Workaround bug in interaction provider when displaying dialogs on load

[JamesNK]

Description

Fixes #12858

Caused by regression in FluentUI - microsoft/fluentui-blazor#4095

Checklist

• Is this feature complete?
  • Yes. Ready to ship.
  • No. Follow-up changes expected.
• Are you including unit tests for the changes and scenario tests if relevant?
  • Yes
  • No
• Did you add public API?
  • Yes
    • If yes, did you have an API Review for it?
      • Yes
      • No
    • Did you add <remarks /> and <code /> elements on your triple slash comments?
      • Yes
      • No
  • No
• Does the change make any security assumptions or guarantees?
  • Yes
    • If yes, have you done a threat model and had a security review?
      • Yes
      • No
  • No
• Does the change require an update in our Aspire docs?
  • Yes
    • Link to aspire-docs issue (consider using one of the following templates):
      • New (or update) doc-idea template
      • New breaking-change template
      • New diagnostic template
  • No

[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 -- 12886

Or

• Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.ps1) } 12886"

[Copilot]

Pull Request Overview

This PR implements a workaround for a FluentUI bug that causes errors when displaying dialogs on component load. The fix adds a 2-second delay before starting to watch for interactions, allowing FluentUI's JavaScript to initialize properly.

Key changes:

• Added a Task.Delay(TimeSpan.FromSeconds(2)) before WatchInteractionsAsync() in InteractionsProvider initialization
• Included explanatory comments and a TODO referencing the upstream FluentUI issue #4311

[davidfowl]

😢

[JamesNK]

/backport to release/13.0

[github-actions]

Started backporting to release/13.0: https://github.com/dotnet/aspire/actions/runs/19416349924