fix: connector label editing (#12282)

Fixes [BS-3373](https://linear.app/affine-design/issue/BS-3373/connector%E7%9A%84%E5%8F%8C%E5%87%BB%E6%B7%BB%E5%8A%A0note%E8%A1%8C%E4%B8%BA%E5%8F%97%E5%88%B0%E4%BA%86%E8%A6%86%E7%9B%96%E8%8C%83%E5%9B%B4%E7%9A%84%E5%BD%B1%E5%93%8D)

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

- **New Features**
  - Connector label elements now include identity and creator metadata.

- **Bug Fixes**
  - Improved hit-testing for pointer interactions, resulting in more accurate detection of hovered elements.

- **Refactor**
  - Enhanced internal comparison logic for elements, improving sorting and ordering consistency.
  - Strengthened type definitions for search filters, improving result accuracy and clarity.

- **Tests**
  - Added end-to-end tests to verify correct label entry and retrieval for multiple connectors.
  - Introduced utility functions to fetch connector labels and improved connector creation in test actions.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/gfx/connector/src/view/view.ts

@@ -142,6 +142,8 @@ export class ConnectorElementView extends GfxElementModelView<ConnectorElementMo
       if (!curLabelElement) {
         curLabelElement = labelElement;
 
+        labelElement.id = `#${this.model.id}-label`;
+        labelElement.creator = this.model;
         labelElement.fillColor = 'transparent';
         labelElement.strokeColor = 'transparent';
         labelElement.strokeWidth = 0;