fix: switch activity picker to native iOS sheet behavior

[thisislvca]

This PR updates picker presentation by introducing dedicated sheet components while keeping the existing customizable selection view path.

Main changes:

• Keep existing customizable/fallback views:
  • DeviceActivitySelectionView
  • DeviceActivitySelectionViewPersisted
• Add dedicated native sheet views:
  • DeviceActivitySelectionSheetView
  • DeviceActivitySelectionSheetViewPersisted
• Keep iOS native sheet internals (.familyActivityPicker(isPresented:), Cancel/Done, parent/child VC wiring) behind the new sheet components.
• Fix sheet bottom background to systemGroupedBackground so the presented sheet matches system visuals.
• Update example app to expose both implementations clearly:
  • Sheet View (native iOS)
  • Selection View (custom wrapper)
• Fix a pre-existing example bug where tapping “Select apps” inside Create Activity did not open picker flow.
• Clarify README docs around:
  • sheet vs selection view choice
  • persisted vs non-persisted variants

Why

The native sheet UX is better for standard iOS behavior, but the customizable selection view path is still useful for custom presentation and fallback handling.
This keeps both paths first-class and explicit.

API impact

No breaking changes.

Added components:

• DeviceActivitySelectionSheetView
• DeviceActivitySelectionSheetViewPersisted

Notes:

• DeviceActivitySelectionView* remain the customizable inline/custom-wrapper components.
• onDismissRequest is available on the new sheet components.

Screenshots

Selection View (custom wrapper)	Sheet View (native iOS)

Updated example app UI

Validation

• Ran bun run pre-push (typecheck/lint/SwiftLint strict).
• Manually verified:
  • sheet view opens native iOS Cancel/Done flow
  • dismiss callback fires correctly
  • sheet background fix is applied
  • selection view custom-wrapper path still works
  • Create Activity “Select apps” now opens picker flow
  • example “Picker Views” labels reflect actual component model

[thisislvca]

@robertherber lmk if you need me to make any changes, it'd be smart to add the table in this PR to the README.md too in my opinion, happy to do so if you agree :)

I'm also working on the reporting feature, will PR tomorrow once I'm happy with the code quality.

[robertherber]

Awesome, thanks for digging into this! We had this initially as the only option in the library. The reason I switched it was to make it easy to create your own UI around the system view. Both for customizability and being able to provide a fallback view when the native view crashes.

Could you add it as a separate view here to keep the flexibility, and preferably keep both implementations in the example? I'd be happy to merge that! :)

[thisislvca]

Should be good now. I also fixed a small bug in the example app where the Create Activity picker didn't work, which was introduced back in 2024 :)

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/kingstinct/react-native-device-activity@84

commit: c242d61

[robertherber]

Looks great - thanks! 👍 Only thing is I think we need to keep isUserInteractionEnabled to allow interactions with the fallback error view

[thisislvca]

shoot my bad, totally missed that part