Promote React Native Windows 0.85 to latest

[anuagragith]

Description

Promote React Native Windows 0.85 from the npm preview channel to the
latest stable channel.

Why

React Native 0.85.3 is the latest published React Native 0.85 patch and is
already integrated into 0.85-stable. This PR prepares the final React Native
Windows 0.85 promotion once the remaining release gates are complete.

The previous stable line must be published under v0.84-stable before this
PR is merged.

What

• Changes the Beachball defaultNpmTag for all 15 promoted packages from
  preview to latest.
• Enables stable patch changes and disables further prerelease changes for the
  promoted packages.
• Adds the corresponding patch change files generated by promote-release.
• Preserves each package's existing preview version until the generated
  release PR performs the stable version bump.
• Produces react-native-windows@0.85.0 and matching promoted packages when
  the release change files are consumed.

Merge prerequisite

Do not merge this PR until:

• The generated 0.84 release PR has published 0.84.1.
• react-native-windows and the matching CLI resolve to 0.84.1 through
  v0.84-stable.
• Final 0.85 release sign-offs are complete.

Validation

• Rebased onto 0.85-stable commit
  994735040342d491174bd2b496c0a643614ca8ed, including dependency PR
  #16472.
• Ran beachball check --branch origin/0.85-stable successfully.
• Ran git diff --check origin/0.85-stable...HEAD successfully.
• Verified Prettier formatting for all 30 committed JSON files.
• Ran the full repository lint without cache successfully: 64 targets passed,
  0 failed.
• Ran the full repository build without cache successfully: 29 targets passed,
  0 failed.
• Verified all 15 package manifests contain only the expected Beachball
  promotion changes.
• Verified all 15 generated change files are patch changes with the expected
  Promote 0.85 to latest message.
• Verified yarn.lock is identical to current origin/0.85-stable, preserving
  the dependency updates from #16472.
• Completed an isolated release simulation that produced:
  • react-native-windows@0.85.0
  • npm tag latest
  • Git tag react-native-windows_v0.85.0
  • No production source-code changes

Changelog

Should this change be included in the release notes: no

Microsoft Reviewers: Open in CodeFlow

[Copilot]

🔵 Needs a closer look

The configuration is internally consistent, but publishing to latest depends on external release prerequisites and final sign-offs.

0 open findings

What changed in this PR

Promotes the 15 React Native Windows 0.85 packages from npm preview to latest.

Changes:

• Enables stable patch releases and disables prerelease changes.
• Adds patch change files for the promoted packages.

File	Description
vnext/​package.json	Promotes react-native-windows.
packages/​react-native-windows-init/​package.json	Promotes the initializer.
packages/​react-native-platform-override/​package.json	Promotes platform override tooling.
packages/​@react-native-windows/​telemetry/​package.json	Promotes telemetry tooling.
packages/​@react-native-windows/​perf-testing/​package.json	Promotes performance testing.
packages/​@react-native-windows/​package-utils/​package.json	Promotes package utilities.
packages/​@react-native-windows/​fs/​package.json	Promotes filesystem utilities.
packages/​@react-native-windows/​find-repo-root/​package.json	Promotes repository discovery.
packages/​@react-native-windows/​find-dotnet-tools/​package.json	Promotes .NET tool discovery.
packages/​@react-native-windows/​codegen/​package.json	Promotes Windows codegen.
packages/​@react-native-windows/​cli/​package.json	Promotes the Windows CLI.
packages/​@react-native-windows/​automation/​package.json	Promotes automation tooling.
packages/​@react-native-windows/​automation-commands/​package.json	Promotes automation commands.
packages/​@react-native-windows/​automation-channel/​package.json	Promotes the automation channel.
packages/​@office-iss/​react-native-win32/​package.json	Promotes React Native Win32.
change/​react-native-windows-init-af4de282-96f9-4f5f-945b-9e33cc8f2da6.json	Adds initializer patch change.
change/​react-native-windows-586c169c-9914-47a7-94c4-eecf0462f0ed.json	Adds RNW patch change.
change/​react-native-platform-override-e5a9d834-f967-414e-b852-9275bc567641.json	Adds platform override patch change.
change/​@react-native-windows-telemetry-58b559c0-e52e-4dbd-bdfd-5dfa755dc107.json	Adds telemetry patch change.
change/​@react-native-windows-perf-testing-d0b44dbb-4aad-4437-8b13-c00adecb18b9.json	Adds performance-testing patch change.
change/​@react-native-windows-package-utils-a2f6a09a-dc63-448a-b4b8-540f99a9f072.json	Adds package-utils patch change.
change/​@react-native-windows-fs-5eeded08-a15e-4a04-bb6d-249477bfd836.json	Adds filesystem patch change.
change/​@react-native-windows-find-repo-root-16852648-13bb-4e72-9827-f4ba0a4b33da.json	Adds repo-root patch change.
change/​@react-native-windows-find-dotnet-tools-2d49e5dc-ffb1-425e-a1fe-2fa2bcdaa22c.json	Adds .NET-tools patch change.
change/​@react-native-windows-codegen-76a77f39-64cd-40a7-805f-22207eed0b4c.json	Adds codegen patch change.
change/​@react-native-windows-cli-95638f65-f02b-4d83-a0c6-aa4b69787f37.json	Adds CLI patch change.
change/​@react-native-windows-automation-commands-3fa79757-9e4b-46c4-883a-f2a391c3c917.json	Adds automation-commands patch change.
change/​@react-native-windows-automation-channel-fb50d994-39c9-4412-8960-1e29920f132e.json	Adds automation-channel patch change.
change/​@react-native-windows-automation-2606f552-4fe4-48f4-a637-65eedd8f39c8.json	Adds automation patch change.
change/​@office-iss-react-native-win32-37ee98de-a3da-4ecf-8752-bac4aa6cff44.json	Adds Win32 patch change.

🧠 Review effort: Balanced

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