fix(editor): toc viewer no update after delete heading in edgeless mode (#12411)

Close [BS-3494](https://linear.app/affine-design/issue/BS-3494/在白板删除note的标题，切回page模式，toc没更新)

Other changes: `doc` -> `store`

### Before

https://github.com/user-attachments/assets/ddce20b9-eda2-414b-9452-d8d54a811cf1

### After

https://github.com/user-attachments/assets/7124b8a1-9ab4-4e09-b0ff-7ea2cc9613c2

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

- **Bug Fixes**
  - Improved synchronization of the outline viewer to ensure updates after editing headings in edgeless mode.
- **Tests**
  - Added an end-to-end test verifying that the outline viewer correctly reflects changes made in edgeless mode.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

tests/affine-local/e2e/blocksuite/outline/outline-viewer.spec.ts

@@ -179,6 +179,25 @@ test('should hide edgeless-only note headings', async ({ page }) => {
   await expect(h1InPanel).toContainText(['Heading 1']);
 });
 
+test('outline viewer should update after change heading in edgeless mode', async ({
+  page,
+}) => {
+  await createTitle(page);
+  await pressEnter(page);
+
+  await type(page, '# ');
+  await type(page, 'Heading 1');
+
+  await clickEdgelessModeButton(page);
+  const note = page.locator('affine-edgeless-note');
+  await note.dblclick();
+  await type(page, '# New Heading');
+  await clickPageModeButton(page);
+
+  const indicators = getIndicators(page);
+  await expect(indicators).toHaveCount(3);
+});
+
 test('outline viewer should be useable in doc peek preview', async ({
   page,
 }) => {