Apple Notes in iOS 27: dividers, section links, and Siri integration

iOS 27 brings Apple Notes divider lines, section links for navigating long notes, and integration with the new Siri AI to add and reformat text. Pasted Markdown now auto-converts to rich text, and Image Playground generates photorealistic images with a hidden SynthID watermark.

• Divider lines and section links added for structuring notes
• Siri can add and reformat text in new and existing notes
• Pasted Markdown automatically converts to rich text
• Image Playground generates photorealistic images with SynthID watermark