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/framework/std/src/gfx/interactivity/gfx-view-event-handler.ts

@@ -66,7 +66,29 @@ export class GfxViewEventManager {
       .search(new Bound(x - 5, y - 5, 10, 10), {
         filter: ['canvas', 'local'],
       })
-      .map(model => this.gfx.view.get(model)) as GfxElementModelView[];
+      .reduce((pre, model) => {
+        if (
+          model.includesPoint(
+            x,
+            y,
+            {
+              hitThreshold: 10,
+              responsePadding: [5, 5],
+            },
+            this.gfx.std.host
+          ) ||
+          ('externalBound' in model
+            ? model.externalBound?.isPointInBound([x, y])
+            : false)
+        ) {
+          const view = this.gfx.view.get(model) as GfxElementModelView | null;
+
+          view && pre.push(view);
+        }
+
+        return pre;
+      }, [] as GfxElementModelView[]);
+
     const currentStackedViews = new Set(this._hoveredElementsStack);
     const visited = new Set<GfxElementModelView>();