Padding does not apply to Text nested inside another Text (iOS and Android).

Description

When trying to apply padding to a Text nested inside another Text, padding does not work.

Steps to reproduce

1. Write some text inside a Text.
2. Wrap a portion of the text with another Text.
3. Add padding to the nested Text. You can also add a backgroundColor to better see the padding.
   Result: Padding is not applied.

React Native Version

0.81.5

Affected Platforms

Runtime - iOS

Output of npx @react-native-community/cli info

System:
  OS: macOS 15.5
  CPU: (12) x64 Intel(R) Core(TM) i7-8850H CPU @ 2.60GHz
  Memory: 66.81 MB / 16.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 24.11.0
    path: /Users/patosala/.nvm/versions/node/v24.11.0/bin/node
  Yarn:
    version: 1.22.22
    path: /usr/local/bin/yarn
  npm:
    version: 11.6.1
    path: /Users/patosala/.nvm/versions/node/v24.11.0/bin/npm
  Watchman: Not Found
Managers:
  CocoaPods:
    version: 1.15.2
    path: /usr/local/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.4
      - iOS 18.4
      - macOS 15.4
      - tvOS 18.4
      - visionOS 2.4
      - watchOS 11.4
  Android SDK: Not Found
IDEs:
  Android Studio: Not Found
  Xcode:
    version: 16.3/16E140
    path: /usr/bin/xcodebuild
Languages:
  Java: Not Found
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 19.1.0
    wanted: 19.1.0
  react-native:
    installed: 0.81.5
    wanted: 0.81.5
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: Not found
  newArchEnabled: Not found
iOS:
  hermesEnabled: Not found
  newArchEnabled: Not found

Stacktrace or Logs

-

MANDATORY Reproducer

https://snack.expo.dev/@patosala/text-padding

Screenshots and Videos

从必需的 Snack 复现用例开始，验证 iOS 和 Android 上嵌套 Text 的 padding 行为。然后跟踪 React Native Text 的实现以及原生文本布局处理；当 padding 在受影响的平台上能够明显应用于嵌套 Text 的内容，且不会导致普通 Text 渲染回归时，即表示完成。