[Windows] Fixed SearchHandler issues

[Tamilarasan-Paranthaman]

Note

Are you waiting for the changes in this PR to be merged?
It would be very helpful if you could test the resulting artifacts from this PR and let us know in a comment if this change resolves your issue. Thank you!

Root Cause of the issue

• The SearchHandler property values such as TextColor, CancelButtonColor, BackgroundColor, CharacterSpacing, HorizontalTextAlignment, and TextTransform, are not being set to the native control.

Description of Change

• The missing SearchHandler property values are now correctly applied to the native control, and it is functioning as expected.

Issues Fixed

Fixes #29493

Tested the behaviour in the following platforms

• Windows
• iOS
• Android
• Mac

Screenshot

Before Fix	After Fix
Before-Fix.mp4	After-Fix.mp4

[dotnet-policy-service]

Hey there @@Tamilarasan-Paranthaman! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[Copilot]

Pull Request Overview

This PR fixes issues with the Windows SearchHandler by ensuring that all SearchHandler properties are properly applied to the native control. The changes include updates to extension methods for handling SearchHandler properties, new event subscriptions in the ShellItemHandler for Windows, and corresponding test cases to validate the behavior.

Reviewed Changes

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

File	Description
src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue29493.cs	Added automated test case to verify SearchHandler values.
src/Controls/tests/TestCases.HostApp/Issues/Issue29493.cs	Updated host application to invoke SearchHandler property updates via a button click.
src/Controls/src/Core/Platform/Windows/Extensions/AutoSuggestBoxExtensions.cs	Introduced new extension methods that update various SearchHandler properties for Windows.
src/Controls/src/Core/Handlers/Shell/ShellItemHandler.Windows.cs	Revised event handling and property change handling to reflect the added SearchHandler updates.

Comments suppressed due to low confidence (1)

src/Controls/src/Core/Platform/Windows/Extensions/AutoSuggestBoxExtensions.cs:11

• There appears to be a spelling mistake in 'TextTransformUtilites'; it is likely intended to be 'TextTransformUtilities'.

platformControl.Text = TextTransformUtilites.GetTransformedText(inputView.Text, inputView.TextTransform);

[jsuarezruiz]

/azp run MAUI-UITests-public

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[jsuarezruiz]

/azp run MAUI-UITests-public

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).