetCursorPos(&clientPoint);
+        ScreenToClient(m_hwnd, &clientPoint);
+        event.position = UIPoint(static_cast<float>(clientPoint.x), static_cast<float>(clientPoint.y));
+    }
+    m_pendingInputEvents.push_back(event);
+}
+
+void Application::QueuePointerWheelEvent(short wheelDelta, WPARAM wParam, LPARAM lParam) {
+    if (m_hwnd == nullptr) {
+        return;
+    }
+
+    POINT screenPoint = {
+        GET_X_LPARAM(lParam),
+        GET_Y_LPARAM(lParam)
+    };
+    ScreenToClient(m_hwnd, &screenPoint);
+
+    UIInputEvent event = {};
+    event.type = UIInputEventType::PointerWheel;
+    event.position = UIPoint(static_cast<float>(screenPoint.x), static_cast<float>(screenPoint.y));
+    event.wheelDelta = static_cast<float>(wheelDelta);
+    event.modifiers = m_inputModifierTracker.BuildPointerModifiers(static_cast<size_t>(wParam));
+    m_pendingInputEvents.push_back(event);
+}
+
+void Application::QueueKeyEvent(UIInputEventType type, WPARAM wParam, LPARAM lParam) {
+    UIInputEvent event = {};
+    event.type = type;
+    event.keyCode = MapVirtualKeyToUIKeyCode(wParam);
+    event.modifiers = m_inputModifierTracker.ApplyKeyMessage(type, wParam, lParam);
+    event.repeat = IsRepeatKeyMessage(lParam);
+    m_pendingInputEvents.push_back(event);
+}
+
+void Application::QueueCharacterEvent(WPARAM wParam, LPARAM) {
+    UIInputEvent event = {};
+    event.type = UIInputEventType::Character;
+    event.character = static_cast<std::uint32_t>(wParam);
+    event.modifiers = m_inputModifierTracker.GetCurrentModifiers();
+    m_pendingInputEvents.push_back(event);
+}
+
+void Application::QueueWindowFocusEvent(UIInputEventType type) {
+    UIInputEvent event = {};
+    event.type = type;
+    m_pendingInputEvents.push_back(event);
+}
+
+bool Application::LoadStructuredScreen(const char* triggerReason) {
+    (void)triggerReason;
+    std::string scenarioLoadWarning = {};
+    const CoreValidationScenario* scenario = m_requestedScenarioId.empty()
+        ? &GetDefaultCoreValidationScenario()
+        : FindCoreValidationScenario(m_requestedScenarioId);
+    if (scenario == nullptr) {
+        scenario = &GetDefaultCoreValidationScenario();
+        scenarioLoadWarning = "Unknown validation scenario: " + m_requestedScenarioId;
+    }
+
+    m_activeScenario = scenario;
+    m_screenAsset = {};
+    m_screenAsset.screenId = scenario->id;
+    m_screenAsset.documentPath = scenario->documentPath.string();
+    m_screenAsset.themePath = scenario->themePath.string();
+
+    const bool loaded = m_screenPlayer.Load(m_screenAsset);
+    m_useStructuredScreen = loaded;
+    m_runtimeStatus = loaded ? scenario->displayName : "Core UI Validation | Load Error";
+    m_runtimeError = loaded
+        ? scenarioLoadWarning
+        : (scenarioLoadWarning.empty()
+            ? m_screenPlayer.GetLastError()
+            : scenarioLoadWarning + " | " + m_screenPlayer.GetLastError());
+    RebuildTrackedFileStates();
+    return loaded;
+}
+
+void Application::RefreshStructuredScreen() {
+    const auto now = std::chrono::steady_clock::now();
+    if (m_lastReloadPollTime.time_since_epoch().count() != 0 &&
+        now - m_lastReloadPollTime < kReloadPollInterval) {
+        return;
+    }
+
+    m_lastReloadPollTime = now;
+    if (DetectTrackedFileChange()) {
+        LoadStructuredScreen("reload");
+    }
+}
+
+void Application::RebuildTrackedFileStates() {
+    namespace fs = std::filesystem;
+
+    m_trackedFiles.clear();
+    std::unordered_set<std::string> seenPaths = {};
+    std::error_code errorCode = {};
+
+    auto appendTrackedPath = [&](const std::string& rawPath) {
+        if (rawPath.empty()) {
+            return;
+        }
+
+        const fs::path normalizedPath = fs::path(rawPath).lexically_normal();
+        const std::string key = normalizedPath.string();
+        if (!seenPaths.insert(key).second) {
+            return;
+        }
+
+        TrackedFileState state = {};
+        state.path = normalizedPath;
+        state.exists = fs::exists(normalizedPath, errorCode);
+        errorCode.clear();
+        if (state.exists) {
+            state.writeTime = fs::last_write_time(normalizedPath, errorCode);
+            errorCode.clear();
+        }
+        m_trackedFiles.push_back(std::move(state));
+    };
+
+    appendTrackedPath(m_screenAsset.documentPath);
+    appendTrackedPath(m_screenAsset.themePath);
+
+    if (const auto* document = m_screenPlayer.GetDocument(); document != nullptr) {
+        for (const std::string& dependency : document->dependencies) {
+            appendTrackedPath(dependency);
+        }
+    }
+}
+
+bool Application::DetectTrackedFileChange() const {
+    namespace fs = std::filesystem;
+
+    std::error_code errorCode = {};
+    for (const TrackedFileState& trackedFile : m_trackedFiles) {
+        const bool existsNow = fs::exists(trackedFile.path, errorCode);
+        errorCode.clear();
+        if (existsNow != trackedFile.exists) {
+            return true;
+        }
+
+        if (!existsNow) {
+            continue;
+        }
+
+        const auto writeTimeNow = fs::last_write_time(trackedFile.path, errorCode);
+        errorCode.clear();
+        if (writeTimeNow != trackedFile.writeTime) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+void Application::AppendRuntimeOverlay(UIDrawData& drawData, float width, float height) const {
+    const bool authoredMode = m_useStructuredScreen && m_screenPlayer.IsLoaded();
+    const float panelWidth = authoredMode ? 460.0f : 360.0f;
+    std::vector<std::string> detailLines = {};
+    detailLines.push_back(
+        authoredMode
+            ? "Hot reload watches authored UI resources."
+            : "Authored validation scene failed to load.");
+    if (m_activeScenario != nullptr) {
+        detailLines.push_back("Scenario: " + m_activeScenario->id);
+    }
+
+    if (authoredMode) {
+        const auto& inputDebug = m_documentHost.GetInputDebugSnapshot();
+        const auto& scrollDebug = m_documentHost.GetScrollDebugSnapshot();
+        detailLines.push_back(
+            "Hover | Focus: " +
+            ExtractStateKeyTail(inputDebug.hoveredStateKey) +
+            " | " +
+            ExtractStateKeyTail(inputDebug.focusedStateKey));
+        detailLines.push_back(
+            "Active | Capture: " +
+            ExtractStateKeyTail(inputDebug.activeStateKey) +
+            " | " +
+            ExtractStateKeyTail(inputDebug.captureStateKey));
+        detailLines.push_back(
+            "Scope W/P/Wg: " +
+            ExtractStateKeyTail(inputDebug.windowScopeStateKey) +
+            " | " +
+            ExtractStateKeyTail(inputDebug.panelScopeStateKey) +
+            " | " +
+            ExtractStateKeyTail(inputDebug.widgetScopeStateKey));
+        detailLines.push_back(
+            std::string("Text input: ") +
+            (inputDebug.textInputActive ? "active" : "idle"));
+        if (!inputDebug.recentShortcutCommandId.empty()) {
+            detailLines.push_back(
+                "Recent shortcut: " +
+                inputDebug.recentShortcutScope +
+                " -> " +
+                inputDebug.recentShortcutCommandId);
+            detailLines.push_back(
+                std::string("Recent shortcut state: ") +
+                (inputDebug.recentShortcutHandled
+                    ? "handled"
+                    : (inputDebug.recentShortcutSuppressed ? "suppressed" : "observed")) +
+                " @ " +
+                ExtractStateKeyTail(inputDebug.recentShortcutOwnerStateKey));
+        } else {
+            detailLines.push_back("Recent shortcut: none");
+        }
+        if (!inputDebug.lastEventType.empty()) {
+            const std::string eventPosition = inputDebug.lastEventType == "KeyDown" ||
+                    inputDebug.lastEventType == "KeyUp" ||
+                    inputDebug.lastEventType == "Character" ||
+                    inputDebug.lastEventType == "FocusGained" ||
+                    inputDebug.lastEventType == "FocusLost"
+                ? std::string()
+                : " at " + FormatPoint(inputDebug.pointerPosition);
+            detailLines.push_back(
+                "Last input: " +
+                inputDebug.lastEventType +
+                eventPosition);
+            detailLines.push_back(
+                "Route: " +
+                inputDebug.lastTargetKind +
+                " -> " +
+                ExtractStateKeyTail(inputDebug.lastTargetStateKey));
+            if (!inputDebug.lastShortcutCommandId.empty()) {
+                detailLines.push_back(
+                    "Shortcut: " +
+                    inputDebug.lastShortcutScope +
+                    " -> " +
+                    inputDebug.lastShortcutCommandId);
+                detailLines.push_back(
+                    std::string("Shortcut state: ") +
+                    (inputDebug.lastShortcutHandled
+                        ? "handled"
+                        : (inputDebug.lastShortcutSuppressed ? "suppressed" : "observed")) +
+                    " @ " +
+                    ExtractStateKeyTail(inputDebug.lastShortcutOwnerStateKey));
+            }
+            detailLines.push_back(
+                "Last event result: " +
+                (inputDebug.lastResult.empty() ? std::string("n/a") : inputDebug.lastResult));
+        }
+        detailLines.push_back(
+            "Scroll target | Primary: " +
+            ExtractStateKeyTail(scrollDebug.lastTargetStateKey) +
+            " | " +
+            ExtractStateKeyTail(scrollDebug.primaryTargetStateKey));
+        detailLines.push_back(
+            "Scroll offset B/A: " +
+            FormatFloat(scrollDebug.lastOffsetBefore) +
+            " -> " +
+            FormatFloat(scrollDebug.lastOffsetAfter) +
+            " | overflow " +
+            FormatFloat(scrollDebug.lastOverflow));
+        detailLines.push_back(
+            "Scroll H/T: " +
+            std::to_string(scrollDebug.handledWheelEventCount) +
+            "/" +
+            std::to_string(scrollDebug.totalWheelEventCount) +
+            " | " +
+            (scrollDebug.lastResult.empty() ? std::string("n/a") : scrollDebug.lastResult));
+    }
+
+    if (m_autoScreenshot.HasPendingCapture()) {
+        detailLines.push_back("Shot pending...");
+    } else if (!m_autoScreenshot.GetLastCaptureSummary().empty()) {
+        detailLines.push_back(TruncateText(m_autoScreenshot.GetLastCaptureSummary(), 78u));
+    } else {
+        detailLines.push_back("Screenshots: F12 -> current scenario captures/");
+    }
+
+    if (!m_runtimeError.empty()) {
+        detailLines.push_back(TruncateText(m_runtimeError, 78u));
+    } else if (!m_autoScreenshot.GetLastCaptureError().empty()) {
+        detailLines.push_back(TruncateText(m_autoScreenshot.GetLastCaptureError(), 78u));
+    } else if (!authoredMode) {
+        detailLines.push_back("No fallback sandbox is rendered in this host.");
+    }
+
+    const float panelHeight = 38.0f + static_cast<float>(detailLines.size()) * 18.0f;
+    const UIRect panelRect(width - panelWidth - 16.0f, height - panelHeight - 42.0f, panelWidth, panelHeight);
+
+    UIDrawList& overlay = drawData.EmplaceDrawList("Core UI Validation Overlay");
+    overlay.AddFilledRect(panelRect, kOverlayBgColor, 10.0f);
+    overlay.AddRectOutline(panelRect, kOverlayBorderColor, 1.0f, 10.0f);
+    overlay.AddFilledRect(
+        UIRect(panelRect.x + 12.0f, panelRect.y + 14.0f, 8.0f, 8.0f),
+        authoredMode ? kOverlaySuccess : kOverlayFallback,
+        4.0f);
+    overlay.AddText(
+        UIPoint(panelRect.x + 28.0f, panelRect.y + 10.0f),
+        m_runtimeStatus.empty() ? "Core UI Validation" : m_runtimeStatus,
+        kOverlayTextPrimary,
+        14.0f);
+
+    float detailY = panelRect.y + 30.0f;
+    for (std::size_t index = 0; index < detailLines.size(); ++index) {
+        const bool lastLine = index + 1u == detailLines.size();
+        overlay.AddText(
+            UIPoint(panelRect.x + 28.0f, detailY),
+            detailLines[index],
+            lastLine && (!m_runtimeError.empty() || !m_autoScreenshot.GetLastCaptureError().empty())
+                ? kOverlayFallback
+                : kOverlayTextMuted,
+            12.0f);
+        detailY += 18.0f;
+    }
+}
+
+std::filesystem::path Application::ResolveRepoRelativePath(const char* relativePath) {
+    return (GetRepoRootPath() / relativePath).lexically_normal();
+}
+
+LRESULT CALLBACK Application::WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {
+    if (message == WM_NCCREATE) {
+        const auto* createStruct = reinterpret_cast<CREATESTRUCTW*>(lParam);
+        auto* application = reinterpret_cast<Application*>(createStruct->lpCreateParams);
+        SetWindowLongPtrW(hwnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(application));
+        return TRUE;
+    }
+
+    Application* application = GetApplicationFromWindow(hwnd);
+    switch (message) {
+    case WM_SIZE:
+        if (application != nullptr && wParam != SIZE_MINIMIZED) {
+            application->OnResize(static_cast<UINT>(LOWORD(lParam)), static_cast<UINT>(HIWORD(lParam)));
+        }
+        return 0;
+    case WM_PAINT:
+        if (application != nullptr) {
+            PAINTSTRUCT paintStruct = {};
+            BeginPaint(hwnd, &paintStruct);
+            application->RenderFrame();
+            EndPaint(hwnd, &paintStruct);
+            return 0;
+        }
+        break;
+    case WM_MOUSEMOVE:
+        if (application != nullptr) {
+            if (!application->m_trackingMouseLeave) {
+                TRACKMOUSEEVENT trackMouseEvent = {};
+                trackMouseEvent.cbSize = sizeof(trackMouseEvent);
+                trackMouseEvent.dwFlags = TME_LEAVE;
+                trackMouseEvent.hwndTrack = hwnd;
+                if (TrackMouseEvent(&trackMouseEvent)) {
+                    application->m_trackingMouseLeave = true;
+                }
+            }
+            application->QueuePointerEvent(UIInputEventType::PointerMove, UIPointerButton::None, wParam, lParam);
+            return 0;
+        }
+        break;
+    case WM_MOUSELEAVE:
+        if (application != nullptr) {
+            application->m_trackingMouseLeave = false;
+            application->QueuePointerLeaveEvent();
+            return 0;
+        }
+        break;
+    case WM_LBUTTONDOWN:
+        if (application != nullptr) {
+            SetFocus(hwnd);
+            SetCapture(hwnd);
+            application->QueuePointerEvent(UIInputEventType::PointerButtonDown, UIPointerButton::Left, wParam, lParam);
+            return 0;
+        }
+        break;
+    case WM_LBUTTONUP:
+        if (application != nullptr) {
+            if (GetCapture() == hwnd) {
+                ReleaseCapture();
+            }
+            application->QueuePointerEvent(UIInputEventType::PointerButtonUp, UIPointerButton::Left, wParam, lParam);
+            return 0;
+        }
+        break;
+    case WM_MOUSEWHEEL:
+        if (application != nullptr) {
+            application->QueuePointerWheelEvent(GET_WHEEL_DELTA_WPARAM(wParam), wParam, lParam);
+            return 0;
+        }
+        break;
+    case WM_SETFOCUS:
+        if (application != nullptr) {
+            application->m_inputModifierTracker.SyncFromSystemState();
+            application->QueueWindowFocusEvent(UIInputEventType::FocusGained);
+            return 0;
+        }
+        break;
+    case WM_KILLFOCUS:
+        if (application != nullptr) {
+            application->m_inputModifierTracker.Reset();
+            application->QueueWindowFocusEvent(UIInputEventType::FocusLost);
+            return 0;
+        }
+        break;
+    case WM_KEYDOWN:
+    case WM_SYSKEYDOWN:
+        if (application != nullptr) {
+            if (wParam == VK_F12) {
+                application->m_autoScreenshot.RequestCapture("manual_f12");
+            }
+            application->QueueKeyEvent(UIInputEventType::KeyDown, wParam, lParam);
+            return 0;
+        }
+        break;
+    case WM_KEYUP:
+    case WM_SYSKEYUP:
+        if (application != nullptr) {
+            application->QueueKeyEvent(UIInputEventType::KeyUp, wParam, lParam);
+            return 0;
+        }
+        break;
+    case WM_CHAR:
+        if (application != nullptr) {
+            application->QueueCharacterEvent(wParam, lParam);
+            return 0;
+        }
+        break;
+    case WM_ERASEBKGND:
+        return 1;
+    case WM_DESTROY:
+        if (application != nullptr) {
+            application->m_hwnd = nullptr;
+        }
+        PostQuitMessage(0);
+        return 0;
+    default:
+        break;
+    }
+
+    return DefWindowProcW(hwnd, message, wParam, lParam);
+}
+
+int RunCoreUIValidationApp(HINSTANCE hInstance, int nCmdShow, std::string requestedScenarioId) {
+    Application application(std::move(requestedScenarioId));
+    return application.Run(hInstance, nCmdShow);
+}
+
+} // namespace XCEngine::Tests::CoreUI

