Stabilize XCEditor shell foundation widgets

tests/UI/Editor/integration/CMakeLists.txt

@@ -8,6 +8,8 @@ add_custom_target(editor_ui_integration_tests
     DEPENDS
         editor_ui_workspace_shell_compose_validation
         editor_ui_menu_bar_basic_validation
+        editor_ui_panel_frame_basic_validation
+        editor_ui_tab_strip_basic_validation
         editor_ui_panel_session_flow_validation
         editor_ui_layout_persistence_validation
         editor_ui_shortcut_dispatch_validation

tests/UI/Editor/integration/README.md

@@ -14,6 +14,8 @@ Layout:
 - `shared/`: shared host wrapper, scenario registry, shared theme
 - `shell/workspace_shell_compose/`: split/tab/panel shell compose only
 - `shell/menu_bar_basic/`: menu bar open/close/hover/dispatch only
+- `shell/panel_frame_basic/`: panel frame layout/state/hit-test only
+- `shell/tab_strip_basic/`: tab strip layout/state/hit-test/close/navigation only
 - `state/panel_session_flow/`: panel session state flow only
 - `state/layout_persistence/`: layout save/load/reset only
 - `state/shortcut_dispatch/`: shortcut match/suppression/dispatch only
@@ -30,6 +32,16 @@ Scenarios:
   Executable: `XCUIEditorMenuBarBasicValidation.exe`
   Scope: menu bar open/close, hover, dismiss, menu command dispatch only
 
+- `editor.shell.panel_frame_basic`
+  Build target: `editor_ui_panel_frame_basic_validation`
+  Executable: `XCUIEditorPanelFrameBasicValidation.exe`
+  Scope: panel frame header/body/footer layout, focus/active/hover chrome, pin/close hit target only
+
+- `editor.shell.tab_strip_basic`
+  Build target: `editor_ui_tab_strip_basic_validation`
+  Executable: `XCUIEditorTabStripBasicValidation.exe`
+  Scope: tab header layout, selected/hover/focus, close hit target, close fallback, Left/Right/Home/End navigation only
+
 - `editor.state.panel_session_flow`
   Build target: `editor_ui_panel_session_flow_validation`
   Executable: `XCUIEditorPanelSessionFlowValidation.exe`
@@ -59,6 +71,12 @@ Selected controls:
 - `shell/menu_bar_basic/`
   Click `File / Window / Layout`, move the mouse across menu items, click outside the menu or press `Esc`, press `F12`.
 
+- `shell/panel_frame_basic/`
+  Move the mouse over the preview panel, click `Body / Pin / Close`, toggle `Active / Focus / Closable / Footer`, press `F12`.
+
+- `shell/tab_strip_basic/`
+  Click `Document A / B / C`, click `X` on closable tabs, click content to focus, press `Left / Right / Home / End`, press `Reset`, press `F12`.
+
 - `state/panel_session_flow/`
   Click `Hide Active / Show Doc A / Close Doc B / Open Doc B / Activate Details / Reset`, press `F12`.
 

tests/UI/Editor/integration/shell/CMakeLists.txt

@@ -1,4 +1,6 @@
 add_subdirectory(workspace_shell_compose)
+add_subdirectory(panel_frame_basic)
+add_subdirectory(tab_strip_basic)
 if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/menu_bar_basic/CMakeLists.txt")
     add_subdirectory(menu_bar_basic)
 endif()

tests/UI/Editor/integration/shell/panel_frame_basic/CMakeLists.txt

@@ -0,0 +1,30 @@
+add_executable(editor_ui_panel_frame_basic_validation WIN32
+    main.cpp
+)
+
+target_include_directories(editor_ui_panel_frame_basic_validation PRIVATE
+    ${CMAKE_SOURCE_DIR}/new_editor/include
+    ${CMAKE_SOURCE_DIR}/new_editor/app
+    ${CMAKE_SOURCE_DIR}/engine/include
+)
+
+target_compile_definitions(editor_ui_panel_frame_basic_validation PRIVATE
+    UNICODE
+    _UNICODE
+    XCENGINE_EDITOR_UI_TESTS_REPO_ROOT="${XCENGINE_EDITOR_UI_TESTS_REPO_ROOT_PATH}"
+)
+
+if(MSVC)
+    target_compile_options(editor_ui_panel_frame_basic_validation PRIVATE /utf-8 /FS)
+    set_property(TARGET editor_ui_panel_frame_basic_validation PROPERTY
+        MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL")
+endif()
+
+target_link_libraries(editor_ui_panel_frame_basic_validation PRIVATE
+    XCUIEditorLib
+    XCUIEditorHost
+)
+
+set_target_properties(editor_ui_panel_frame_basic_validation PROPERTIES
+    OUTPUT_NAME "XCUIEditorPanelFrameBasicValidation"
+)

