Add Area animation tests

[PavelVanecek]

Related Issue

#5914

[Copilot]

Pull Request Overview

This PR adds tests and utilities for area chart animations and integrates manual animation controls in Storybook.

• Introduces a shared expectAreaCurve helper for validating SVG path d attributes.
• Refactors AreaChart.spec.tsx to use the new helper and updates the expectDots signature for immutability.
• Enhances animation testing by adding isAnimating to the mock manager and wrapping Storybook examples with ManualAnimations.

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/helpers/expectAreaCurve.ts	New helper to assert area curve d attributes in tests
test/helper/expectDots.ts	Updated expectDots to accept ReadonlyArray<ExpectedDot>
test/chart/AreaChart.spec.ts[x]	Refactored to import expectAreaCurve and reordered imports
test/animation/MockAbstractAnimationManager.ts	Added isAnimating() method to mock animation manager
storybook/storybook-addon-recharts/ManualAnimations.tsx	Added inline styling to wrapper div for ResponsiveContainer
storybook/stories/Examples/AreaChart.stories.tsx	Wrapped story example in ManualAnimations for animation control

Comments suppressed due to low confidence (2)

test/helper/expectDots.ts:1

• [nitpick] The tests use both test/helper and test/helpers directories, which can be confusing. Consider unifying the folder name (singular or plural) for consistency.

export type ExpectedDot = {

test/animation/MockAbstractAnimationManager.ts:54

• The new isAnimating method isn't covered by any unit tests. Adding a test case for scenarios when the queue is empty vs. non-empty will help ensure its correctness.

  public isAnimating(): boolean {

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.23%. Comparing base (f93cf6d) to head (e396740).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5967      +/-   ##
==========================================
+ Coverage   96.07%   96.23%   +0.16%     
==========================================
  Files         194      194              
  Lines       19623    19623              
  Branches     4012     4020       +8     
==========================================
+ Hits        18853    18885      +32     
+ Misses        764      732      -32     
  Partials        6        6              

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