- Added WebViewCoordinator reference storage in BookmarkDetailLegacyView
- Added updateScrollProgress() method to WebViewCoordinator with 3% threshold
- Connected onScrollPhaseChange to coordinator's updateScrollProgress
- Added onExternalScrollUpdate callback to pass coordinator reference
- Scroll progress now flows: SwiftUI ScrollView -> Coordinator -> onScroll callback
This bridges the gap between SwiftUI ScrollView (which wraps the WebView)
and the JavaScript-style scroll progress tracking with threshold.
Ilyas Hallak
5c9c00134a