tests/UI/Core/integration/shared/src/Application.h

@@ -0,0 +1,83 @@
+#pragma once
+
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+
+#include "AutoScreenshot.h"
+#include "CoreValidationScenario.h"
+#include "InputModifierTracker.h"
+#include "NativeRenderer.h"
+
+#include <XCEngine/UI/Runtime/UIScreenDocumentHost.h>
+#include <XCEngine/UI/Runtime/UIScreenPlayer.h>
+
+#include <windows.h>
+#include <windowsx.h>
+
+#include <chrono>
+#include <cstdint>
+#include <filesystem>
+#include <string>
+#include <vector>
+
+namespace XCEngine::Tests::CoreUI {
+
+class Application {
+public:
+    explicit Application(std::string requestedScenarioId = {});
+
+    int Run(HINSTANCE hInstance, int nCmdShow);
+
+private:
+    struct TrackedFileState {
+        std::filesystem::path path = {};
+        std::filesystem::file_time_type writeTime = {};
+        bool exists = false;
+    };
+
+    static LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
+
+    bool Initialize(HINSTANCE hInstance, int nCmdShow);
+    void Shutdown();
+    void RenderFrame();
+    void OnResize(UINT width, UINT height);
+    void QueuePointerEvent(::XCEngine::UI::UIInputEventType type, ::XCEngine::UI::UIPointerButton button, WPARAM wParam, LPARAM lParam);
+    void QueuePointerLeaveEvent();
+    void QueuePointerWheelEvent(short wheelDelta, WPARAM wParam, LPARAM lParam);
+    void QueueKeyEvent(::XCEngine::UI::UIInputEventType type, WPARAM wParam, LPARAM lParam);
+    void QueueCharacterEvent(WPARAM wParam, LPARAM lParam);
+    void QueueWindowFocusEvent(::XCEngine::UI::UIInputEventType type);
+    bool LoadStructuredScreen(const char* triggerReason);
+    void RefreshStructuredScreen();
+    void RebuildTrackedFileStates();
+    bool DetectTrackedFileChange() const;
+    void AppendRuntimeOverlay(::XCEngine::UI::UIDrawData& drawData, float width, float height) const;
+    static std::filesystem::path ResolveRepoRelativePath(const char* relativePath);
+
+    HWND m_hwnd = nullptr;
+    HINSTANCE m_hInstance = nullptr;
+    ATOM m_windowClassAtom = 0;
+    Host::NativeRenderer m_renderer;
+    Host::AutoScreenshotController m_autoScreenshot;
+    ::XCEngine::UI::Runtime::UIDocumentScreenHost m_documentHost;
+    ::XCEngine::UI::Runtime::UIScreenPlayer m_screenPlayer;
+    ::XCEngine::UI::Runtime::UIScreenAsset m_screenAsset = {};
+    const CoreValidationScenario* m_activeScenario = nullptr;
+    std::string m_requestedScenarioId = {};
+    std::vector<TrackedFileState> m_trackedFiles = {};
+    std::chrono::steady_clock::time_point m_startTime = {};
+    std::chrono::steady_clock::time_point m_lastFrameTime = {};
+    std::chrono::steady_clock::time_point m_lastReloadPollTime = {};
+    std::uint64_t m_frameIndex = 0;
+    std::vector<::XCEngine::UI::UIInputEvent> m_pendingInputEvents = {};
+    Host::InputModifierTracker m_inputModifierTracker = {};
+    bool m_trackingMouseLeave = false;
+    bool m_useStructuredScreen = false;
+    std::string m_runtimeStatus = {};
+    std::string m_runtimeError = {};
+};
+
+int RunCoreUIValidationApp(HINSTANCE hInstance, int nCmdShow, std::string requestedScenarioId = {});
+
+} // namespace XCEngine::Tests::CoreUI

tests/UI/Core/integration/shared/src/AutoScreenshot.cpp

@@ -0,0 +1,165 @@
+#include "AutoScreenshot.h"
+
+#include "NativeRenderer.h"
+
+#include <chrono>
+#include <cctype>
+#include <cstdio>
+#include <sstream>
+#include <system_error>
+
+namespace XCEngine::Tests::CoreUI::Host {
+
+void AutoScreenshotController::Initialize(const std::filesystem::path& captureRoot) {
+    m_captureRoot = captureRoot.lexically_normal();
+    m_historyRoot = (m_captureRoot / "history").lexically_normal();
+    m_latestCapturePath = (m_captureRoot / "latest.png").lexically_normal();
+    m_captureCount = 0;
+    m_capturePending = false;
+    m_pendingReason.clear();
+    m_lastCaptureSummary.clear();
+    m_lastCaptureError.clear();
+}
+
+void AutoScreenshotController::Shutdown() {
+    m_capturePending = false;
+    m_pendingReason.clear();
+}
+
+void AutoScreenshotController::RequestCapture(std::string reason) {
+    m_pendingReason = reason.empty() ? "capture" : std::move(reason);
+    m_capturePending = true;
+}
+
+void AutoScreenshotController::CaptureIfRequested(
+    NativeRenderer& renderer,
+    const ::XCEngine::UI::UIDrawData& drawData,
+    unsigned int width,
+    unsigned int height,
+    bool framePresented) {
+    if (!m_capturePending || !framePresented || drawData.Empty() || width == 0u || height == 0u) {
+        return;
+    }
+
+    std::error_code errorCode = {};
+    std::filesystem::create_directories(m_captureRoot, errorCode);
+    if (errorCode) {
+        m_lastCaptureError = "Failed to create screenshot directory: " + m_captureRoot.string();
+        m_lastCaptureSummary = "AutoShot failed";
+        m_capturePending = false;
+        return;
+    }
+
+    std::filesystem::create_directories(m_historyRoot, errorCode);
+    if (errorCode) {
+        m_lastCaptureError = "Failed to create screenshot directory: " + m_historyRoot.string();
+        m_lastCaptureSummary = "AutoShot failed";
+        m_capturePending = false;
+        return;
+    }
+
+    std::string captureError = {};
+    const std::filesystem::path historyPath = BuildHistoryCapturePath(m_pendingReason);
+    if (!renderer.CaptureToPng(drawData, width, height, historyPath, captureError)) {
+        m_lastCaptureError = std::move(captureError);
+        m_lastCaptureSummary = "AutoShot failed";
+        m_capturePending = false;
+        return;
+    }
+
+    errorCode.clear();
+    std::filesystem::copy_file(
+        historyPath,
+        m_latestCapturePath,
+        std::filesystem::copy_options::overwrite_existing,
+        errorCode);
+    if (errorCode) {
+        m_lastCaptureError = "Failed to update latest screenshot: " + m_latestCapturePath.string();
+        m_lastCaptureSummary = "AutoShot failed";
+        m_capturePending = false;
+        return;
+    }
+
+    ++m_captureCount;
+    m_lastCaptureError.clear();
+    m_lastCaptureSummary = "Shot: latest.png | " + historyPath.filename().string();
+    m_capturePending = false;
+    m_pendingReason.clear();
+}
+
+bool AutoScreenshotController::HasPendingCapture() const {
+    return m_capturePending;
+}
+
+const std::filesystem::path& AutoScreenshotController::GetLatestCapturePath() const {
+    return m_latestCapturePath;
+}
+
+const std::string& AutoScreenshotController::GetLastCaptureSummary() const {
+    return m_lastCaptureSummary;
+}
+
+const std::string& AutoScreenshotController::GetLastCaptureError() const {
+    return m_lastCaptureError;
+}
+
+std::filesystem::path AutoScreenshotController::BuildHistoryCapturePath(std::string_view reason) const {
+    std::ostringstream filename;
+    filename << BuildTimestampString()
+             << '_'
+             << (m_captureCount + 1u)
+             << '_'
+             << SanitizeReason(reason)
+             << ".png";
+    return (m_historyRoot / filename.str()).lexically_normal();
+}
+
+std::string AutoScreenshotController::BuildTimestampString() {
+    const auto now = std::chrono::system_clock::now();
+    const std::time_t currentTime = std::chrono::system_clock::to_time_t(now);
+    std::tm localTime = {};
+    localtime_s(&localTime, &currentTime);
+
+    char buffer[32] = {};
+    std::snprintf(
+        buffer,
+        sizeof(buffer),
+        "%04d%02d%02d_%02d%02d%02d",
+        localTime.tm_year + 1900,
+        localTime.tm_mon + 1,
+        localTime.tm_mday,
+        localTime.tm_hour,
+        localTime.tm_min,
+        localTime.tm_sec);
+    return buffer;
+}
+
+std::string AutoScreenshotController::SanitizeReason(std::string_view reason) {
+    std::string sanitized = {};
+    sanitized.reserve(reason.size());
+
+    bool lastWasSeparator = false;
+    for (const unsigned char value : reason) {
+        if (std::isalnum(value)) {
+            sanitized.push_back(static_cast<char>(std::tolower(value)));
+            lastWasSeparator = false;
+            continue;
+        }
+
+        if (!lastWasSeparator) {
+            sanitized.push_back('_');
+            lastWasSeparator = true;
+        }
+    }
+
+    while (!sanitized.empty() && sanitized.front() == '_') {
+        sanitized.erase(sanitized.begin());
+    }
+    while (!sanitized.empty() && sanitized.back() == '_') {
+        sanitized.pop_back();
+    }
+
+    return sanitized.empty() ? "capture" : sanitized;
+}
+
+} // namespace XCEngine::Tests::CoreUI::Host

