fix(ios): accessibility path follows correct position in scroll view

[eszlamczyk]

What/Why?

Fixes #696.

On iOS, VoiceOver drew the focus ring for EnrichedMarkdownText text at the wrong position (and failed to scroll to it) when the component was inside a ScrollView - e.g. a chat feed that appends messages.

Multi-line text ranges described their focus ring with an accessibilityPath in absolute screen coordinates, computed once and cached. Screen coordinates go stale the moment the ScrollView scrolls, so the ring pointed at the text's old position. This drops the screen-space path and describes every accessibility element with accessibilityFrameInContainerSpace, which UIKit re-projects to the screen on every query, so the geometry stays correct under scroll. (This matches the fix the reporter proposed.)

Note: because of this change we changed paragraphs to be one block instead of block per line.

Testing

• Ran the example app's Text screen (EnrichedMarkdownText inside a ScrollView with long, multi-line content) on iOS. With VoiceOver / Accessibility Inspector, scrolled the content and navigated between paragraphs: the focus ring now sits on the visible text and VoiceOver scrolls each element into view. Verified single-line paragraphs, links, images, and headings still focus correctly.

Screenshots

Before

Screen.Recording.2026-08-28.at.11.21.32.mov

After

Screen.Recording.2026-08-28.at.11.17.19.mov

PR Checklist

• Code compiles and runs on iOS
• Code compiles and runs on Android
• Updated documentation/README if applicable
• Ran example app to verify changes
• E2E tests are passing
• Required E2E tests have been added (if applicable)

[Copilot]

Pull request overview

Fixes an iOS VoiceOver focus-ring positioning/scrolling bug for EnrichedMarkdownText when hosted inside a ScrollView, by avoiding stale screen-space geometry.

Changes:

• Removes use of accessibilityPath (screen-coordinate, computed/cached) for multi-line text ranges.
• Always sets accessibilityFrameInContainerSpace for each UIAccessibilityElement, allowing UIKit to project coordinates to screen space on demand (stays correct while scrolling).

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