[testableapple]

Ticket: https://linear.app/stream/issue/RN-520

🎯 Goal

Follow-up to #3965, which moved the nightly onto Flutter's OS matrix. Its first run on the branch (42874414367) showed:

• Android: every version passed and the coverage map was built.
• iOS 26.2: hit the 120-minute test-step limit. One pass on a macos-15 runner takes about 105 minutes, and that pass had 27 failures.
• iOS 17.5, which the suite had never run on, had its own failures.

🛠 Implementation details

iOS 26 and later

• System alert buttons match label + button traits twice: a wrapper (_UIInterfaceActionCustomViewRepresentationView) and the action view (_UIAlertControllerActionView), with the same frame. Detox then fails on multiple matches, which caused 15 of the 27 failures (Delete, Block, Leave, Flag). Alert buttons are now tapped at index: 0. I checked the matches on a local iOS 27 simulator.

iOS 17

• Detox never counts the menu's transparent message-overlay-backdrop as visible. closeContextMenu now waits for the backdrop to exist, taps a point on it away from the menu, and taps again until it is gone. This fixed 4 moderation tests.
• The channel hidden under an open thread is still reported. On iOS, assertMessages counts only matches on screen.
• Taps during animations: the "N Replies" label and the poll's multiple-votes switch now use waitToSettleAndClick. Message-list swipes retry while Detox reports the list as not hittable (a thread still sliding in).

One SDK bug: RN-521. On iOS 17, "scroll to bottom" leaves the newest message's footer under the composer. test_reloadsSkippedMessages_whenScrolledToTheBottom is skipped on iOS below 18 through the new itExceptOnOldIOS. That helper reads the simulator's runtime, and the Fastfile's test-id parser recognizes it.

Timeout: the iOS nightly job gets 360 minutes and its test step 300, as in the Flutter nightly.

🧪 Testing

• iOS 17.5, iPhone 15 Pro:
  • Before the fixes, the full suite had 22 failures.
  • After the first round, a full run had 174 passed and 3 failed.
  • Those 3 were then fixed, and each passed twice when re-run.
• The alert matcher was checked on iOS 27.1 with a probe test.
• Nightly on this branch: 42902107500.
  • Android API 36 coverage batch 0 failed when the emulator died mid-run (RN-513). Its tests keep their previous coverage in the map.
• eslint, prettier, actionlint and tsc -p e2e are clean.

☑️ Checklist

• I have signed the Stream CLA (required)
• PR targets the develop branch
• Documentation is updated
• New code is tested in main example apps, including all possible scenarios
  • SampleApp iOS and Android
  • Expo iOS and Android

[stream-ci-bot]

🎉 This PR is included in version 10.0.1 🎉

The release is available on:

• v10.0.1
• GitHub release

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