fix(editor): edgeless selected rect should be below the edgeless toolbar (#12370)

Close [BS-3512](https://linear.app/affine-design/issue/BS-3512/bug-note-选中状态会穿透-toolbar)

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

- **Tests**
  - Added a new end-to-end test to verify that selection handles are visually and interactively layered beneath the edgeless element toolbar in the editor.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/all/src/extensions/view.ts

@@ -102,9 +102,9 @@ export function getInternalViewExtensions() {
     InlinePresetViewExtension,
 
     // Widget
+    // order will affect the z-index of the widget
     DragHandleViewExtension,
     EdgelessAutoConnectViewExtension,
-    EdgelessToolbarViewExtension,
     FrameTitleViewExtension,
     KeyboardToolbarViewExtension,
     LinkedDocViewExtension,
@@ -118,6 +118,7 @@ export function getInternalViewExtensions() {
     EdgelessSelectedRectViewExtension,
     EdgelessDraggingAreaViewExtension,
     NoteSlicerViewExtension,
+    EdgelessToolbarViewExtension,
 
     // Fragment
     DocTitleViewExtension,