Update React and ReactDOM to version 19.2.1 across all projects

[joperezr]

Updating React dependencies on our templates project in due to CVE-2025-55182

[github-actions]

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

curl -fsSL https://raw.githubusercontent.com/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.sh | bash -s -- 13325

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.ps1) } 13325"

[Copilot]

Pull request overview

This PR updates React and ReactDOM dependencies to version 19.2.1 across all projects in the repository to address security vulnerability CVE-2025-55182.

Key changes:

• Updated React from versions 19.0.0 and 19.1.1 to 19.2.1
• Updated ReactDOM from versions 19.0.0 and 19.1.1 to 19.2.1
• Updated scheduler dependency to ^0.27.0 where applicable

Reviewed changes

Copilot reviewed 3 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/Aspire.ProjectTemplates/templates/aspire-py-starter/13.0/frontend/package.json	Updated React and ReactDOM dependencies to ^19.2.1 in template project
src/Aspire.ProjectTemplates/templates/aspire-py-starter/13.0/frontend/package-lock.json	Updated lock file with new React 19.2.1 versions, integrity hashes, and scheduler dependency to ^0.27.0
playground/AspireWithJavaScript/AspireJavaScript.Vite/package.json	Updated React and ReactDOM dependencies from ^19.0.0 to ^19.2.1 in Vite playground
playground/AspireWithJavaScript/AspireJavaScript.Vite/package-lock.json	Updated lock file with new React 19.2.1 versions, scheduler upgraded from ^0.25.0 to ^0.27.0
playground/AspireWithJavaScript/AspireJavaScript.React/package.json	Updated React and ReactDOM dependencies to ^19.2.1 in React playground
playground/AspireWithJavaScript/AspireJavaScript.React/package-lock.json	Updated lock file with new React 19.2.1 versions, scheduler upgraded from ^0.26.0 to ^0.27.0

Files not reviewed (3)

• playground/AspireWithJavaScript/AspireJavaScript.React/package-lock.json: Language not supported
• playground/AspireWithJavaScript/AspireJavaScript.Vite/package-lock.json: Language not supported
• src/Aspire.ProjectTemplates/templates/aspire-py-starter/13.0/frontend/package-lock.json: Language not supported