Interaction service improvements

[JamesNK]

Description

• Max height on input dialogs. Content scrolls when exceeded I found a bug here: fix: FluentSelect inside overflow:auto container microsoft/fluentui-blazor#3960
• Improve visibility of validation errors by making dark mode dialogs darker
• Move test interactions to their own file in stress project

Fixes #10013

Before:

After:

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

[Copilot]

Pull Request Overview

This PR improves the interaction services by updating dialog styling in the dashboard and migrating interaction command definitions into a separate file for stress testing. Key changes include updated CSS variables and styling for dialogs, assigning an ID to the interaction dialog, and moving several interaction commands from the main app host file into a dedicated commands file.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
src/Aspire.Dashboard/wwwroot/css/app.css	Updated CSS variables and added max-height/overflow properties for dialogs to enhance visual consistency in light and dark modes.
src/Aspire.Dashboard/Components/Interactions/InteractionsProvider.cs	Assigned a unique dialog ID for input interactions.
playground/Stress/Stress.AppHost/Program.cs	Removed interaction command definitions and added an extension method call for interaction commands.
playground/Stress/Stress.AppHost/InteractionCommands.cs	Introduced a dedicated file with the full suite of interaction commands.