tests/UI/Editor/integration/shell/panel_frame_basic/captures/.gitkeep

@@ -0,0 +1 @@
+

tests/UI/Editor/integration/shell/panel_frame_basic/main.cpp

@@ -0,0 +1,520 @@
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+
+#include <XCEditor/Widgets/UIEditorPanelFrame.h>
+#include "Host/AutoScreenshot.h"
+#include "Host/NativeRenderer.h"
+
+#include <XCEngine/UI/DrawData.h>
+
+#include <windows.h>
+#include <windowsx.h>
+
+#include <algorithm>
+#include <filesystem>
+#include <string>
+#include <string_view>
+#include <vector>
+
+#ifndef XCENGINE_EDITOR_UI_TESTS_REPO_ROOT
+#define XCENGINE_EDITOR_UI_TESTS_REPO_ROOT "."
+#endif
+
+namespace {
+
+using XCEngine::UI::UIColor;
+using XCEngine::UI::UIDrawData;
+using XCEngine::UI::UIDrawList;
+using XCEngine::UI::UIPoint;
+using XCEngine::UI::UIRect;
+using XCEngine::UI::Editor::Host::AutoScreenshotController;
+using XCEngine::UI::Editor::Host::NativeRenderer;
+using XCEngine::UI::Editor::Widgets::AppendUIEditorPanelFrameBackground;
+using XCEngine::UI::Editor::Widgets::AppendUIEditorPanelFrameForeground;
+using XCEngine::UI::Editor::Widgets::BuildUIEditorPanelFrameLayout;
+using XCEngine::UI::Editor::Widgets::HitTestUIEditorPanelFrame;
+using XCEngine::UI::Editor::Widgets::UIEditorPanelFrameHitTarget;
+using XCEngine::UI::Editor::Widgets::UIEditorPanelFrameLayout;
+using XCEngine::UI::Editor::Widgets::UIEditorPanelFrameState;
+using XCEngine::UI::Editor::Widgets::UIEditorPanelFrameText;
+
+constexpr const wchar_t* kWindowClassName = L"XCUIEditorPanelFrameBasicValidation";
+constexpr const wchar_t* kWindowTitle = L"XCUI Editor | PanelFrame Basic";
+
+constexpr UIColor kWindowBg(0.13f, 0.13f, 0.13f, 1.0f);
+constexpr UIColor kCardBg(0.18f, 0.18f, 0.18f, 1.0f);
+constexpr UIColor kCardBorder(0.30f, 0.30f, 0.30f, 1.0f);
+constexpr UIColor kCardAccent(0.82f, 0.82f, 0.82f, 1.0f);
+constexpr UIColor kTextPrimary(0.94f, 0.94f, 0.94f, 1.0f);
+constexpr UIColor kTextMuted(0.72f, 0.72f, 0.72f, 1.0f);
+constexpr UIColor kTextWeak(0.56f, 0.56f, 0.56f, 1.0f);
+constexpr UIColor kButtonBg(0.26f, 0.26f, 0.26f, 1.0f);
+constexpr UIColor kButtonOnBg(0.42f, 0.42f, 0.42f, 1.0f);
+constexpr UIColor kButtonBorder(0.48f, 0.48f, 0.48f, 1.0f);
+
+enum class ActionId : unsigned char {
+    ToggleFooter = 0,
+    TogglePin,
+    ToggleClose,
+    Reset
+};
+
+struct ButtonState {
+    ActionId action = ActionId::ToggleFooter;
+    std::string label = {};
+    UIRect rect = {};
+    bool selected = false;
+};
+
+std::filesystem::path ResolveRepoRootPath() {
+    std::string root = XCENGINE_EDITOR_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();
+}
+
+bool ContainsPoint(const UIRect& rect, float x, float y) {
+    return x >= rect.x &&
+        x <= rect.x + rect.width &&
+        y >= rect.y &&
+        y <= rect.y + rect.height;
+}
+
+std::string DescribePart(UIEditorPanelFrameHitTarget part) {
+    switch (part) {
+    case UIEditorPanelFrameHitTarget::Header: return "Header";
+    case UIEditorPanelFrameHitTarget::Body: return "Body";
+    case UIEditorPanelFrameHitTarget::Footer: return "Footer";
+    case UIEditorPanelFrameHitTarget::PinButton: return "Pin";
+    case UIEditorPanelFrameHitTarget::CloseButton: return "Close";
+    default: return "None";
+    }
+}
+
+void DrawCard(
+    UIDrawList& drawList,
+    const UIRect& rect,
+    std::string_view title,
+    std::string_view subtitle = {}) {
+    drawList.AddFilledRect(rect, kCardBg, 10.0f);
+    drawList.AddRectOutline(rect, kCardBorder, 1.0f, 10.0f);
+    drawList.AddText(UIPoint(rect.x + 16.0f, rect.y + 14.0f), std::string(title), kTextPrimary, 17.0f);
+    if (!subtitle.empty()) {
+        drawList.AddText(UIPoint(rect.x + 16.0f, rect.y + 38.0f), std::string(subtitle), kTextMuted, 12.0f);
+    }
+}
+
+void DrawButton(
+    UIDrawList& drawList,
+    const ButtonState& button) {
+    drawList.AddFilledRect(button.rect, button.selected ? kButtonOnBg : kButtonBg, 8.0f);
+    drawList.AddRectOutline(button.rect, button.selected ? kCardAccent : kButtonBorder, 1.0f, 8.0f);
+    drawList.AddText(
+        UIPoint(button.rect.x + 12.0f, button.rect.y + 10.0f),
+        button.label,
+        kTextPrimary,
+        12.0f);
+}
+
+class ScenarioApp {
+public:
+    int 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);
+    }
+
+private:
+    static LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {
+        if (message == WM_NCCREATE) {
+            const auto* createStruct = reinterpret_cast<CREATESTRUCTW*>(lParam);
+            auto* app = reinterpret_cast<ScenarioApp*>(createStruct->lpCreateParams);
+            SetWindowLongPtrW(hwnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(app));
+            return TRUE;
+        }
+
+        auto* app = reinterpret_cast<ScenarioApp*>(GetWindowLongPtrW(hwnd, GWLP_USERDATA));
+        switch (message) {
+        case WM_SIZE:
+            if (app != nullptr && wParam != SIZE_MINIMIZED) {
+                app->OnResize(static_cast<UINT>(LOWORD(lParam)), static_cast<UINT>(HIWORD(lParam)));
+            }
+            return 0;
+        case WM_MOUSEMOVE:
+            if (app != nullptr) {
+                app->HandleMouseMove(
+                    static_cast<float>(GET_X_LPARAM(lParam)),
+                    static_cast<float>(GET_Y_LPARAM(lParam)));
+                return 0;
+            }
+            break;
+        case WM_MOUSELEAVE:
+            if (app != nullptr) {
+                app->HandleMouseLeave();
+                return 0;
+            }
+            break;
+        case WM_LBUTTONUP:
+            if (app != nullptr) {
+                app->HandleClick(
+                    static_cast<float>(GET_X_LPARAM(lParam)),
+                    static_cast<float>(GET_Y_LPARAM(lParam)));
+                return 0;
+            }
+            break;
+        case WM_KEYDOWN:
+        case WM_SYSKEYDOWN:
+            if (app != nullptr && wParam == VK_F12) {
+                app->m_autoScreenshot.RequestCapture("manual_f12");
+                return 0;
+            }
+            break;
+        case WM_PAINT:
+            if (app != nullptr) {
+                PAINTSTRUCT paintStruct = {};
+                BeginPaint(hwnd, &paintStruct);
+                app->RenderFrame();
+                EndPaint(hwnd, &paintStruct);
+                return 0;
+            }
+            break;
+        case WM_DESTROY:
+            PostQuitMessage(0);
+            return 0;
+        default:
+            break;
+        }
+
+        return DefWindowProcW(hwnd, message, wParam, lParam);
+    }
+
+    bool Initialize(HINSTANCE hInstance, int nCmdShow) {
+        m_captureRoot =
+            ResolveRepoRootPath() / "tests/UI/Editor/integration/shell/panel_frame_basic/captures";
+        m_autoScreenshot.Initialize(m_captureRoot);
+
+        WNDCLASSEXW windowClass = {};
+        windowClass.cbSize = sizeof(windowClass);
+        windowClass.style = CS_HREDRAW | CS_VREDRAW;
+        windowClass.lpfnWndProc = &ScenarioApp::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,
+            920,
+            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;
+        }
+
+        ResetState();
+        return true;
+    }
+
+    void Shutdown() {
+        m_autoScreenshot.Shutdown();
+        m_renderer.Shutdown();
+
+        if (m_hwnd != nullptr && IsWindow(m_hwnd)) {
+            DestroyWindow(m_hwnd);
+        }
+        m_hwnd = nullptr;
+
+        if (m_windowClassAtom != 0) {
+            UnregisterClassW(kWindowClassName, GetModuleHandleW(nullptr));
+            m_windowClassAtom = 0;
+        }
+    }
+
+    void OnResize(UINT width, UINT height) {
+        m_renderer.Resize(width, height);
+    }
+
+    void HandleMouseMove(float x, float y) {
+        m_mousePosition = UIPoint(x, y);
+        TRACKMOUSEEVENT event = {};
+        event.cbSize = sizeof(event);
+        event.dwFlags = TME_LEAVE;
+        event.hwndTrack = m_hwnd;
+        TrackMouseEvent(&event);
+        UpdateHoveredPart();
+    }
+
+    void HandleMouseLeave() {
+        m_mousePosition = UIPoint(-1000.0f, -1000.0f);
+        m_hoveredPart = UIEditorPanelFrameHitTarget::None;
+    }
+
+    void HandleClick(float x, float y) {
+        for (const ButtonState& button : m_buttons) {
+            if (ContainsPoint(button.rect, x, y)) {
+                ExecuteAction(button.action);
+                return;
+            }
+        }
+
+        const UIEditorPanelFrameHitTarget part =
+            HitTestUIEditorPanelFrame(m_layout, m_state, UIPoint(x, y));
+        switch (part) {
+        case UIEditorPanelFrameHitTarget::Header:
+            m_state.active = !m_state.active;
+            m_lastResult = m_state.active ? "Header click -> Active = On" : "Header click -> Active = Off";
+            break;
+        case UIEditorPanelFrameHitTarget::Body:
