#### PR Dependency Tree
* **PR #13464**
* **PR #13465** 👈
* **PR #13471**
* **PR #13472**
* **PR #13473**
This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Improved stacking order across canvas elements (shapes, connectors,
brush, highlighter), reducing unexpected overlap.
* Corrected z-index application for placeholders and fully rendered
elements to ensure consistent layering during edits.
* **Refactor**
* Centralized z-index handling for canvas elements to provide
predictable, uniform layering behavior across the app.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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 -->
L-Sun