fix(editor): ci stability (#14704)

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

* **Chores**
* Improved Electron shutdown, diagnostics and tab teardown for more
reliable exits and forced cleanup on stubborn processes.
* **Tests**
* Added polling-based test helpers, stronger scroll/page readiness,
timeout-tolerant page selection, and async cleanup/worker teardown;
updated many tests to wait for UI/model updates and rendering frames.
* **Bug Fixes**
* Reduced flakiness by awaiting paragraph visibility, nested counts,
selection/navigation stability, tab counts, post-action renders, and
safer element interactions.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

tests/blocksuite/e2e/utils/actions/edgeless.ts

@@ -376,13 +376,28 @@ export async function setEdgelessTool(
         'shape',
         false
       );
-      // Avoid clicking on the shape-element (will trigger dragging mode)
-      await shapeToolButton.click({ position: { x: 5, y: 5 } });
+      const shapeToolBox = await shapeToolButton.boundingBox();
+      if (!shapeToolBox) {
+        throw new Error('shapeToolBox is not found');
+      }
 
-      const squareShapeButton = page
-        .locator('edgeless-slide-menu edgeless-tool-icon-button')
+      await page.mouse.click(shapeToolBox.x + 2, shapeToolBox.y + 2);
+
+      const shapeMenu = page.locator('edgeless-shape-menu');
+      await expect(shapeMenu).toBeVisible();
+
+      const squareShapeButton = shapeMenu
+        .locator('edgeless-tool-icon-button')
         .filter({ hasText: shape });
-      await squareShapeButton.click();
+      await expect(squareShapeButton).toBeVisible();
+      const squareShapeBox = await squareShapeButton.boundingBox();
+      if (!squareShapeBox) {
+        throw new Error('squareShapeBox is not found');
+      }
+      await page.mouse.click(
+        squareShapeBox.x + squareShapeBox.width / 2,
+        squareShapeBox.y + squareShapeBox.height / 2
+      );
       break;
     }
   }