Build XCEditor editor shell compose foundation

tests/UI/Editor/integration/README.md

@@ -15,6 +15,7 @@ Layout:
 - `menu`, `workspace`, and `viewport` in scenario names describe contract families, not extra directory levels.
 - `shared/`: shared host wrapper, scenario registry, shared theme
 - `shell/workspace_shell_compose/`: split/tab/panel shell compose only
+- `shell/editor_shell_compose/`: editor root shell compose only
 - `shell/menu_bar_basic/`: menu bar open/close/hover/dispatch only
 - `shell/context_menu_basic/`: context menu root/submenu/dismiss/dispatch only
 - `shell/panel_frame_basic/`: panel frame layout/state/hit-test only
@@ -35,6 +36,11 @@ Scenarios:
   Executable: `XCUIEditorWorkspaceShellComposeValidation.exe`
   Scope: DockHost compose, splitter drag, tab host, panel frame placeholders, workspace active-panel sync
 
+- `editor.shell.editor_shell_compose`
+  Build target: `editor_ui_editor_shell_compose_validation`
+  Executable: `XCUIEditorShellComposeValidation.exe`
+  Scope: root shell compose only; MenuBar / WorkspaceCompose / StatusBar three-band layout and workspace body embedding
+
 - `editor.shell.menu_bar_basic`
   Build target: `editor_ui_menu_bar_basic_validation`
   Executable: `XCUIEditorMenuBarBasicValidation.exe`
@@ -111,6 +117,9 @@ Selected controls:
 - `shell/workspace_shell_compose/`
   Drag splitters, switch `Document A/B/C`, close tabs or side panels, press `Reset`, press `F12`.
 
+- `shell/editor_shell_compose/`
+  Click `切到 Scene / 切到 Document`, toggle `TopBar / BottomBar / Texture`, inspect `MenuBar Rect / Workspace Rect / StatusBar Rect / Selected Presentation / Request Size`, press `Reset`, press `截图` or `F12`.
+
 - `shell/menu_bar_basic/`
   Click `File / Window / Layout`, move the mouse across menu items, click outside the menu or press `Esc`, press `F12`.