+        case UIEditorPanelFrameHitTarget::Footer:
+            m_state.focused = true;
+            m_lastResult = "Body/Footer click -> Focus = On";
+            break;
+        case UIEditorPanelFrameHitTarget::PinButton:
+            if (m_state.pinnable) {
+                m_state.pinned = !m_state.pinned;
+                m_lastResult = m_state.pinned ? "Pin click -> Pinned = On" : "Pin click -> Pinned = Off";
+            }
+            break;
+        case UIEditorPanelFrameHitTarget::CloseButton:
+            if (m_state.closable) {
+                ++m_closeDispatchCount;
+                m_lastResult = "Close click -> CloseRequested #" + std::to_string(m_closeDispatchCount);
+            }
+            break;
+        case UIEditorPanelFrameHitTarget::None:
+        default:
+            m_state.focused = false;
+            m_lastResult = "Outside click -> Focus = Off";
+            break;
+        }
+
+        UpdateHoveredPart();
+    }
+
+    void ExecuteAction(ActionId action) {
+        switch (action) {
+        case ActionId::ToggleFooter:
+            m_state.showFooter = !m_state.showFooter;
+            m_lastResult = m_state.showFooter ? "Footer = On" : "Footer = Off";
+            break;
+        case ActionId::TogglePin:
+            m_state.pinnable = !m_state.pinnable;
+            if (!m_state.pinnable) {
+                m_state.pinned = false;
+            }
+            m_lastResult = m_state.pinnable ? "Pin button = On" : "Pin button = Off";
+            break;
+        case ActionId::ToggleClose:
+            m_state.closable = !m_state.closable;
+            m_lastResult = m_state.closable ? "Close button = On" : "Close button = Off";
+            break;
+        case ActionId::Reset:
+            ResetState();
+            m_lastResult = "State reset";
+            break;
+        }
+    }
+
+    void ResetState() {
+        m_state = {};
+        m_state.active = true;
+        m_state.showFooter = true;
+        m_state.pinnable = true;
+        m_state.closable = true;
+        m_hoveredPart = UIEditorPanelFrameHitTarget::None;
+        m_lastResult = "Ready";
+        m_closeDispatchCount = 0;
+    }
+
+    void UpdateHoveredPart() {
+        m_hoveredPart = HitTestUIEditorPanelFrame(m_layout, m_state, m_mousePosition);
+    }
+
+    void BuildButtons(float left, float top, float width) {
+        const float buttonHeight = 34.0f;
+        const float gap = 10.0f;
+        m_buttons = {
+            { ActionId::ToggleFooter, "Footer", UIRect(left, top, width, buttonHeight), m_state.showFooter },
+            { ActionId::TogglePin, "Pin Button", UIRect(left, top + (buttonHeight + gap), width, buttonHeight), m_state.pinnable },
+            { ActionId::ToggleClose, "Close Button", UIRect(left, top + (buttonHeight + gap) * 2.0f, width, buttonHeight), m_state.closable },
+            { ActionId::Reset, "Reset", UIRect(left, top + (buttonHeight + gap) * 3.0f, width, buttonHeight), false }
+        };
+    }
+
+    void RenderFrame() {
+        RECT clientRect = {};
+        GetClientRect(m_hwnd, &clientRect);
+        const float width = static_cast<float>((std::max)(1L, clientRect.right - clientRect.left));
+        const float height = static_cast<float>((std::max)(1L, clientRect.bottom - clientRect.top));
+
+        const float leftColumnWidth = 340.0f;
+        const float outerPadding = 20.0f;
+        const UIRect introRect(outerPadding, outerPadding, leftColumnWidth, 148.0f);
+        const UIRect controlsRect(outerPadding, 188.0f, leftColumnWidth, 180.0f);
+        const UIRect stateRect(outerPadding, 388.0f, leftColumnWidth, 220.0f);
+        const UIRect panelRect(
+            leftColumnWidth + outerPadding * 2.0f,
+            outerPadding,
+            width - leftColumnWidth - outerPadding * 3.0f,
+            height - outerPadding * 2.0f);
+
+        BuildButtons(controlsRect.x + 16.0f, controlsRect.y + 54.0f, controlsRect.width - 32.0f);
+
+        UIDrawData drawData = {};
+        UIDrawList& drawList = drawData.EmplaceDrawList("PanelFrameBasic");
+        drawList.AddFilledRect(UIRect(0.0f, 0.0f, width, height), kWindowBg);
+
+        DrawCard(
+            drawList,
+            introRect,
+            "测试功能：PanelFrame 基础壳层",
+            "重点检查：Header / Body / Footer 布局，Active / Focus 边框，Pin / Close 命中。");
+        drawList.AddText(
+            UIPoint(introRect.x + 16.0f, introRect.y + 66.0f),
+            "操作：移动鼠标观察 hover；点 Header 切 Active；点 Body/Footer 取 Focus；点 Pin/Close 看 Result；按 F12 截图。",
+            kTextMuted,
+            12.0f);
+        drawList.AddText(
+            UIPoint(introRect.x + 16.0f, introRect.y + 90.0f),
+            "这个场景只验证 Editor 基础层 PanelFrame，不包含任何业务面板。",
+            kTextWeak,
+            12.0f);
+
+        DrawCard(drawList, controlsRect, "开关", "这里只保留基础状态开关，避免试验面板过杂。");
+        for (const ButtonState& button : m_buttons) {
+            DrawButton(drawList, button);
+        }
+
+        DrawCard(drawList, stateRect, "状态", "右侧面板的命中结果和状态变化会同步显示在这里。");
+        drawList.AddText(
+            UIPoint(stateRect.x + 16.0f, stateRect.y + 66.0f),
+            "Hover: " + DescribePart(m_hoveredPart),
+            kTextPrimary,
+            13.0f);
+        drawList.AddText(
+            UIPoint(stateRect.x + 16.0f, stateRect.y + 92.0f),
+            std::string("Active: ") + (m_state.active ? "On" : "Off"),
+            kTextPrimary,
+            13.0f);
+        drawList.AddText(
+            UIPoint(stateRect.x + 16.0f, stateRect.y + 118.0f),
+            std::string("Focused: ") + (m_state.focused ? "On" : "Off"),
+            kTextPrimary,
+            13.0f);
+        drawList.AddText(
+            UIPoint(stateRect.x + 16.0f, stateRect.y + 144.0f),
+            std::string("Pinned: ") + (m_state.pinned ? "On" : "Off"),
+            kTextPrimary,
+            13.0f);
+        drawList.AddText(
+            UIPoint(stateRect.x + 16.0f, stateRect.y + 170.0f),
+            "Result: " + m_lastResult,
+            kTextMuted,
+            12.0f);
+
+        UIEditorPanelFrameState frameState = m_state;
+        frameState.hovered = m_hoveredPart != UIEditorPanelFrameHitTarget::None;
+        frameState.pinHovered = m_hoveredPart == UIEditorPanelFrameHitTarget::PinButton;
+        frameState.closeHovered = m_hoveredPart == UIEditorPanelFrameHitTarget::CloseButton;
+        m_layout = BuildUIEditorPanelFrameLayout(panelRect, frameState);
+
+        AppendUIEditorPanelFrameBackground(drawList, m_layout, frameState);
+        AppendUIEditorPanelFrameForeground(
+            drawList,
+            m_layout,
+            frameState,
+            UIEditorPanelFrameText{
+                "Inspector Placeholder",
+                "PanelFrame foundation validation",
+                m_state.showFooter
+                    ? "Footer visible | Active=" + std::string(m_state.active ? "On" : "Off")
+                    : ""
+            });
+
+        drawList.AddText(
+            UIPoint(m_layout.bodyRect.x, m_layout.bodyRect.y),
+            "Body content placeholder",
+            kTextPrimary,
+            15.0f);
+        drawList.AddText(
+            UIPoint(m_layout.bodyRect.x, m_layout.bodyRect.y + 28.0f),
+            "Hover current region: " + DescribePart(m_hoveredPart),
+            kTextMuted,
+            12.0f);
+        drawList.AddText(
+            UIPoint(m_layout.bodyRect.x, m_layout.bodyRect.y + 50.0f),
+            "Pin button and Close button use PanelFrame hit rects.",
+            kTextMuted,
+            12.0f);
+        drawList.AddText(
+            UIPoint(m_layout.bodyRect.x, m_layout.bodyRect.y + 72.0f),
+            "Close does not destroy the panel here. It only verifies dispatch intent.",
+            kTextWeak,
+            12.0f);
+
+        const bool framePresented = m_renderer.Render(drawData);
+        m_autoScreenshot.CaptureIfRequested(
+            m_renderer,
+            drawData,
+            static_cast<unsigned int>(width),
+            static_cast<unsigned int>(height),
+            framePresented);
+    }
+
+    HWND m_hwnd = nullptr;
+    ATOM m_windowClassAtom = 0;
+    NativeRenderer m_renderer = {};
+    AutoScreenshotController m_autoScreenshot = {};
+    std::filesystem::path m_captureRoot = {};
+    std::vector<ButtonState> m_buttons = {};
+    UIPoint m_mousePosition = UIPoint(-1000.0f, -1000.0f);
+    UIEditorPanelFrameState m_state = {};
+    UIEditorPanelFrameLayout m_layout = {};
+    UIEditorPanelFrameHitTarget m_hoveredPart = UIEditorPanelFrameHitTarget::None;
+    std::string m_lastResult = {};
+    int m_closeDispatchCount = 0;
+};
+
+} // namespace
+
+int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE, LPWSTR, int nCmdShow) {
+    return ScenarioApp().Run(hInstance, nCmdShow);
+}

