[01725] Add YAxisIndex to Scatter chart

[nielsbosma]

Summary

Changes

Added YAxisIndex property to the Scatter record and its corresponding extension method, plus updated the frontend ScatterProps interface and generateScatterSeries function to pass yAxisIndex to ECharts. This completes dual-axis support across all cartesian chart series types (Line, Area, Bar, and now Scatter).

API Changes

• Added Scatter.YAxisIndex property (int?, default null) in Ivy namespace
• Added ScatterExtensions.YAxisIndex(this Scatter, int) extension method
• Added yAxisIndex field to ScatterProps TypeScript interface

Files Modified

• src/Ivy/Widgets/Charts/Shared/Scatter.cs — added property and extension method
• src/frontend/src/widgets/charts/chartTypes.ts — added yAxisIndex to ScatterProps
• src/frontend/src/widgets/charts/ScatterChartWidget.tsx — added yAxisIndex to scatter series config

Commits

• 3349436 [01725] Add YAxisIndex to Scatter chart

Artifacts

Screenshots

[artem-ivy-ai]

Deploy timed out

I'm preparing your docs & samples for this PR. I'll update the comment as Sliplane reports progress.

Logs

No terminal state received from Sliplane after 30 minutes.