tests/UI/Core/integration/shared/src/AutoScreenshot.h

@@ -0,0 +1,52 @@
+#pragma once
+
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+
+#include <XCEngine/UI/DrawData.h>
+
+#include <cstdint>
+#include <filesystem>
+#include <string>
+#include <string_view>
+
+namespace XCEngine::Tests::CoreUI::Host {
+
+class NativeRenderer;
+
+class AutoScreenshotController {
+public:
+    void Initialize(const std::filesystem::path& captureRoot);
+    void Shutdown();
+
+    void RequestCapture(std::string reason);
+    void CaptureIfRequested(
+        NativeRenderer& renderer,
+        const ::XCEngine::UI::UIDrawData& drawData,
+        unsigned int width,
+        unsigned int height,
+        bool framePresented);
+
+    bool HasPendingCapture() const;
+    const std::filesystem::path& GetLatestCapturePath() const;
+    const std::string& GetLastCaptureSummary() const;
+    const std::string& GetLastCaptureError() const;
+
+private:
+    std::filesystem::path BuildHistoryCapturePath(std::string_view reason) const;
+
+    static std::string BuildTimestampString();
+    static std::string SanitizeReason(std::string_view reason);
+
+    std::filesystem::path m_captureRoot = {};
+    std::filesystem::path m_historyRoot = {};
+    std::filesystem::path m_latestCapturePath = {};
+    std::string m_pendingReason = {};
+    std::string m_lastCaptureSummary = {};
+    std::string m_lastCaptureError = {};
+    std::uint64_t m_captureCount = 0;
+    bool m_capturePending = false;
+};
+
+} // namespace XCEngine::Tests::CoreUI::Host

tests/UI/Core/integration/shared/src/CoreValidationScenario.cpp

@@ -0,0 +1,130 @@
+#include "CoreValidationScenario.h"
+
+#include <array>
+
+#ifndef XCENGINE_CORE_UI_TESTS_REPO_ROOT
+#define XCENGINE_CORE_UI_TESTS_REPO_ROOT "."
+#endif
+
+namespace XCEngine::Tests::CoreUI {
+
+namespace {
+
+namespace fs = std::filesystem;
+
+fs::path RepoRootPath() {
+    std::string root = XCENGINE_CORE_UI_TESTS_REPO_ROOT;
+    if (root.size() >= 2u && root.front() == '"' && root.back() == '"') {
+        root = root.substr(1u, root.size() - 2u);
+    }
+    return fs::path(root).lexically_normal();
+}
+
+fs::path RepoRelative(const char* relativePath) {
+    return (RepoRootPath() / relativePath).lexically_normal();
+}
+
+const std::array<CoreValidationScenario, 9>& GetCoreValidationScenarios() {
+    static const std::array<CoreValidationScenario, 9> scenarios = { {
+        {
+            "core.input.keyboard_focus",
+            UIValidationDomain::Core,
+            "input",
+            "Core Input | Keyboard Focus",
+            RepoRelative("tests/UI/Core/integration/input/keyboard_focus/View.xcui"),
+            RepoRelative("tests/UI/Core/integration/shared/themes/core_validation.xctheme"),
+            RepoRelative("tests/UI/Core/integration/input/keyboard_focus/captures")
+        },
+        {
+            "core.input.pointer_states",
+            UIValidationDomain::Core,
+            "input",
+            "Core Input | Pointer States",
+            RepoRelative("tests/UI/Core/integration/input/pointer_states/View.xcui"),
+            RepoRelative("tests/UI/Core/integration/shared/themes/core_validation.xctheme"),
+            RepoRelative("tests/UI/Core/integration/input/pointer_states/captures")
+        },
+        {
+            "core.input.scroll_view",
+            UIValidationDomain::Core,
+            "input",
+            "Core Input | Scroll View",
+            RepoRelative("tests/UI/Core/integration/input/scroll_view/View.xcui"),
+            RepoRelative("tests/UI/Core/integration/shared/themes/core_validation.xctheme"),
+            RepoRelative("tests/UI/Core/integration/input/scroll_view/captures")
+        },
+        {
+            "core.input.shortcut_scope",
+            UIValidationDomain::Core,
+            "input",
+            "Core Input | Shortcut Scope",
+            RepoRelative("tests/UI/Core/integration/input/shortcut_scope/View.xcui"),
+            RepoRelative("tests/UI/Core/integration/shared/themes/core_validation.xctheme"),
+            RepoRelative("tests/UI/Core/integration/input/shortcut_scope/captures")
+        },
+        {
+            "core.layout.splitter_resize",
+            UIValidationDomain::Core,
+            "layout",
+            "Core Layout | Splitter Resize",
+            RepoRelative("tests/UI/Core/integration/layout/splitter_resize/View.xcui"),
+            RepoRelative("tests/UI/Core/integration/shared/themes/core_validation.xctheme"),
+            RepoRelative("tests/UI/Core/integration/layout/splitter_resize/captures")
+        },
+        {
+            "core.layout.tab_strip_selection",
+            UIValidationDomain::Core,
+            "layout",
+            "Core Layout | TabStrip Selection",
+            RepoRelative("tests/UI/Core/integration/layout/tab_strip_selection/View.xcui"),
+            RepoRelative("tests/UI/Core/integration/shared/themes/core_validation.xctheme"),
+            RepoRelative("tests/UI/Core/integration/layout/tab_strip_selection/captures")
+        },
+        {
+            "core.layout.workspace_compose",
+            UIValidationDomain::Core,
+            "layout",
+            "Core Layout | Workspace Compose",
+            RepoRelative("tests/UI/Core/integration/layout/workspace_compose/View.xcui"),
+            RepoRelative("tests/UI/Core/integration/shared/themes/core_validation.xctheme"),
+            RepoRelative("tests/UI/Core/integration/layout/workspace_compose/captures")
+        },
+        {
+            "core.style.theme_tokens",
+            UIValidationDomain::Core,
+            "style",
+            "Core Style | Theme Tokens",
+            RepoRelative("tests/UI/Core/integration/style/theme_tokens/View.xcui"),
+            RepoRelative("tests/UI/Core/integration/shared/themes/core_validation.xctheme"),
+            RepoRelative("tests/UI/Core/integration/style/theme_tokens/captures")
+        },
+        {
+            "core.text.utf8_focus_surface",
+            UIValidationDomain::Core,
+            "text",
+            "Core Text | UTF-8 Focus Surface",
+            RepoRelative("tests/UI/Core/integration/text/utf8_focus_surface/View.xcui"),
+            RepoRelative("tests/UI/Core/integration/shared/themes/core_validation.xctheme"),
+            RepoRelative("tests/UI/Core/integration/text/utf8_focus_surface/captures")
+        }
+    } };
+    return scenarios;
+}
+
+} // namespace
+
+const CoreValidationScenario& GetDefaultCoreValidationScenario() {
+    return GetCoreValidationScenarios().front();
+}
+
+const CoreValidationScenario* FindCoreValidationScenario(std::string_view id) {
+    for (const CoreValidationScenario& scenario : GetCoreValidationScenarios()) {
+        if (scenario.id == id) {
+            return &scenario;
+        }
+    }
+
+    return nullptr;
+}
+
+} // namespace XCEngine::Tests::CoreUI

tests/UI/Core/integration/shared/src/CoreValidationScenario.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <filesystem>
+#include <string>
+#include <string_view>
+
+namespace XCEngine::Tests::CoreUI {
+
+enum class UIValidationDomain : unsigned char {
+    Core = 0
+};
+
+struct CoreValidationScenario {
+    std::string id = {};
+    UIValidationDomain domain = UIValidationDomain::Core;
+    std::string categoryId = {};
+    std::string displayName = {};
+    std::filesystem::path documentPath = {};
+    std::filesystem::path themePath = {};
+    std::filesystem::path captureRootPath = {};
+};
+
+const CoreValidationScenario& GetDefaultCoreValidationScenario();
+const CoreValidationScenario* FindCoreValidationScenario(std::string_view id);
+
+} // namespace XCEngine::Tests::CoreUI

