feat(xcui): advance core and editor validation flow

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

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+<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

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+#include "Application.h"
+
+int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE, LPWSTR, int nCmdShow) {
+    return XCEngine::Tests::CoreUI::RunCoreUIValidationApp(
+        hInstance,
+        nCmdShow,
+        "core.text.utf8_focus_surface");
+}