tests/UI/Editor/integration/shell/tab_strip_basic/CMakeLists.txt

@@ -0,0 +1,30 @@
+add_executable(editor_ui_tab_strip_basic_validation WIN32
+    main.cpp
+)
+
+target_include_directories(editor_ui_tab_strip_basic_validation PRIVATE
+    ${CMAKE_SOURCE_DIR}/new_editor/include
+    ${CMAKE_SOURCE_DIR}/new_editor/app
+    ${CMAKE_SOURCE_DIR}/engine/include
+)
+
+target_compile_definitions(editor_ui_tab_strip_basic_validation PRIVATE
+    UNICODE
+    _UNICODE
+    XCENGINE_EDITOR_UI_TESTS_REPO_ROOT="${XCENGINE_EDITOR_UI_TESTS_REPO_ROOT_PATH}"
+)
+
+if(MSVC)
+    target_compile_options(editor_ui_tab_strip_basic_validation PRIVATE /utf-8 /FS)
+    set_property(TARGET editor_ui_tab_strip_basic_validation PROPERTY
+        MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL")
+endif()
+
+target_link_libraries(editor_ui_tab_strip_basic_validation PRIVATE
+    XCUIEditorLib
+    XCUIEditorHost
+)
+
+set_target_properties(editor_ui_tab_strip_basic_validation PROPERTIES
+    OUTPUT_NAME "XCUIEditorTabStripBasicValidation"
+)

