Fix bsky logo appearing during screen back transition

patches/react-native-screens@4.26.2.patch.md

@@ -13,3 +13,35 @@ The patch transitions a RecyclerView as a single unit without recursively transi
 Related issues:
 - https://github.com/callstack/react-native-pager-view/issues/1005
 - https://github.com/software-mansion/react-native-screens/issues/2461
+
+## iOS: composite secure-view content into JS-pop transition snapshots
+
+Fixes the GrowthHack Follow button flashing to the butterfly logo during
+JS-driven pops (custom back button, programmatic `goBack()`).
+
+For a JS-driven pop, React unmounts the screen before the native dismiss
+animation runs, so `RNSScreen setViewToSnapshot` freezes the screen with
+`snapshotViewAfterScreenUpdates:`. That is a render-server capture, and the
+render server excludes `isSecureTextEntry` canvas layers from every capture -
+the mechanism expo-privacy-sensitive borrows - so the Follow button is
+stripped from the frozen frame and the butterfly behind it shows for the
+whole pop animation. Native-first pops (swipe-back, native header back) are
+unaffected because they animate the live views and never snapshot.
+
+The exclusion flag is only consulted for layers inside the captured subtree,
+so a snapshot rooted below the flagged canvas still includes the content. By
+`setViewToSnapshot` time the screen's children are already unmounted (only
+the rendered pixels survive on the render server), so the patch captures the
+secure subtrees in `willBeUnmountedInUpcomingTransaction` - before the
+transaction's mutations apply - stashes them on the screen view via an
+associated object, and composites them over the main snapshot at their
+converted frames. Each overlay is re-wrapped in a fresh secure canvas so
+screenshots/recordings taken during the transition still exclude it.
+
+Known limitation: capturing AVPlayer-backed content this way is racy (the
+frozen video is sometimes blank); the overlay still covers the hidden
+fallback either way. Plain views (the Follow button) capture reliably.
+
+Verified in a minimal repro (Expo 57 / RN 0.86 / RNS 4.26 / New Arch) at
+~/work/rns-secure-pop-repro: zero fallback frames across recorded JS pops
+with the patch, ~700ms of visible fallback without it.