tests/UI/Core/integration/shared/src/InputModifierTracker.h

@@ -0,0 +1,173 @@
+#pragma once
+
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+
+#include <XCEngine/UI/Types.h>
+
+#include <windows.h>
+
+#include <cstddef>
+#include <cstdint>
+
+namespace XCEngine::Tests::CoreUI::Host {
+
+class InputModifierTracker {
+public:
+    void Reset() {
+        m_leftShift = false;
+        m_rightShift = false;
+        m_leftControl = false;
+        m_rightControl = false;
+        m_leftAlt = false;
+        m_rightAlt = false;
+        m_leftSuper = false;
+        m_rightSuper = false;
+    }
+
+    void SyncFromSystemState() {
+        m_leftShift = (GetKeyState(VK_LSHIFT) & 0x8000) != 0;
+        m_rightShift = (GetKeyState(VK_RSHIFT) & 0x8000) != 0;
+        m_leftControl = (GetKeyState(VK_LCONTROL) & 0x8000) != 0;
+        m_rightControl = (GetKeyState(VK_RCONTROL) & 0x8000) != 0;
+        m_leftAlt = (GetKeyState(VK_LMENU) & 0x8000) != 0;
+        m_rightAlt = (GetKeyState(VK_RMENU) & 0x8000) != 0;
+        m_leftSuper = (GetKeyState(VK_LWIN) & 0x8000) != 0;
+        m_rightSuper = (GetKeyState(VK_RWIN) & 0x8000) != 0;
+    }
+
+    ::XCEngine::UI::UIInputModifiers GetCurrentModifiers() const {
+        return BuildModifiers();
+    }
+
+    ::XCEngine::UI::UIInputModifiers BuildPointerModifiers(std::size_t wParam) const {
+        ::XCEngine::UI::UIInputModifiers modifiers = BuildModifiers();
+        modifiers.shift = modifiers.shift || (wParam & MK_SHIFT) != 0;
+        modifiers.control = modifiers.control || (wParam & MK_CONTROL) != 0;
+        return modifiers;
+    }
+
+    ::XCEngine::UI::UIInputModifiers ApplyKeyMessage(
+        ::XCEngine::UI::UIInputEventType type,
+        WPARAM wParam,
+        LPARAM lParam) {
+        if (type == ::XCEngine::UI::UIInputEventType::KeyDown) {
+            SetModifierState(ResolveModifierKey(wParam, lParam), true);
+        } else if (type == ::XCEngine::UI::UIInputEventType::KeyUp) {
+            SetModifierState(ResolveModifierKey(wParam, lParam), false);
+        }
+
+        return BuildModifiers();
+    }
+
+private:
+    enum class ModifierKey : std::uint8_t {
+        None = 0,
+        LeftShift,
+        RightShift,
+        LeftControl,
+        RightControl,
+        LeftAlt,
+        RightAlt,
+        LeftSuper,
+        RightSuper
+    };
+
+    static bool IsExtendedKey(LPARAM lParam) {
+        return (static_cast<std::uint32_t>(lParam) & 0x01000000u) != 0u;
+    }
+
+    static std::uint32_t ExtractScanCode(LPARAM lParam) {
+        return (static_cast<std::uint32_t>(lParam) >> 16u) & 0xffu;
+    }
+
+    static ModifierKey ResolveModifierKey(WPARAM wParam, LPARAM lParam) {
+        switch (static_cast<std::uint32_t>(wParam)) {
+        case VK_SHIFT: {
+            const UINT shiftVirtualKey = MapVirtualKeyW(ExtractScanCode(lParam), MAPVK_VSC_TO_VK_EX);
+            return shiftVirtualKey == VK_RSHIFT
+                ? ModifierKey::RightShift
+                : ModifierKey::LeftShift;
+        }
+        case VK_LSHIFT:
+            return ModifierKey::LeftShift;
+        case VK_RSHIFT:
+            return ModifierKey::RightShift;
+        case VK_CONTROL:
+            return IsExtendedKey(lParam)
+                ? ModifierKey::RightControl
+                : ModifierKey::LeftControl;
+        case VK_LCONTROL:
+            return ModifierKey::LeftControl;
+        case VK_RCONTROL:
+            return ModifierKey::RightControl;
+        case VK_MENU:
+            return IsExtendedKey(lParam)
+                ? ModifierKey::RightAlt
+                : ModifierKey::LeftAlt;
+        case VK_LMENU:
+            return ModifierKey::LeftAlt;
+        case VK_RMENU:
+            return ModifierKey::RightAlt;
+        case VK_LWIN:
+            return ModifierKey::LeftSuper;
+        case VK_RWIN:
+            return ModifierKey::RightSuper;
+        default:
+            return ModifierKey::None;
+        }
+    }
+
+    void SetModifierState(ModifierKey key, bool pressed) {
+        switch (key) {
+        case ModifierKey::LeftShift:
+            m_leftShift = pressed;
+            break;
+        case ModifierKey::RightShift:
+            m_rightShift = pressed;
+            break;
+        case ModifierKey::LeftControl:
+            m_leftControl = pressed;
+            break;
+        case ModifierKey::RightControl:
+            m_rightControl = pressed;
+            break;
+        case ModifierKey::LeftAlt:
+            m_leftAlt = pressed;
+            break;
+        case ModifierKey::RightAlt:
+            m_rightAlt = pressed;
+            break;
+        case ModifierKey::LeftSuper:
+            m_leftSuper = pressed;
+            break;
+        case ModifierKey::RightSuper:
+            m_rightSuper = pressed;
+            break;
+        case ModifierKey::None:
+        default:
+            break;
+        }
+    }
+
+    ::XCEngine::UI::UIInputModifiers BuildModifiers() const {
+        ::XCEngine::UI::UIInputModifiers modifiers = {};
+        modifiers.shift = m_leftShift || m_rightShift;
+        modifiers.control = m_leftControl || m_rightControl;
+        modifiers.alt = m_leftAlt || m_rightAlt;
+        modifiers.super = m_leftSuper || m_rightSuper;
+        return modifiers;
+    }
+
+    bool m_leftShift = false;
+    bool m_rightShift = false;
+    bool m_leftControl = false;
+    bool m_rightControl = false;
+    bool m_leftAlt = false;
+    bool m_rightAlt = false;
+    bool m_leftSuper = false;
+    bool m_rightSuper = false;
+};
+
+} // namespace XCEngine::Tests::CoreUI::Host

