Add test coverage for Contracts New Page

[Copilot]

Contracts New Page had no test coverage. Added 10 tests following Estate Index Page patterns for button navigation and form interactions.

Tests Added

• Rendering & Navigation: Page render, PageTitle component, Cancel button → /contracts, Create Contract button presence
• Operator Loading: Success and empty states for operator dropdown
• Form Submission: Success with navigation, failure with error display
• Validation: Required field enforcement for Description and Operator

Pattern Example

Following Estate Index approach for button finding and navigation verification:

IRefreshableElementCollection<IElement> buttons = cut.FindAll("button");
IElement? cancelButton = buttons.FirstOrDefault(b => b.TextContent.Contains("Cancel"));
cancelButton.Click();

_fakeNavigationManager.Uri.ShouldContain("/contracts");

Test Count: ContractsNewPageTests.cs: 10 tests (previously 0)

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• f.feedz.io
  • Triggering command: /usr/bin/dotnet dotnet test --filter FullyQualifiedName~ContractsNewPageTests --verbosity normal (dns block)
  • Triggering command: /usr/bin/dotnet dotnet restore --verbosity quiet (dns block)
  • Triggering command: /usr/share/dotnet/dotnet dotnet restore /home/REDACTED/work/EstateManagementUI/EstateManagementUI/EstateManagementUI.sln ep/bin/linux-x64/rg (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

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This section details on the original issue you should resolve

<issue_title>Improve Code Coverage on Contracts New Page</issue_title>
<issue_description>Use the estate index page tests as a guide on how to find buttons and also verify navigation</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Improve Code Coverage on Contracts New Page #717

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