chore(examples): adopt the UIScene life cycle in the iOS examples

[sunnylqm]

三个 iOS 示例工程改为采用 UIScene 生命周期。

为什么

用 iOS 27 SDK 构建、但没有采用 UIScene 生命周期的 app，在 iOS 27 上会启动即崩。崩溃点是 UIApplicationEvaluateRuntimeIssueForNoSceneLifecycleAdoption 里的 EXC_BREAKPOINT。这是发版前在本机 iOS 27 模拟器上做原地升级验证时发现的。e2etest、testHotUpdate 和 Expo 示例都是在 didFinishLaunching 里创建窗口。CI 目前用 Xcode 26.4，还不会触发这个问题；升级到 Xcode 27 之前必须先改。

这是示例工程的问题，不涉及 react-native-update 本身。

改了什么

三个工程都在 Info.plist 里声明了 scene 配置，并新增一个 SceneDelegate：scene 连接时用这个 scene 创建窗口，再在窗口里启动 React Native。

• e2etest、testHotUpdate（RCTAppDelegate）： 关闭 automaticallyLoadReactNativeWindow，由 scene 调用 reactNativeFactory 启动，moduleName 和 initialProps 沿用 AppDelegate 上的值。
• expoUsePushy（ExpoAppDelegate）： 升级到 expo 57.0.30，直接使用 Expo 从 57.0.23 起自带的 ExpoAppSceneDelegate（EXExpoAppSceneDelegate），AppDelegate 改为遵守 ExpoReactNativeFactoryProvider。官方实现除了建窗口、启动 RN，还会把 URL、Universal Link、前后台生命周期、快捷操作等事件转发给 ExpoAppDelegate 及其订阅者（expo-linking 等），比手写版本完整。

采用 UIScene 之后，系统不再把深链交给 AppDelegate，所以深链改由 SceneDelegate 处理：

• 冷启动： 带进来的 URL 或 Universal Link 随 scene 送达，会作为 launchOptions 传给 RN。Linking.getInitialURL 照常可用，provider 的测试通道深链依赖它。
• 运行中： 收到的链接转发给 RCTLinkingManager，触发 Linking 的 url 事件。

验证

• 先用一个最小补丁在本机 iOS 27 模拟器上确认过 e2etest 能正常启动。这个 PR 的完整版本在本地没有再跑：按要求，iOS 示例工程不再做本地验证。
• 由本 PR 的 CI 用 Xcode 26 验证没有回归：e2e-ios 跑 e2etest，expo-build 跑 Expo 示例。

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Summary by CodeRabbit

• New Features
  • iOS apps now support scene-based startup, creating their window and launching React Native when a window scene connects. The example apps are configured to use a single application scene.
  • URLs and user activities are included when the app launches and forwarded when received later, supporting link handling across both entry points.
  • The Expo example now uses scene-based app startup.

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Reviewing files that changed from the base of the PR and between 999a8e1 and e0fe64a.

⛔ Files ignored due to path filters: 2

• Example/expoUsePushy/bun.lock is excluded by !**/*.lock
• Example/expoUsePushy/ios/Podfile.lock is excluded by !**/*.lock

📒 Files selected for processing: 3

• Example/expoUsePushy/ios/expoUsePushy/AppDelegate.swift
• Example/expoUsePushy/ios/expoUsePushy/Info.plist
• Example/expoUsePushy/package.json

🚧 Files skipped from review as they are similar to previous changes: 2

• Example/expoUsePushy/ios/expoUsePushy/Info.plist
• Example/expoUsePushy/ios/expoUsePushy/AppDelegate.swift

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📝 Walkthrough

Three iOS examples configure scene-based startup. Two Objective-C examples create windows and start React Native from SceneDelegate, and forward later linking events. The Expo example configures its scene delegate and updates the Expo dependency.

Changes: iOS scene-based startup

Layer / File(s)	Summary
Objective-C scene startup and linking Example/e2etest/ios/AwesomeProject/AppDelegate.mm, Example/e2etest/ios/AwesomeProject/Info.plist, Example/testHotUpdate/ios/AwesomeProject/AppDelegate.mm, Example/testHotUpdate/ios/AwesomeProject/Info.plist	Both examples disable automatic React Native window loading. Their SceneDelegate implementations create a window and start React Native when a window scene connects. They include available URL and user-activity data in launch options and forward later events to RCTLinkingManager. Each scene manifest registers SceneDelegate and disables multiple scenes.
Expo scene configuration Example/expoUsePushy/ios/expoUsePushy/AppDelegate.swift, Example/expoUsePushy/ios/expoUsePushy/Info.plist, Example/expoUsePushy/package.json	AppDelegate adopts ExpoReactNativeFactoryProvider and removes its explicit window creation and React Native startup branch. The scene manifest names EXExpoAppSceneDelegate. The Expo dependency version changes from ~57.0.22 to ~57.0.30.

Priority: ⬆️ High

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant UIKit
  participant SceneDelegate
  participant ReactNative
  participant RCTLinkingManager
  UIKit->>SceneDelegate: Connect window scene
  SceneDelegate->>ReactNative: Create window and start with launch options
  UIKit->>SceneDelegate: Deliver later URL or user activity
  SceneDelegate->>RCTLinkingManager: Forward URL or user activity

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Merge Risk: ⚪ Minimal · up to e0fe6

The examples now use scene-based startup while retaining supported React Native link handling and Expo event forwarding. No concrete material regression remains established, so merge risk is minimal.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files. (2 skipped: 2 …	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: updating the iOS examples to adopt the UIScene lifecycle.

Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 1 files. (2 skipped: 2 unsupported.)

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

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Actionable comments posted: 1

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• 🪄 Fix comments: Fix CodeRabbit comments on this PR

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Inline comments:
Review comments at @Example/expoUsePushy/ios/expoUsePushy/AppDelegate.swift:
- Line 53: Update SceneDelegate to preserve Expo app-delegate subscriber
forwarding for scene URL, user-activity, and lifecycle events: use
EXExpoAppSceneDelegate after upgrading Expo to version 57.0.23 or later, or
forward the complete scene event set through Expo’s app-delegate subscriber
path. Retain the existing RCTLinkingManager URL handling.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: defaults
• Review profile: CHILL
• Plan: Advanced
• Run ID: ba4116cd-a9e0-4995-969e-42d84b91549e

📥 Commits

Reviewing files that changed from the base of the PR and between 08dc697 and 999a8e1.

📒 Files selected for processing: 6

• Example/e2etest/ios/AwesomeProject/AppDelegate.mm
• Example/e2etest/ios/AwesomeProject/Info.plist
• Example/expoUsePushy/ios/expoUsePushy/AppDelegate.swift
• Example/expoUsePushy/ios/expoUsePushy/Info.plist
• Example/testHotUpdate/ios/AwesomeProject/AppDelegate.mm
• Example/testHotUpdate/ios/AwesomeProject/Info.plist

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