fix(parallel): preserve areaSelectStyle on persisted selection

[Justin-ZS]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

Preserve parallelAxis.areaSelectStyle when persisted parallel-axis selections are rebuilt.

Fixed issues

• [Bug] Parallel axis persisted selection ignores configured areaSelectedStyle #21583: Parallel axis persisted selection ignores configured areaSelectStyle.

Details

Before: What was the problem?

ParallelAxisView uses areaSelectStyle when creating a new axis selection, but the persisted covers are later rebuilt through BrushController.updateCovers without carrying over the active brush style. That rebuild path fell back to DEFAULT_BRUSH_OPT, so the selected area eventually changed back to the controller fallback style instead of respecting the configured style.

After: How does it behave after the fixing?

BrushController.updateCovers now inherits from the currently enabled brush option before falling back to DEFAULT_BRUSH_OPT, so rebuilt covers keep the same brushStyle, transformable, and removeOnClick settings as the active controller. A regression test was added to lock this behavior in.

Document Info

One of the following should be checked.

• This PR doesn't relate to document changes
• The document should be updated later
• The document changes have been made in apache/echarts-doc#xxx

Misc

Security Checking

• This PR uses security-sensitive Web APIs.

ZRender Changes

• This PR depends on ZRender changes (ecomfe/zrender#xxx).

Related test cases or examples to use the new APIs

• npx jest --config test/ut/jest.config.cjs --coverage=false test/ut/spec/component/helper/BrushController.test.ts --runInBand
• npm run checktype
• npx eslint src/component/helper/BrushController.ts

Merging options

• Please squash the commits into a single one when merging.

Other information

N.A.

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The changes brought by this PR can be previewed at: https://echarts.apache.org/examples/editor?version=PR-21590@0c0f466