tests/UI/Editor/integration/shell/tab_strip_basic/main.cpp

@@ -0,0 +1,740 @@
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+
+#include <XCEditor/Core/UIEditorPanelRegistry.h>
+#include <XCEditor/Core/UIEditorWorkspaceController.h>
+#include <XCEditor/Widgets/UIEditorTabStrip.h>
+#include "Host/AutoScreenshot.h"
+#include "Host/NativeRenderer.h"
+
+#include <XCEngine/UI/DrawData.h>
+#include <XCEngine/UI/Widgets/UITabStripModel.h>
+
+#include <windows.h>
+#include <windowsx.h>
+
+#include <algorithm>
+#include <filesystem>
+#include <sstream>
+#include <string>
+#include <string_view>
+#include <vector>
+
+#ifndef XCENGINE_EDITOR_UI_TESTS_REPO_ROOT
+#define XCENGINE_EDITOR_UI_TESTS_REPO_ROOT "."
+#endif
+
+namespace {
+
+using XCEngine::UI::UIColor;
+using XCEngine::UI::UIDrawData;
+using XCEngine::UI::UIDrawList;
+using XCEngine::UI::UIPoint;
+using XCEngine::UI::UIRect;
+using XCEngine::UI::Widgets::UITabStripModel;
+using XCEngine::UI::Editor::BuildDefaultUIEditorWorkspaceController;
+using XCEngine::UI::Editor::BuildUIEditorWorkspacePanel;
+using XCEngine::UI::Editor::BuildUIEditorWorkspaceTabStack;
+using XCEngine::UI::Editor::FindUIEditorPanelDescriptor;
+using XCEngine::UI::Editor::FindUIEditorPanelSessionState;
+using XCEngine::UI::Editor::GetUIEditorWorkspaceCommandStatusName;
+using XCEngine::UI::Editor::Host::AutoScreenshotController;
+using XCEngine::UI::Editor::Host::NativeRenderer;
+using XCEngine::UI::Editor::UIEditorPanelDescriptor;
+using XCEngine::UI::Editor::UIEditorPanelRegistry;
+using XCEngine::UI::Editor::UIEditorWorkspaceCommand;
+using XCEngine::UI::Editor::UIEditorWorkspaceCommandKind;
+using XCEngine::UI::Editor::UIEditorWorkspaceCommandResult;
+using XCEngine::UI::Editor::UIEditorWorkspaceController;
+using XCEngine::UI::Editor::UIEditorWorkspaceModel;
+using XCEngine::UI::Editor::UIEditorWorkspaceNode;
+using XCEngine::UI::Editor::UIEditorWorkspaceNodeKind;
+using XCEngine::UI::Editor::Widgets::AppendUIEditorTabStripBackground;
+using XCEngine::UI::Editor::Widgets::AppendUIEditorTabStripForeground;
+using XCEngine::UI::Editor::Widgets::BuildUIEditorTabStripLayout;
+using XCEngine::UI::Editor::Widgets::HitTestUIEditorTabStrip;
+using XCEngine::UI::Editor::Widgets::ResolveUIEditorTabStripSelectedIndex;
+using XCEngine::UI::Editor::Widgets::UIEditorTabStripHitTarget;
+using XCEngine::UI::Editor::Widgets::UIEditorTabStripHitTargetKind;
+using XCEngine::UI::Editor::Widgets::UIEditorTabStripInvalidIndex;
+using XCEngine::UI::Editor::Widgets::UIEditorTabStripItem;
+using XCEngine::UI::Editor::Widgets::UIEditorTabStripLayout;
+using XCEngine::UI::Editor::Widgets::UIEditorTabStripState;
+
+constexpr const wchar_t* kWindowClassName = L"XCUIEditorTabStripBasicValidation";
+constexpr const wchar_t* kWindowTitle = L"XCUI Editor | TabStrip Basic";
+
+constexpr UIColor kWindowBg(0.15f, 0.15f, 0.15f, 1.0f);
+constexpr UIColor kCardBg(0.19f, 0.19f, 0.19f, 1.0f);
+constexpr UIColor kCardBorder(0.30f, 0.30f, 0.30f, 1.0f);
+constexpr UIColor kTextPrimary(0.94f, 0.94f, 0.94f, 1.0f);
+constexpr UIColor kTextMuted(0.73f, 0.73f, 0.73f, 1.0f);
+constexpr UIColor kTextWeak(0.58f, 0.58f, 0.58f, 1.0f);
+constexpr UIColor kSuccess(0.62f, 0.74f, 0.62f, 1.0f);
+constexpr UIColor kWarning(0.78f, 0.70f, 0.46f, 1.0f);
+constexpr UIColor kDanger(0.82f, 0.48f, 0.48f, 1.0f);
+constexpr UIColor kButtonBg(0.25f, 0.25f, 0.25f, 1.0f);
+constexpr UIColor kButtonHoveredBg(0.31f, 0.31f, 0.31f, 1.0f);
+
+std::filesystem::path ResolveRepoRootPath() {
+    std::string root = XCENGINE_EDITOR_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();
+}
+
+bool ContainsPoint(const UIRect& rect, float x, float y) {
+    return x >= rect.x &&
+        x <= rect.x + rect.width &&
+        y >= rect.y &&
+        y <= rect.y + rect.height;
+}
+
+void DrawCard(
+    UIDrawList& drawList,
+    const UIRect& rect,
+    std::string_view title,
+    std::string_view subtitle = {}) {
+    drawList.AddFilledRect(rect, kCardBg, 10.0f);
+    drawList.AddRectOutline(rect, kCardBorder, 1.0f, 10.0f);
+    drawList.AddText(UIPoint(rect.x + 16.0f, rect.y + 14.0f), std::string(title), kTextPrimary, 17.0f);
+    if (!subtitle.empty()) {
+        drawList.AddText(UIPoint(rect.x + 16.0f, rect.y + 40.0f), std::string(subtitle), kTextMuted, 12.0f);
+    }
+}
+
+void DrawButton(
+    UIDrawList& drawList,
+    const UIRect& rect,
+    std::string_view label,
+    bool hovered) {
+    drawList.AddFilledRect(rect, hovered ? kButtonHoveredBg : kButtonBg, 8.0f);
+    drawList.AddRectOutline(rect, kCardBorder, 1.0f, 8.0f);
+    drawList.AddText(UIPoint(rect.x + 14.0f, rect.y + 11.0f), std::string(label), kTextPrimary, 13.0f);
+}
+
+UIEditorPanelRegistry BuildPanelRegistry() {
+    UIEditorPanelRegistry registry = {};
+    registry.panels = {
+        { "doc-a", "Document A", {}, true, true, true },
+        { "doc-b", "Document B", {}, true, true, true },
+        { "doc-c", "Document C", {}, true, true, false }
+    };
+    return registry;
+}
+
+UIEditorWorkspaceModel BuildWorkspace() {
+    UIEditorWorkspaceModel workspace = {};
+    workspace.root = BuildUIEditorWorkspaceTabStack(
+        "document-tabs",
+        {
+            BuildUIEditorWorkspacePanel("doc-a-node", "doc-a", "Document A", true),
+            BuildUIEditorWorkspacePanel("doc-b-node", "doc-b", "Document B", true),
+            BuildUIEditorWorkspacePanel("doc-c-node", "doc-c", "Document C", true)
+        },
+        0u);
+    workspace.activePanelId = "doc-a";
+    return workspace;
+}
+
+const UIEditorWorkspaceNode* GetRootTabStack(const UIEditorWorkspaceModel& workspace) {
+    return workspace.root.kind == UIEditorWorkspaceNodeKind::TabStack ? &workspace.root : nullptr;
+}
+
+std::string DescribeHitTarget(
+    const UIEditorTabStripHitTarget& target,
+    const std::vector<UIEditorTabStripItem>& items) {
+    switch (target.kind) {
+    case UIEditorTabStripHitTargetKind::HeaderBackground:
+        return "HeaderBackground";
+    case UIEditorTabStripHitTargetKind::Content:
+        return "Content";
+    case UIEditorTabStripHitTargetKind::Tab:
+        if (target.index < items.size()) {
+            return "Tab: " + items[target.index].title;
+        }
+        return "Tab";
+    case UIEditorTabStripHitTargetKind::CloseButton:
+        if (target.index < items.size()) {
+            return "CloseButton: " + items[target.index].title;
+        }
+        return "CloseButton";
+    case UIEditorTabStripHitTargetKind::None:
