fix: Fix bug that caused blocks inserted via Enter to not attach (#9699)

packages/blockly/core/block_svg.ts

@@ -1918,9 +1918,9 @@ export class BlockSvg
    * main workspace. If this block has a single full-block field, that field
    * will be focused. Otherwise, this is a no-op.
    */
-  performAction() {
+  performAction(e?: KeyboardEvent) {
     if (this.workspace.isFlyout) {
-      KeyboardMover.mover.startMove(this);
+      KeyboardMover.mover.startMove(this, e);
       return;
     } else if (this.isSimpleReporter()) {
       for (const input of this.inputList) {

packages/blockly/core/interfaces/i_focusable_node.ts

@@ -104,8 +104,10 @@ export interface IFocusableNode {
    * Optional method invoked when this node has focus and the user acts on it by
    * pressing Enter or Space. Behavior should generally be similar to the node
    * being clicked on.
+   *
+   * @param e The event that triggered this action, if any.
    */
-  performAction?(): void;
+  performAction?(e?: Event): void;
 }
 
 /**

packages/blockly/core/shortcut_items.ts

@@ -861,7 +861,7 @@ export function registerPerformAction() {
       const focusedNode = getFocusManager().getFocusedNode();
       if (focusedNode && 'performAction' in focusedNode) {
         e.preventDefault();
-        focusedNode.performAction?.();
+        focusedNode.performAction?.(e);
         return true;
       }
       return false;

packages/blockly/tests/mocha/shortcut_items_test.js

@@ -1037,6 +1037,10 @@ suite('Keyboard Shortcut Items', function () {
     });
 
     test('Inserts blocks from the flyout in move mode', function () {
+      const first = this.workspace.newBlock('stack_block');
+      first.initSvg();
+      first.render();
+
       this.workspace.getToolbox().selectItemByPosition(0);
       const block = this.workspace
         .getNavigator()
@@ -1053,6 +1057,12 @@ suite('Keyboard Shortcut Items', function () {
       assert.isTrue(movingBlock.isDragging());
       assert.isFalse(movingBlock.workspace.isFlyout);
 
+      const hasInsertionMarker = this.workspace
+        .getTopBlocks()
+        .flatMap((b) => b.getChildren())
+        .some((b) => b.isInsertionMarker());
+      assert.isTrue(hasInsertionMarker);
+
       Blockly.KeyboardMover.mover.abortMove();
     });