Portrait String Art Makerv1.4.0

What changed

• New featureAdded support for square frames with up to 400 pins
• New featureAdded real-time string art generation preview
• RetentionRedesigned single-screen onboarding process
• UXAdded voice guidance with selector, hints, and tie-off instructions
• UXEnhanced PDF export with 5-column layout, 1:1 scale diagrams, and print optimization
• PerformanceGeneral performance improvements
• MonetizationFixed bugs related to in-app purchases
• PerformanceFixed bugs related to pin spacing

Original release notes

- Square frame support — generate string art on square frames (up to 400 pins)
  - Real-time string art generation preview.
  - Redesigned single-screen onboarding.
  - Voice guidance with voice selector, contextual step hints, and tie-off instructions.
  - Enhanced PDF export — compact 5-column sequence layout, tiled 1:1  scale pin diagram with crop marks, assembly guide, and B&W print optimization
  - Performance improvements.
  - Bug fixes for purchases and pin spacing.