tests/UI/Core/integration/shared/src/NativeRenderer.cpp

@@ -0,0 +1,485 @@
+#include "NativeRenderer.h"
+
+#include <algorithm>
+#include <cmath>
+#include <filesystem>
+
+namespace XCEngine::Tests::CoreUI::Host {
+
+namespace {
+
+D2D1_RECT_F ToD2DRect(const ::XCEngine::UI::UIRect& rect) {
+    return D2D1::RectF(rect.x, rect.y, rect.x + rect.width, rect.y + rect.height);
+}
+
+std::string HrToString(const char* operation, HRESULT hr) {
+    char buffer[128] = {};
+    sprintf_s(buffer, "%s failed with hr=0x%08X.", operation, static_cast<unsigned int>(hr));
+    return buffer;
+}
+
+} // namespace
+
+bool NativeRenderer::Initialize(HWND hwnd) {
+    Shutdown();
+
+    if (hwnd == nullptr) {
+        return false;
+    }
+
+    m_hwnd = hwnd;
+    if (FAILED(D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED, m_d2dFactory.ReleaseAndGetAddressOf()))) {
+        Shutdown();
+        return false;
+    }
+
+    if (FAILED(DWriteCreateFactory(
+            DWRITE_FACTORY_TYPE_SHARED,
+            __uuidof(IDWriteFactory),
+            reinterpret_cast<IUnknown**>(m_dwriteFactory.ReleaseAndGetAddressOf())))) {
+        Shutdown();
+        return false;
+    }
+
+    return EnsureRenderTarget();
+}
+
+void NativeRenderer::Shutdown() {
+    m_textFormats.clear();
+    m_solidBrush.Reset();
+    m_renderTarget.Reset();
+    m_wicFactory.Reset();
+    m_dwriteFactory.Reset();
+    m_d2dFactory.Reset();
+    if (m_wicComInitialized) {
+        CoUninitialize();
+        m_wicComInitialized = false;
+    }
+    m_hwnd = nullptr;
+}
+
+void NativeRenderer::Resize(UINT width, UINT height) {
+    if (!m_renderTarget || width == 0 || height == 0) {
+        return;
+    }
+
+    const HRESULT hr = m_renderTarget->Resize(D2D1::SizeU(width, height));
+    if (hr == D2DERR_RECREATE_TARGET) {
+        DiscardRenderTarget();
+    }
+}
+
+bool NativeRenderer::Render(const ::XCEngine::UI::UIDrawData& drawData) {
+    if (!EnsureRenderTarget()) {
+        return false;
+    }
+
+    const bool rendered = RenderToTarget(*m_renderTarget.Get(), *m_solidBrush.Get(), drawData);
+    const HRESULT hr = m_renderTarget->EndDraw();
+    if (hr == D2DERR_RECREATE_TARGET) {
+        DiscardRenderTarget();
+        return false;
+    }
+
+    return rendered && SUCCEEDED(hr);
+}
+
+bool NativeRenderer::CaptureToPng(
+    const ::XCEngine::UI::UIDrawData& drawData,
+    UINT width,
+    UINT height,
+    const std::filesystem::path& outputPath,
+    std::string& outError) {
+    outError.clear();
+    if (width == 0 || height == 0) {
+        outError = "CaptureToPng rejected an empty render size.";
+        return false;
+    }
+
+    if (!m_d2dFactory || !m_dwriteFactory) {
+        outError = "CaptureToPng requires an initialized NativeRenderer.";
+        return false;
+    }
+
+    if (!EnsureWicFactory(outError)) {
+        return false;
+    }
+
+    std::error_code errorCode = {};
+    std::filesystem::create_directories(outputPath.parent_path(), errorCode);
+    if (errorCode) {
+        outError = "Failed to create screenshot directory: " + outputPath.parent_path().string();
+        return false;
+    }
+
+    Microsoft::WRL::ComPtr<IWICBitmap> bitmap;
+    HRESULT hr = m_wicFactory->CreateBitmap(
+        width,
+        height,
+        GUID_WICPixelFormat32bppPBGRA,
+        WICBitmapCacheOnLoad,
+        bitmap.ReleaseAndGetAddressOf());
+    if (FAILED(hr)) {
+        outError = HrToString("IWICImagingFactory::CreateBitmap", hr);
+        return false;
+    }
+
+    const D2D1_RENDER_TARGET_PROPERTIES renderTargetProperties = D2D1::RenderTargetProperties(
+        D2D1_RENDER_TARGET_TYPE_DEFAULT,
+        D2D1::PixelFormat(DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_PREMULTIPLIED));
+
+    Microsoft::WRL::ComPtr<ID2D1RenderTarget> offscreenRenderTarget;
+    hr = m_d2dFactory->CreateWicBitmapRenderTarget(
+        bitmap.Get(),
+        renderTargetProperties,
+        offscreenRenderTarget.ReleaseAndGetAddressOf());
+    if (FAILED(hr)) {
+        outError = HrToString("ID2D1Factory::CreateWicBitmapRenderTarget", hr);
+        return false;
+    }
+
+    Microsoft::WRL::ComPtr<ID2D1SolidColorBrush> offscreenBrush;
+    hr = offscreenRenderTarget->CreateSolidColorBrush(
+        D2D1::ColorF(1.0f, 1.0f, 1.0f, 1.0f),
+        offscreenBrush.ReleaseAndGetAddressOf());
+    if (FAILED(hr)) {
+        outError = HrToString("ID2D1RenderTarget::CreateSolidColorBrush", hr);
+        return false;
+    }
+
+    const bool rendered = RenderToTarget(*offscreenRenderTarget.Get(), *offscreenBrush.Get(), drawData);
+    hr = offscreenRenderTarget->EndDraw();
+    if (!rendered || FAILED(hr)) {
+        outError = HrToString("ID2D1RenderTarget::EndDraw", hr);
+        return false;
+    }
+
+    const std::wstring wideOutputPath = outputPath.wstring();
+    Microsoft::WRL::ComPtr<IWICStream> stream;
+    hr = m_wicFactory->CreateStream(stream.ReleaseAndGetAddressOf());
+    if (FAILED(hr)) {
+        outError = HrToString("IWICImagingFactory::CreateStream", hr);
+        return false;
+    }
+
+    hr = stream->InitializeFromFilename(wideOutputPath.c_str(), GENERIC_WRITE);
+    if (FAILED(hr)) {
+        outError = HrToString("IWICStream::InitializeFromFilename", hr);
+        return false;
+    }
+
+    Microsoft::WRL::ComPtr<IWICBitmapEncoder> encoder;
+    hr = m_wicFactory->CreateEncoder(GUID_ContainerFormatPng, nullptr, encoder.ReleaseAndGetAddressOf());
+    if (FAILED(hr)) {
+        outError = HrToString("IWICImagingFactory::CreateEncoder", hr);
+        return false;
+    }
+
+    hr = encoder->Initialize(stream.Get(), WICBitmapEncoderNoCache);
+    if (FAILED(hr)) {
+        outError = HrToString("IWICBitmapEncoder::Initialize", hr);
+        return false;
+    }
+
+    Microsoft::WRL::ComPtr<IWICBitmapFrameEncode> frame;
+    Microsoft::WRL::ComPtr<IPropertyBag2> propertyBag;
+    hr = encoder->CreateNewFrame(frame.ReleaseAndGetAddressOf(), propertyBag.ReleaseAndGetAddressOf());
+    if (FAILED(hr)) {
+        outError = HrToString("IWICBitmapEncoder::CreateNewFrame", hr);
+        return false;
+    }
+
+    hr = frame->Initialize(propertyBag.Get());
+    if (FAILED(hr)) {
+        outError = HrToString("IWICBitmapFrameEncode::Initialize", hr);
+        return false;
+    }
+
+    hr = frame->SetSize(width, height);
+    if (FAILED(hr)) {
+        outError = HrToString("IWICBitmapFrameEncode::SetSize", hr);
+        return false;
+    }
+
+    WICPixelFormatGUID pixelFormat = GUID_WICPixelFormat32bppPBGRA;
+    hr = frame->SetPixelFormat(&pixelFormat);
+    if (FAILED(hr)) {
+        outError = HrToString("IWICBitmapFrameEncode::SetPixelFormat", hr);
+        return false;
+    }
+
+    hr = frame->WriteSource(bitmap.Get(), nullptr);
+    if (FAILED(hr)) {
+        outError = HrToString("IWICBitmapFrameEncode::WriteSource", hr);
+        return false;
+    }
+
+    hr = frame->Commit();
+    if (FAILED(hr)) {
+        outError = HrToString("IWICBitmapFrameEncode::Commit", hr);
+        return false;
+    }
+
+    hr = encoder->Commit();
+    if (FAILED(hr)) {
+        outError = HrToString("IWICBitmapEncoder::Commit", hr);
+        return false;
+    }
+
+    return true;
+}
+
+bool NativeRenderer::EnsureRenderTarget() {
+    if (!m_hwnd || !m_d2dFactory || !m_dwriteFactory) {
+        return false;
+    }
+
+    return CreateDeviceResources();
+}
+
+bool NativeRenderer::EnsureWicFactory(std::string& outError) {
+    outError.clear();
+    if (m_wicFactory) {
+        return true;
+    }
+
+    const HRESULT initHr = CoInitializeEx(nullptr, COINIT_MULTITHREADED);
