Refine XCEditor docking and DPI rendering

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

@@ -196,11 +196,6 @@ std::string DescribeHitTarget(
             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";
@@ -218,9 +213,6 @@ std::string JoinTabTitles(const std::vector<UIEditorTabStripItem>& items) {
             stream << " | ";
         }
         stream << items[index].title;
-        if (!items[index].closable) {
-            stream << " (locked)";
-        }
     }
     return stream.str();
 }
@@ -502,15 +494,6 @@ private:
     void ApplyInteractionResult(
         const UIEditorTabStripInteractionResult& result,
         std::string_view source) {
-        if (result.closeRequested && !result.closedTabId.empty()) {
-            DispatchCommand(
-                UIEditorWorkspaceCommandKind::ClosePanel,
-                result.closedTabId,
-                std::string(source) + " Close -> " + result.closedTabId);
-            PumpTabStripEvents({});
-            return;
-        }
-
         if ((result.selectionChanged || result.keyboardNavigated) &&
             !result.selectedTabId.empty()) {
             DispatchCommand(
@@ -609,7 +592,7 @@ private:
             drawList,
             introRect,
             "这个测试验证什么功能？",
-            "验证 TabStrip 的 header 命中、选中切换、关闭请求和键盘导航，不接业务面板。");
+            "验证 TabStrip 的 header 命中、选中切换和键盘导航，不接业务面板。");
         drawList.AddText(
             UIPoint(introRect.x + 16.0f, introRect.y + 68.0f),
             "1. 点击 tab，检查 selected / active panel 是否同步。",
@@ -617,7 +600,7 @@ private:
             12.0f);
         drawList.AddText(
             UIPoint(introRect.x + 16.0f, introRect.y + 92.0f),
-            "2. 点击 X，只验证关闭请求；Document C 没有关闭按钮。",
+            "2. 所有 tab 都没有关闭按钮；这里只验证命中、focus 和选中同步。",
             kTextMuted,
             12.0f);
         drawList.AddText(
@@ -719,7 +702,7 @@ private:
             12.0f);
         drawList.AddText(
             UIPoint(m_layout.contentRect.x + 20.0f, m_layout.contentRect.y + 100.0f),
-            "可点击 Document B 切换，或点击 Document C 验证不可关闭 tab。",
+            "可点击 Document B 切换，再用 Left / Right / Home / End 验证键盘导航。",
             kTextWeak,
             12.0f);