+    default:
+        return "None";
+    }
+}
+
+std::string JoinTabTitles(const std::vector<UIEditorTabStripItem>& items) {
+    if (items.empty()) {
+        return "(none)";
+    }
+
+    std::ostringstream stream;
+    for (std::size_t index = 0; index < items.size(); ++index) {
+        if (index > 0u) {
+            stream << " | ";
+        }
+        stream << items[index].title;
+        if (!items[index].closable) {
+            stream << " (locked)";
+        }
+    }
+    return stream.str();
+}
+
+class ScenarioApp {
+public:
+    int 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);
+    }
+
+private:
+    static LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {
+        if (message == WM_NCCREATE) {
+            const auto* createStruct = reinterpret_cast<CREATESTRUCTW*>(lParam);
+            auto* app = reinterpret_cast<ScenarioApp*>(createStruct->lpCreateParams);
+            SetWindowLongPtrW(hwnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(app));
+            return TRUE;
+        }
+
+        auto* app = reinterpret_cast<ScenarioApp*>(GetWindowLongPtrW(hwnd, GWLP_USERDATA));
+        switch (message) {
+        case WM_SIZE:
+            if (app != nullptr && wParam != SIZE_MINIMIZED) {
+                app->OnResize(static_cast<UINT>(LOWORD(lParam)), static_cast<UINT>(HIWORD(lParam)));
+            }
+            return 0;
+        case WM_MOUSEMOVE:
+            if (app != nullptr) {
+                app->HandleMouseMove(
+                    static_cast<float>(GET_X_LPARAM(lParam)),
+                    static_cast<float>(GET_Y_LPARAM(lParam)));
+                return 0;
+            }
+            break;
+        case WM_MOUSELEAVE:
+            if (app != nullptr) {
+                app->HandleMouseLeave();
+                return 0;
+            }
+            break;
+        case WM_LBUTTONUP:
+            if (app != nullptr) {
+                app->HandleClick(
+                    static_cast<float>(GET_X_LPARAM(lParam)),
+                    static_cast<float>(GET_Y_LPARAM(lParam)));
+                return 0;
+            }
+            break;
+        case WM_KEYDOWN:
+        case WM_SYSKEYDOWN:
+            if (app != nullptr) {
+                if (wParam == VK_F12) {
+                    app->m_autoScreenshot.RequestCapture("manual_f12");
+                } else {
+                    app->HandleKeyDown(static_cast<UINT>(wParam));
+                }
+                return 0;
+            }
+            break;
+        case WM_PAINT:
+            if (app != nullptr) {
+                PAINTSTRUCT paintStruct = {};
+                BeginPaint(hwnd, &paintStruct);
+                app->RenderFrame();
+                EndPaint(hwnd, &paintStruct);
+                return 0;
+            }
+            break;
+        case WM_ERASEBKGND:
+            return 1;
+        case WM_DESTROY:
+            if (app != nullptr) {
+                app->m_hwnd = nullptr;
+            }
+            PostQuitMessage(0);
+            return 0;
+        default:
+            break;
+        }
+
+        return DefWindowProcW(hwnd, message, wParam, lParam);
+    }
+
+    bool Initialize(HINSTANCE hInstance, int nCmdShow) {
+        m_captureRoot =
+            ResolveRepoRootPath() / "tests/UI/Editor/integration/shell/tab_strip_basic/captures";
+        m_autoScreenshot.Initialize(m_captureRoot);
+
+        WNDCLASSEXW windowClass = {};
+        windowClass.cbSize = sizeof(windowClass);
+        windowClass.style = CS_HREDRAW | CS_VREDRAW;
+        windowClass.lpfnWndProc = &ScenarioApp::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,
+            920,
+            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;
+        }
+
+        ResetScenario();
+        return true;
+    }
+
+    void Shutdown() {
+        m_autoScreenshot.Shutdown();
+        m_renderer.Shutdown();
+
+        if (m_hwnd != nullptr && IsWindow(m_hwnd)) {
+            DestroyWindow(m_hwnd);
+        }
+        m_hwnd = nullptr;
+
+        if (m_windowClassAtom != 0) {
+            UnregisterClassW(kWindowClassName, GetModuleHandleW(nullptr));
+            m_windowClassAtom = 0;
+        }
+    }
+
+    void ResetScenario() {
+        m_controller =
+            BuildDefaultUIEditorWorkspaceController(BuildPanelRegistry(), BuildWorkspace());
+        m_tabStripState = {};
+        m_layout = {};
+        m_tabItems.clear();
+        m_hoverTarget = {};
+        m_mousePosition = UIPoint(-1000.0f, -1000.0f);
+        m_lastResult = "等待操作";
+        m_navigationModel = {};
+    }
+
+    void OnResize(UINT width, UINT height) {
+        if (width == 0u || height == 0u) {
+            return;
+        }
+
+        m_renderer.Resize(width, height);
+    }
+
+    void HandleMouseMove(float x, float y) {
+        m_mousePosition = UIPoint(x, y);
+        TRACKMOUSEEVENT event = {};
+        event.cbSize = sizeof(event);
+        event.dwFlags = TME_LEAVE;
+        event.hwndTrack = m_hwnd;
+        TrackMouseEvent(&event);
+
+        m_resetButtonHovered = ContainsPoint(m_resetButtonRect, x, y);
+        RefreshHoverTarget();
+        InvalidateRect(m_hwnd, nullptr, FALSE);
+    }
+
+    void HandleMouseLeave() {
+        m_mousePosition = UIPoint(-1000.0f, -1000.0f);
+        m_resetButtonHovered = false;
+        m_hoverTarget = {};
+        m_tabStripState.hoveredIndex = UIEditorTabStripInvalidIndex;
+        m_tabStripState.closeHoveredIndex = UIEditorTabStripInvalidIndex;
+        InvalidateRect(m_hwnd, nullptr, FALSE);
+    }
+
+    void HandleClick(float x, float y) {
+        if (ContainsPoint(m_resetButtonRect, x, y)) {
+            ResetScenario();
+            InvalidateRect(m_hwnd, nullptr, FALSE);
+            return;
+        }
+
+        const UIEditorTabStripHitTarget hit =
+            HitTestUIEditorTabStrip(m_layout, m_tabStripState, UIPoint(x, y));
+        switch (hit.kind) {
+        case UIEditorTabStripHitTargetKind::CloseButton:
+            if (hit.index < m_tabItems.size()) {
+                DispatchCommand(
+                    UIEditorWorkspaceCommandKind::ClosePanel,
+                    m_tabItems[hit.index].tabId,
+                    "Close " + m_tabItems[hit.index].title);
+                m_tabStripState.focused = true;
+            }
+            break;
+        case UIEditorTabStripHitTargetKind::Tab:
+            if (hit.index < m_tabItems.size()) {
+                DispatchCommand(
