[RC1] Blazor WASM respects UI culture setting

[guardrex]

Fixes #35872

This one is a little late ... I should've had this in last week. 🙈🏃‍♂️😄 We won't link to a specific section from the What's New section because there isn't one to link to. This was just a NOTE in the article, so we'll version that content for <10.0 and float on.

Since it's a little late .........................

Welcome to the party pal! - John McClane (Bruce Willis), Die Hard, ©1988 20th Century Fox

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Internal previews

📄 File	🔗 Preview link
aspnetcore/blazor/globalization-localization.md	aspnetcore/blazor/globalization-localization
aspnetcore/release-notes/aspnetcore-10.0.md	aspnetcore/release-notes/aspnetcore-10.0

[Copilot]

Pull Request Overview

This PR updates documentation to reflect that Blazor WebAssembly apps in .NET 10 now respect the UI culture setting via DefaultThreadCurrentUICulture, resolving a limitation that existed in .NET 9 and earlier versions.

• Adds a new feature section to the .NET 10 release notes documenting the UI culture enhancement
• Updates the globalization documentation to version-gate the old limitation with moniker ranges
• Revises NOTE sections to clarify the behavior difference between .NET 9 and .NET 10

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
aspnetcore/release-notes/aspnetcore-10/includes/blazor.md	Adds new section documenting Blazor WASM UI culture support in .NET 10
aspnetcore/release-notes/aspnetcore-10.0.md	Updates the modification date to reflect recent changes
aspnetcore/blazor/globalization-localization.md	Version-gates existing NOTEs and updates content to reflect .NET 10 improvements

[guardrex]

... and I checked the rest of the article. I think everything else is ok ... as long as this ...

<script>
  Blazor.start({
    webAssembly: {
      applicationCulture: 'en-US'
    }
  });
</script>

... doesn't have a new option for something named applicationUICulture.

[ilonatommy]

applicationCulture

This value is setting globalization only, so current culture. Localization (satellite assemblies / current UI, or however else it can be called) culture is not defined on this level.