fix: get wrong anchor when a node is invisible

[leondt1]

#4264
显示隐藏的节点后，边的锚点位置计算错误

Description

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Enhancement (changes that improvement of current feature or performance)
• Refactoring (changes that neither fixes a bug nor adds a feature)
• Test Case (changes that add missing tests or correct existing tests)
• Code style optimization (changes that do not affect the meaning of the code)
• Docs (changes that only update documentation)
• Chore (changes that don't modify src or test files)

Self Check before Merge

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[x6-bot]

👋 @leondt1

💖 Thanks for opening this pull request! 💖

Please follow the contributing guidelines. And we use semantic commit messages to streamline the release process.

Examples of commit messages with semantic prefixes:

• fix: don't overwrite prevent_default if default wasn't prevented
• feat: add graph.scale() method
• docs: graph.getShortestPath is now available

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We get a lot of pull requests on this repo, so please be patient and we will get back to you as soon as we can.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 10 lines in your changes are missing coverage. Please review.

Project coverage is 10.35%. Comparing base (0bbff8f) to head (b4a353d).
Report is 7 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4313   +/-   ##
=======================================
  Coverage   10.35%   10.35%           
=======================================
  Files         180      180           
  Lines       10578    10578           
  Branches     2577     2577           
=======================================
  Hits         1095     1095           
  Misses       9394     9394           
  Partials       89       89           

Flag	Coverage Δ
x6	10.35% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...ackages/x6/src/registry/node-anchor/middle-side.ts	8.10% <0.00%> (ø)
packages/x6/src/registry/node-anchor/orth.ts	16.00% <0.00%> (ø)
packages/x6/src/registry/node-anchor/bbox.ts	58.82% <0.00%> (ø)

[x6-bot]

👋 @leondt1

Congrats on merging your first pull request! 🎉🎉🎉