+                    UIEditorWorkspaceCommandKind::ActivatePanel,
+                    m_tabItems[hit.index].tabId,
+                    "Activate " + m_tabItems[hit.index].title);
+                m_tabStripState.focused = true;
+            }
+            break;
+        case UIEditorTabStripHitTargetKind::HeaderBackground:
+        case UIEditorTabStripHitTargetKind::Content:
+            m_tabStripState.focused = true;
+            m_lastResult = "TabStrip 获得 focus";
+            break;
+        case UIEditorTabStripHitTargetKind::None:
+        default:
+            m_tabStripState.focused = false;
+            m_lastResult = "Focus cleared";
+            break;
+        }
+
+        RefreshHoverTarget();
+        InvalidateRect(m_hwnd, nullptr, FALSE);
+    }
+
+    void HandleKeyDown(UINT keyCode) {
+        if (!m_tabStripState.focused) {
+            return;
+        }
+
+        RefreshTabItems();
+        bool handled = true;
+        bool changed = false;
+        std::string action = {};
+
+        switch (keyCode) {
+        case VK_LEFT:
+            action = "Keyboard Left";
+            changed = m_navigationModel.SelectPrevious();
+            break;
+        case VK_RIGHT:
+            action = "Keyboard Right";
+            changed = m_navigationModel.SelectNext();
+            break;
+        case VK_HOME:
+            action = "Keyboard Home";
+            changed = m_navigationModel.SelectFirst();
+            break;
+        case VK_END:
+            action = "Keyboard End";
+            changed = m_navigationModel.SelectLast();
+            break;
+        default:
+            handled = false;
+            break;
+        }
+
+        if (!handled) {
+            return;
+        }
+
+        if (!changed || !m_navigationModel.HasSelection()) {
+            m_lastResult = action + " -> NoOp";
+            InvalidateRect(m_hwnd, nullptr, FALSE);
+            return;
+        }
+
+        const std::size_t selectedIndex = m_navigationModel.GetSelectedIndex();
+        if (selectedIndex < m_tabItems.size()) {
+            DispatchCommand(
+                UIEditorWorkspaceCommandKind::ActivatePanel,
+                m_tabItems[selectedIndex].tabId,
+                action + " -> " + m_tabItems[selectedIndex].title);
+        }
+
+        InvalidateRect(m_hwnd, nullptr, FALSE);
+    }
+
+    void DispatchCommand(
+        UIEditorWorkspaceCommandKind kind,
+        std::string_view panelId,
+        std::string label) {
+        UIEditorWorkspaceCommand command = {};
+        command.kind = kind;
+        command.panelId = std::string(panelId);
+
+        const UIEditorWorkspaceCommandResult result = m_controller.Dispatch(command);
+        m_lastResult =
+            std::move(label) + " -> " +
+            std::string(GetUIEditorWorkspaceCommandStatusName(result.status)) +
+            " | " +
+            result.message;
+    }
+
+    void RefreshTabItems() {
+        const UIEditorWorkspaceModel& workspace = m_controller.GetWorkspace();
+        const UIEditorPanelRegistry& registry = m_controller.GetPanelRegistry();
+        const auto* tabStack = GetRootTabStack(workspace);
+
+        m_tabItems.clear();
+        if (tabStack != nullptr) {
+            for (const UIEditorWorkspaceNode& child : tabStack->children) {
+                if (child.kind != UIEditorWorkspaceNodeKind::Panel) {
+                    continue;
+                }
+
+                const auto* sessionState =
+                    FindUIEditorPanelSessionState(m_controller.GetSession(), child.panel.panelId);
+                if (sessionState == nullptr || !sessionState->open || !sessionState->visible) {
+                    continue;
+                }
+
+                const UIEditorPanelDescriptor* descriptor =
+                    FindUIEditorPanelDescriptor(registry, child.panel.panelId);
+                UIEditorTabStripItem item = {};
+                item.tabId = child.panel.panelId;
+                item.title = child.panel.title;
+                item.closable = descriptor != nullptr ? descriptor->canClose : true;
+                m_tabItems.push_back(std::move(item));
+            }
+        }
+
+        m_tabStripState.selectedIndex =
+            ResolveUIEditorTabStripSelectedIndex(m_tabItems, workspace.activePanelId);
+
+        m_navigationModel.SetItemCount(m_tabItems.size());
+        if (m_tabStripState.selectedIndex != UIEditorTabStripInvalidIndex) {
+            m_navigationModel.SetSelectedIndex(m_tabStripState.selectedIndex);
+        }
+    }
+
+    void RefreshHoverTarget() {
+        m_hoverTarget = HitTestUIEditorTabStrip(m_layout, m_tabStripState, m_mousePosition);
+        m_tabStripState.hoveredIndex = UIEditorTabStripInvalidIndex;
+        m_tabStripState.closeHoveredIndex = UIEditorTabStripInvalidIndex;
+
+        if (m_hoverTarget.kind == UIEditorTabStripHitTargetKind::CloseButton &&
+            m_hoverTarget.index < m_tabItems.size()) {
+            m_tabStripState.hoveredIndex = m_hoverTarget.index;
+            m_tabStripState.closeHoveredIndex = m_hoverTarget.index;
+            return;
+        }
+
+        if (m_hoverTarget.kind == UIEditorTabStripHitTargetKind::Tab &&
+            m_hoverTarget.index < m_tabItems.size()) {
+            m_tabStripState.hoveredIndex = m_hoverTarget.index;
+        }
+    }
+
+    void RenderFrame() {
+        RECT clientRect = {};
+        GetClientRect(m_hwnd, &clientRect);
+        const float width = static_cast<float>((std::max)(1L, clientRect.right - clientRect.left));
+        const float height = static_cast<float>((std::max)(1L, clientRect.bottom - clientRect.top));
+
+        const float outerPadding = 20.0f;
+        const float leftColumnWidth = 360.0f;
+        const UIRect introRect(outerPadding, outerPadding, leftColumnWidth, 176.0f);
+        const UIRect stateRect(outerPadding, 216.0f, leftColumnWidth, height - 236.0f);
+        const UIRect previewCardRect(
+            leftColumnWidth + outerPadding * 2.0f,
+            outerPadding,
+            width - leftColumnWidth - outerPadding * 3.0f,
+            height - outerPadding * 2.0f);
+        const UIRect tabStripRect(
+            previewCardRect.x + 20.0f,
+            previewCardRect.y + 20.0f,
+            previewCardRect.width - 40.0f,
+            previewCardRect.height - 40.0f);
+
+        RefreshTabItems();
+        m_layout = BuildUIEditorTabStripLayout(tabStripRect, m_tabItems, m_tabStripState);
+        RefreshHoverTarget();
