Fix lineseries remove last 2040

[beto-rodriguez]

Ensures line series removes points on points disposing

• fixes Chart Display Distortion & Control Crash in .NET 10 with LiveChartsCore.SkiaSharpView.WPF #2074
• fixes Ghost points / overshoot when setting ISeries.Values with fewer values #2040
• fixes Plot is not redrawing. #2025
• fixes WPF CartesianChart ObservablePoint Error #2014

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[Copilot]

Pull request overview

This pull request fixes issue #2040 where LineSeries displays "ghost points" or artifacts when the Values collection is updated with fewer points than the previous dataset. The problem occurred because old Bezier segment control points remained in the path collections after points were removed.

Changes:

• Adds explicit removal of segments from stroke and fill path collections when disposing points in LineSeries
• Adds comprehensive test coverage to validate bezier scaling behavior when points are added, removed, or inserted

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 5 comments.

File	Description
src/LiveChartsCore/CoreLineSeries.cs	Adds segment cleanup logic to SoftDeleteOrDisposePoint method to remove disposed point segments from stroke and fill path collections
tests/CoreTests/SeriesTests/LineSeriesTest.cs	Adds new test ShouldScaleBeziersOnAddRemoveOrInsert to validate straight line rendering after various point manipulations; removes unused imports

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Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

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Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

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