f2 Legend click bug, click legend render position can't trigger click event

- [ ] I have searched the [issues](https://github.com/antvis/f2/issues) of this repository and believe that this is not a duplicate.

### Reproduction link
[https://github.com/CAI-JIEMING/f2-bug-demo](https://github.com/CAI-JIEMING/f2-bug-demo)

### Steps to reproduce
When there is content above the chart, it will cause the position where the legend triggers the click event to deviate from the rendered legend position

Details can be found in the repository: https://github.com/CAI-JIEMING/f2-bug-demo

| Environment | Info |
|---|---|
| f2 | 4.0.43 |
| System | - |
| Browser | - |

Start with the reproduction link and compare the rendered legend position with the position used for click handling when content appears above the chart. Trace the F2 legend interaction and coordinate-handling entry points, then verify that clicks on the displayed legend trigger the expected event in the reproduction.

Written by the indexing model from the issue text.