+
+        m_resetButtonRect = UIRect(
+            stateRect.x + 16.0f,
+            stateRect.y + 194.0f,
+            stateRect.width - 32.0f,
+            38.0f);
+
+        UIDrawData drawData = {};
+        UIDrawList& drawList = drawData.EmplaceDrawList("EditorTabStripBasic");
+        drawList.AddFilledRect(UIRect(0.0f, 0.0f, width, height), kWindowBg);
+
+        DrawCard(
+            drawList,
+            introRect,
+            "测试功能：Editor TabStrip 基础层",
+            "只验证 TabStrip header / hit-test / selection / close / keyboard，不包含任何业务面板。");
+        drawList.AddText(
+            UIPoint(introRect.x + 16.0f, introRect.y + 68.0f),
+            "重点检查：tab 布局是否整齐；selected / hover / focus 是否正确；Close 后 active panel 是否回退正确。",
+            kTextPrimary,
+            12.0f);
+        drawList.AddText(
+            UIPoint(introRect.x + 16.0f, introRect.y + 92.0f),
+            "操作：点击 tab 切换；点击 X 关闭；Document C 没有 X；点击内容区后按 Left / Right / Home / End；Reset 恢复；F12 截图。",
+            kTextMuted,
+            12.0f);
+        drawList.AddText(
+            UIPoint(introRect.x + 16.0f, introRect.y + 116.0f),
+            "预期：Close 命中优先于 tab；键盘导航只在 focused 时生效；Document C 始终保留。",
+            kTextWeak,
+            12.0f);
+
+        DrawCard(
+            drawList,
+            stateRect,
+            "状态回显",
+            "这里直接回显 hover / focus / active panel / result，方便人工检查。");
+        DrawButton(drawList, m_resetButtonRect, "Reset", m_resetButtonHovered);
+
+        const std::size_t selectedIndex =
+            ResolveUIEditorTabStripSelectedIndex(m_tabItems, m_controller.GetWorkspace().activePanelId);
+        const std::string selectedIndexText =
+            selectedIndex == UIEditorTabStripInvalidIndex ? "(none)" : std::to_string(selectedIndex);
+        const auto validation = m_controller.ValidateState();
+
+        drawList.AddText(
+            UIPoint(stateRect.x + 16.0f, stateRect.y + 70.0f),
+            "Hover: " + DescribeHitTarget(m_hoverTarget, m_tabItems),
+            kTextPrimary,
+            13.0f);
+        drawList.AddText(
+            UIPoint(stateRect.x + 16.0f, stateRect.y + 96.0f),
+            std::string("Focused: ") + (m_tabStripState.focused ? "On" : "Off"),
+            kTextPrimary,
+            13.0f);
+        drawList.AddText(
+            UIPoint(stateRect.x + 16.0f, stateRect.y + 122.0f),
+            "Active Panel: " +
+                (m_controller.GetWorkspace().activePanelId.empty()
+                    ? std::string("(none)")
+                    : m_controller.GetWorkspace().activePanelId),
+            kTextPrimary,
+            13.0f);
+        drawList.AddText(
+            UIPoint(stateRect.x + 16.0f, stateRect.y + 148.0f),
+            "Selected Index: " + selectedIndexText,
+            kTextPrimary,
+            13.0f);
+        drawList.AddText(
+            UIPoint(stateRect.x + 16.0f, stateRect.y + 174.0f),
+            "Tabs: " + JoinTabTitles(m_tabItems),
+            kTextMuted,
+            12.0f);
+        drawList.AddText(
+            UIPoint(stateRect.x + 16.0f, stateRect.y + 250.0f),
+            "Result: " + m_lastResult,
+            kTextMuted,
+            12.0f);
+        drawList.AddText(
+            UIPoint(stateRect.x + 16.0f, stateRect.y + 276.0f),
+            validation.IsValid() ? "Validation: OK" : "Validation: " + validation.message,
+            validation.IsValid() ? kSuccess : kDanger,
+            12.0f);
+
+        const std::string captureSummary =
+            m_autoScreenshot.HasPendingCapture()
+                ? "截图排队中..."
+                : (m_autoScreenshot.GetLastCaptureSummary().empty()
+                    ? std::string("F12 -> tests/UI/Editor/integration/shell/tab_strip_basic/captures/")
+                    : m_autoScreenshot.GetLastCaptureSummary());
+        drawList.AddText(
+            UIPoint(stateRect.x + 16.0f, stateRect.y + 302.0f),
+            captureSummary,
+            kTextWeak,
+            12.0f);
+
+        DrawCard(
+            drawList,
+            previewCardRect,
+            "预览区",
+            "这里只放一个 TabStrip 和一个 content placeholder，避免试验面板过杂。");
+
+        AppendUIEditorTabStripBackground(drawList, m_layout, m_tabStripState);
+        AppendUIEditorTabStripForeground(drawList, m_layout, m_tabItems, m_tabStripState);
+
+        drawList.AddText(
+            UIPoint(m_layout.contentRect.x + 20.0f, m_layout.contentRect.y + 22.0f),
+            "Content Placeholder",
+            kTextPrimary,
+            18.0f);
+        drawList.AddText(
+            UIPoint(m_layout.contentRect.x + 20.0f, m_layout.contentRect.y + 52.0f),
+            "当前 active panel: " +
+                (m_controller.GetWorkspace().activePanelId.empty()
+                    ? std::string("(none)")
+                    : m_controller.GetWorkspace().activePanelId),
+            kTextMuted,
+            13.0f);
+        drawList.AddText(
+            UIPoint(m_layout.contentRect.x + 20.0f, m_layout.contentRect.y + 76.0f),
+            "这个区域只用于验证 TabStrip content frame 与 focus，不承载业务内容。",
+            kTextWeak,
+            12.0f);
+        drawList.AddText(
+            UIPoint(m_layout.contentRect.x + 20.0f, m_layout.contentRect.y + 100.0f),
+            "检查点：关闭 Document B 后，应自动回退到相邻 tab；Document C 无法关闭。",
+            kTextWeak,
+            12.0f);
+
+        const bool framePresented = m_renderer.Render(drawData);
+        m_autoScreenshot.CaptureIfRequested(
+            m_renderer,
+            drawData,
+            static_cast<unsigned int>(width),
+            static_cast<unsigned int>(height),
+            framePresented);
+    }
+
+    HWND m_hwnd = nullptr;
+    ATOM m_windowClassAtom = 0;
+    NativeRenderer m_renderer = {};
+    AutoScreenshotController m_autoScreenshot = {};
+    std::filesystem::path m_captureRoot = {};
+    UIPoint m_mousePosition = UIPoint(-1000.0f, -1000.0f);
+    UIEditorWorkspaceController m_controller = {};
+    UIEditorTabStripState m_tabStripState = {};
+    UIEditorTabStripLayout m_layout = {};
+    std::vector<UIEditorTabStripItem> m_tabItems = {};
+    UITabStripModel m_navigationModel = {};
+    UIEditorTabStripHitTarget m_hoverTarget = {};
+    UIRect m_resetButtonRect = {};
+    bool m_resetButtonHovered = false;
+    std::string m_lastResult = {};
+};
+
+} // namespace
+
+int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE, LPWSTR, int nCmdShow) {
+    return ScenarioApp().Run(hInstance, nCmdShow);
+}