+    if (FAILED(initHr) && initHr != RPC_E_CHANGED_MODE) {
+        outError = HrToString("CoInitializeEx", initHr);
+        return false;
+    }
+    if (SUCCEEDED(initHr)) {
+        m_wicComInitialized = true;
+    }
+
+    const HRESULT factoryHr = CoCreateInstance(
+        CLSID_WICImagingFactory,
+        nullptr,
+        CLSCTX_INPROC_SERVER,
+        IID_PPV_ARGS(m_wicFactory.ReleaseAndGetAddressOf()));
+    if (FAILED(factoryHr)) {
+        outError = HrToString("CoCreateInstance(CLSID_WICImagingFactory)", factoryHr);
+        return false;
+    }
+
+    return true;
+}
+
+void NativeRenderer::DiscardRenderTarget() {
+    m_solidBrush.Reset();
+    m_renderTarget.Reset();
+}
+
+bool NativeRenderer::CreateDeviceResources() {
+    if (m_renderTarget) {
+        return true;
+    }
+
+    RECT clientRect = {};
+    GetClientRect(m_hwnd, &clientRect);
+    const UINT width = static_cast<UINT>((std::max)(clientRect.right - clientRect.left, 1L));
+    const UINT height = static_cast<UINT>((std::max)(clientRect.bottom - clientRect.top, 1L));
+
+    const D2D1_RENDER_TARGET_PROPERTIES renderTargetProps = D2D1::RenderTargetProperties();
+    const D2D1_HWND_RENDER_TARGET_PROPERTIES hwndProps = D2D1::HwndRenderTargetProperties(
+        m_hwnd,
+        D2D1::SizeU(width, height));
+
+    if (FAILED(m_d2dFactory->CreateHwndRenderTarget(
+            renderTargetProps,
+            hwndProps,
+            m_renderTarget.ReleaseAndGetAddressOf()))) {
+        return false;
+    }
+
+    if (FAILED(m_renderTarget->CreateSolidColorBrush(
+            D2D1::ColorF(1.0f, 1.0f, 1.0f, 1.0f),
+            m_solidBrush.ReleaseAndGetAddressOf()))) {
+        DiscardRenderTarget();
+        return false;
+    }
+
+    m_renderTarget->SetTextAntialiasMode(D2D1_TEXT_ANTIALIAS_MODE_GRAYSCALE);
+    return true;
+}
+
+bool NativeRenderer::RenderToTarget(
+    ID2D1RenderTarget& renderTarget,
+    ID2D1SolidColorBrush& solidBrush,
+    const ::XCEngine::UI::UIDrawData& drawData) {
+    renderTarget.SetTextAntialiasMode(D2D1_TEXT_ANTIALIAS_MODE_GRAYSCALE);
+    renderTarget.BeginDraw();
+    renderTarget.Clear(D2D1::ColorF(0.04f, 0.05f, 0.06f, 1.0f));
+
+    std::vector<D2D1_RECT_F> clipStack = {};
+    for (const ::XCEngine::UI::UIDrawList& drawList : drawData.GetDrawLists()) {
+        for (const ::XCEngine::UI::UIDrawCommand& command : drawList.GetCommands()) {
+            RenderCommand(renderTarget, solidBrush, command, clipStack);
+        }
+    }
+
+    while (!clipStack.empty()) {
+        renderTarget.PopAxisAlignedClip();
+        clipStack.pop_back();
+    }
+
+    return true;
+}
+
+void NativeRenderer::RenderCommand(
+    ID2D1RenderTarget& renderTarget,
+    ID2D1SolidColorBrush& solidBrush,
+    const ::XCEngine::UI::UIDrawCommand& command,
+    std::vector<D2D1_RECT_F>& clipStack) {
+    solidBrush.SetColor(ToD2DColor(command.color));
+
+    switch (command.type) {
+    case ::XCEngine::UI::UIDrawCommandType::FilledRect: {
+        const D2D1_RECT_F rect = ToD2DRect(command.rect);
+        if (command.rounding > 0.0f) {
+            renderTarget.FillRoundedRectangle(
+                D2D1::RoundedRect(rect, command.rounding, command.rounding),
+                &solidBrush);
+        } else {
+            renderTarget.FillRectangle(rect, &solidBrush);
+        }
+        break;
+    }
+    case ::XCEngine::UI::UIDrawCommandType::RectOutline: {
+        const D2D1_RECT_F rect = ToD2DRect(command.rect);
+        const float thickness = command.thickness > 0.0f ? command.thickness : 1.0f;
+        if (command.rounding > 0.0f) {
+            renderTarget.DrawRoundedRectangle(
+                D2D1::RoundedRect(rect, command.rounding, command.rounding),
+                &solidBrush,
+                thickness);
+        } else {
+            renderTarget.DrawRectangle(rect, &solidBrush, thickness);
+        }
+        break;
+    }
+    case ::XCEngine::UI::UIDrawCommandType::Text: {
+        if (command.text.empty()) {
+            break;
+        }
+
+        const float fontSize = command.fontSize > 0.0f ? command.fontSize : 16.0f;
+        IDWriteTextFormat* textFormat = GetTextFormat(fontSize);
+        if (textFormat == nullptr) {
+            break;
+        }
+
+        const std::wstring text = Utf8ToWide(command.text);
+        if (text.empty()) {
+            break;
+        }
+
+        const D2D1_SIZE_F targetSize = renderTarget.GetSize();
+        const D2D1_RECT_F layoutRect = D2D1::RectF(
+            command.position.x,
+            command.position.y,
+            targetSize.width,
+            command.position.y + fontSize * 1.8f);
+        renderTarget.DrawTextW(
+            text.c_str(),
+            static_cast<UINT32>(text.size()),
+            textFormat,
+            layoutRect,
+            &solidBrush,
+            D2D1_DRAW_TEXT_OPTIONS_CLIP,
+            DWRITE_MEASURING_MODE_NATURAL);
+        break;
+    }
+    case ::XCEngine::UI::UIDrawCommandType::Image: {
+        if (!command.texture.IsValid()) {
+            break;
+        }
+
+        const D2D1_RECT_F rect = ToD2DRect(command.rect);
+        renderTarget.DrawRectangle(rect, &solidBrush, 1.0f);
+        break;
+    }
+    case ::XCEngine::UI::UIDrawCommandType::PushClipRect: {
+        const D2D1_RECT_F rect = ToD2DRect(command.rect);
+        renderTarget.PushAxisAlignedClip(rect, D2D1_ANTIALIAS_MODE_PER_PRIMITIVE);
+        clipStack.push_back(rect);
+        break;
+    }
+    case ::XCEngine::UI::UIDrawCommandType::PopClipRect: {
+        if (!clipStack.empty()) {
+            renderTarget.PopAxisAlignedClip();
+            clipStack.pop_back();
+        }
+        break;
+    }
+    default:
+        break;
+    }
+}
+
+IDWriteTextFormat* NativeRenderer::GetTextFormat(float fontSize) {
+    if (!m_dwriteFactory) {
+        return nullptr;
+    }
+
+    const int key = static_cast<int>(std::lround(fontSize * 10.0f));
+    const auto found = m_textFormats.find(key);
+    if (found != m_textFormats.end()) {
+        return found->second.Get();
+    }
+
+    Microsoft::WRL::ComPtr<IDWriteTextFormat> textFormat;
+    const HRESULT hr = m_dwriteFactory->CreateTextFormat(
+        L"Segoe UI",
+        nullptr,
+        DWRITE_FONT_WEIGHT_REGULAR,
+        DWRITE_FONT_STYLE_NORMAL,
+        DWRITE_FONT_STRETCH_NORMAL,
+        fontSize,
+        L"",
+        textFormat.ReleaseAndGetAddressOf());
+    if (FAILED(hr)) {
+        return nullptr;
+    }
+
+    textFormat->SetTextAlignment(DWRITE_TEXT_ALIGNMENT_LEADING);
+    textFormat->SetParagraphAlignment(DWRITE_PARAGRAPH_ALIGNMENT_NEAR);
+    textFormat->SetWordWrapping(DWRITE_WORD_WRAPPING_NO_WRAP);
+
+    IDWriteTextFormat* result = textFormat.Get();
+    m_textFormats.emplace(key, std::move(textFormat));
+    return result;
+}
+
+D2D1_COLOR_F NativeRenderer::ToD2DColor(const ::XCEngine::UI::UIColor& color) {
+    return D2D1::ColorF(color.r, color.g, color.b, color.a);
+}
+
+std::wstring NativeRenderer::Utf8ToWide(std::string_view text) {
+    if (text.empty()) {
+        return {};
+    }
+
+    const int sizeNeeded = MultiByteToWideChar(
+        CP_UTF8,
+        0,
+        text.data(),
+        static_cast<int>(text.size()),
+        nullptr,
+        0);
+    if (sizeNeeded <= 0) {
+        return {};
+    }
+
+    std::wstring wideText(static_cast<size_t>(sizeNeeded), L'\0');
+    MultiByteToWideChar(
+        CP_UTF8,
+        0,
+        text.data(),
+        static_cast<int>(text.size()),
+        wideText.data(),
+        sizeNeeded);
+    return wideText;
+}
+
+} // namespace XCEngine::Tests::CoreUI::Host

