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feat(print): High-resolution image export (PNG/SVG) #95

@hangtime79

Description

@hangtime79

Summary

Export chart as high-resolution image file for embedding in other documents.

Formats

  • PNG - Rasterized, universal compatibility
  • SVG - Vector, infinitely scalable

Options

  • Resolution/DPI selection (72, 150, 300 dpi)
  • Transparent background option
  • Include/exclude legend
  • Include/exclude headers

Use Cases

  • Embedding in Word documents
  • Including in PowerPoint slides
  • Sharing via email/chat
  • Archival purposes

Technical Notes

  • SVG export should be cleaner (native format)
  • PNG requires rasterization at specified DPI
  • Consider file size warnings for very large exports

Parent Epic

Part of #86

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    area:printPrint and export functionalityenhancementNew feature or functionality

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