tests/UI/Core/integration/shared/src/NativeRenderer.h

@@ -0,0 +1,65 @@
+#pragma once
+
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+
+#include <XCEngine/UI/DrawData.h>
+
+#include <d2d1.h>
+#include <dwrite.h>
+#include <wincodec.h>
+#include <windows.h>
+#include <wrl/client.h>
+
+#include <filesystem>
+#include <string>
+#include <string_view>
+#include <unordered_map>
+#include <vector>
+
+namespace XCEngine::Tests::CoreUI::Host {
+
+class NativeRenderer {
+public:
+    bool Initialize(HWND hwnd);
+    void Shutdown();
+    void Resize(UINT width, UINT height);
+    bool Render(const ::XCEngine::UI::UIDrawData& drawData);
+    bool CaptureToPng(
+        const ::XCEngine::UI::UIDrawData& drawData,
+        UINT width,
+        UINT height,
+        const std::filesystem::path& outputPath,
+        std::string& outError);
+
+private:
+    bool EnsureRenderTarget();
+    bool EnsureWicFactory(std::string& outError);
+    void DiscardRenderTarget();
+    bool CreateDeviceResources();
+    bool RenderToTarget(
+        ID2D1RenderTarget& renderTarget,
+        ID2D1SolidColorBrush& solidBrush,
+        const ::XCEngine::UI::UIDrawData& drawData);
+    void RenderCommand(
+        ID2D1RenderTarget& renderTarget,
+        ID2D1SolidColorBrush& solidBrush,
+        const ::XCEngine::UI::UIDrawCommand& command,
+        std::vector<D2D1_RECT_F>& clipStack);
+
+    IDWriteTextFormat* GetTextFormat(float fontSize);
+    static D2D1_COLOR_F ToD2DColor(const ::XCEngine::UI::UIColor& color);
+    static std::wstring Utf8ToWide(std::string_view text);
+
+    HWND m_hwnd = nullptr;
+    Microsoft::WRL::ComPtr<ID2D1Factory> m_d2dFactory;
+    Microsoft::WRL::ComPtr<IDWriteFactory> m_dwriteFactory;
+    Microsoft::WRL::ComPtr<IWICImagingFactory> m_wicFactory;
+    Microsoft::WRL::ComPtr<ID2D1HwndRenderTarget> m_renderTarget;
+    Microsoft::WRL::ComPtr<ID2D1SolidColorBrush> m_solidBrush;
+    std::unordered_map<int, Microsoft::WRL::ComPtr<IDWriteTextFormat>> m_textFormats;
+    bool m_wicComInitialized = false;
+};
+
+} // namespace XCEngine::Tests::CoreUI::Host

tests/UI/Core/integration/shared/themes/core_validation.xctheme

@@ -0,0 +1,65 @@
+<Theme name="CoreValidationTheme">
+  <Tokens>
+    <Color name="color.bg.workspace" value="#1C1C1C" />
+    <Color name="color.bg.panel" value="#292929" />
+    <Color name="color.bg.accent" value="#3A3A3A" />
+    <Color name="color.bg.selection" value="#4A4A4A" />
+    <Color name="color.style.warm" value="#4A3426" />
+    <Color name="color.style.cool" value="#243C4C" />
+    <Color name="color.style.borderWarm" value="#D0925B" />
+    <Color name="color.style.borderCool" value="#6BA3C7" />
+    <Color name="color.style.buttonAccent" value="#4B5E7B" />
+    <Color name="color.text.primary" value="#EEEEEE" />
+    <Color name="color.text.muted" value="#B0B0B0" />
+    <Spacing name="space.panel" value="12" />
+    <Spacing name="space.shell" value="18" />
+    <Spacing name="space.loose" value="18" />
+    <Radius name="radius.panel" value="10" />
+    <Radius name="radius.control" value="8" />
+    <Radius name="radius.loose" value="16" />
+  </Tokens>
+
+  <Widgets>
+    <Widget type="View" style="CoreWorkspace">
+      <Property name="background" value="color.bg.workspace" />
+      <Property name="padding" value="space.shell" />
+    </Widget>
+
+    <Widget type="Card" style="CorePanel">
+      <Property name="background" value="color.bg.panel" />
+      <Property name="radius" value="radius.panel" />
+      <Property name="padding" value="space.panel" />
+    </Widget>
+
+    <Widget type="Card" style="CoreStyleWarmCard">
+      <Property name="background" value="color.style.warm" />
+      <Property name="borderColor" value="color.style.borderWarm" />
+      <Property name="borderWidth" value="1" />
+      <Property name="padding" value="space.loose" />
+      <Property name="radius" value="radius.loose" />
+    </Widget>
+
+    <Widget type="Card" style="CoreStyleCoolCard">
+      <Property name="background" value="color.style.cool" />
+      <Property name="borderColor" value="color.style.borderCool" />
+      <Property name="borderWidth" value="1" />
+      <Property name="padding" value="space.loose" />
+      <Property name="radius" value="radius.loose" />
+    </Widget>
+
+    <Widget type="Button" style="CoreChip">
+      <Property name="background" value="color.bg.selection" />
+      <Property name="radius" value="radius.control" />
+    </Widget>
+
+    <Widget type="Button" style="CoreStyleAccentButton">
+      <Property name="background" value="color.style.buttonAccent" />
+      <Property name="radius" value="radius.control" />
+    </Widget>
+
+    <Widget type="Text" style="CoreTextMuted">
+      <Property name="foreground" value="color.text.muted" />
+      <Property name="fontSize" value="14" />
+    </Widget>
+  </Widgets>
+</Theme>

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

@@ -0,0 +1,6 @@
+add_subdirectory(theme_tokens)
+
+add_custom_target(core_ui_style_integration_tests
+    DEPENDS
+        core_ui_style_theme_tokens_validation
+)

tests/UI/Core/integration/style/theme_tokens/CMakeLists.txt

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

tests/UI/Core/integration/style/theme_tokens/View.xcui

@@ -0,0 +1,50 @@
+<View
+  name="CoreStyleThemeTokens"
+  theme="../../shared/themes/core_validation.xctheme"
+  style="CoreWorkspace">
+  <Column padding="24" gap="16">
+    <Card
+      title="测试内容：Core Style 主题 Token 与样式优先级"
+      subtitle="只验证 shared theme / named style / inline override；不验证上层业务面板"
+      tone="accent"
+      height="108">
+      <Column gap="8">
+        <Text text="1. 检查下面三张卡片的背景、边框、圆角是否明显不同。" />
+        <Text text="2. Named Style Warm / Cool 应直接体现主题 Token；Inline Override 应覆盖同名样式的背景色。" />
+        <Text text="3. 下方 Accent Button 应明显区别于默认按钮，用来确认 widget named style 已生效。" />
+      </Column>
+    </Card>
+
+    <Column gap="12">
+      <Card id="style-warm-card" style="CoreStyleWarmCard" title="Named Style Warm" subtitle="theme named style" height="112">
+        <Column gap="6">
+          <Text text="预期：暖色背景 + 暖色边框 + 较大的 padding。" />
+        </Column>
+      </Card>
+
+      <Card id="style-cool-card" style="CoreStyleCoolCard" title="Named Style Cool" subtitle="theme named style" height="112">
+        <Column gap="6">
+          <Text text="预期：冷色背景 + 冷色边框；应与 Warm 卡片明显区分。" />
+        </Column>
+      </Card>
+
+      <Card
+        id="style-inline-card"
+        style="CoreStyleWarmCard"
+        background="#6B4A2D"
+        borderColor="#D8A56B"
+        title="Inline Override"
+        subtitle="inline background overrides named style"
+        height="112">
+        <Column gap="6">
+          <Text text="预期：仍保留 Warm 卡片结构，但背景和边框应以 inline 值为准。" />
+        </Column>
+      </Card>
+    </Column>
+
+    <Row gap="12">
+      <Button id="style-default-button" text="Default Button" />
+      <Button id="style-accent-button" style="CoreStyleAccentButton" text="Accent Button" />
+    </Row>
+  </Column>
+</View>

tests/UI/Core/integration/style/theme_tokens/captures/.gitkeep

@@ -0,0 +1 @@
+

tests/UI/Core/integration/style/theme_tokens/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.style.theme_tokens");
+}

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

@@ -0,0 +1,6 @@
+add_subdirectory(utf8_focus_surface)
+
+add_custom_target(core_ui_text_integration_tests
+    DEPENDS
+        core_ui_text_utf8_focus_surface_validation
+)

tests/UI/Core/integration/text/utf8_focus_surface/CMakeLists.txt

@@ -0,0 +1,35 @@
+set(CORE_UI_TEXT_UTF8_FOCUS_SURFACE_RESOURCES
+    View.xcui
+    ${CMAKE_SOURCE_DIR}/tests/UI/Core/integration/shared/themes/core_validation.xctheme
+)
+
+add_executable(core_ui_text_utf8_focus_surface_validation WIN32
+    main.cpp
+    ${CORE_UI_TEXT_UTF8_FOCUS_SURFACE_RESOURCES}
+)
+
+target_include_directories(core_ui_text_utf8_focus_surface_validation PRIVATE
+    ${CMAKE_SOURCE_DIR}/tests/UI/Core/integration/shared/src
+    ${CMAKE_SOURCE_DIR}/engine/include
+)
+
+target_compile_definitions(core_ui_text_utf8_focus_surface_validation PRIVATE
+    UNICODE
+    _UNICODE
+)
+
+if(MSVC)
+    target_compile_options(core_ui_text_utf8_focus_surface_validation PRIVATE /utf-8 /FS)
+    set_property(TARGET core_ui_text_utf8_focus_surface_validation PROPERTY
+        MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL")
+endif()
+
+target_link_libraries(core_ui_text_utf8_focus_surface_validation PRIVATE
+    core_ui_integration_host
+)
+
+set_target_properties(core_ui_text_utf8_focus_surface_validation PROPERTIES
+    OUTPUT_NAME "XCUICoreTextUtf8FocusSurfaceValidation"
+)
+
+source_group(TREE "${CMAKE_CURRENT_SOURCE_DIR}" FILES View.xcui)

tests/UI/Core/integration/text/utf8_focus_surface/View.xcui

@@ -0,0 +1,43 @@
+<View
+  name="CoreTextUtf8FocusSurface"
+  theme="../../shared/themes/core_validation.xctheme"
+  style="CoreWorkspace">
+  <Column padding="24" gap="16">
+    <Card
+      title="测试内容：Core Text UTF-8 渲染与 textInput 焦点面"
+      subtitle="只验证共享文本渲染、字号差异和 textInput focus 标记；不伪造完整输入框"
+      tone="accent"
+      height="108">
+      <Column gap="8">
+        <Text text="1. 检查下面的 UTF-8 文本是否正常显示，不应出现乱码或错位。" />
+        <Text text="2. 按 Tab 把 focus 切到中间的 Text Input Surface，右下角 Text input 应变为 active。" />
+        <Text text="3. 再按 Tab / Shift+Tab 离开时，Text input 应恢复为 idle。" />
+      </Column>
+    </Card>
+
+    <Card title="UTF-8 Rendering" subtitle="shared text drawing only" height="144">
+      <Column gap="8">
+        <Text text="English / 中文 / UTF-8 / Delete / Backspace" />
+        <Text fontSize="20" text="大字号文本：删除键 Delete 与 Backspace 现在应分离。" />
+        <Text style="CoreTextMuted" text="多语言混排检查：层级、布局、主题、文本。" />
+      </Column>
+    </Card>
+
+    <Button id="text-focus-before" text="Focus Before" />
+
+    <Card
+      id="text-input-surface"
+      title="Text Input Surface"
+      subtitle="focusable + textInput marker"
+      focusable="true"
+      textInput="true"
+      height="132">
+      <Column gap="8">
+        <Text text="这个面板本身不是完整输入框，只用于验证 textInput focus 标记链路。" />
+        <Text text="当 focus 停在这里时，右下角 Text input 应显示 active。" />
+      </Column>
+    </Card>
+
+    <Button id="text-focus-after" text="Focus After" />
+  </Column>
+</View>

tests/UI/Core/integration/text/utf8_focus_surface/captures/.gitkeep

@@ -0,0 +1 @@
+

tests/UI/Core/integration/text/utf8_focus_surface/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.text.utf8_focus_surface");
+}