Feature: Added simple header to search results

[yaira2]

[Copilot]

Pull Request Overview

This PR adds a search header to display context when viewing search results in the application. The header includes a search icon and displays "Search results for {query}" text.

• Adds a visual search results header with icon and query text
• Modifies grid layout to accommodate the new header above the filter header
• Implements UI binding properties and localization support for the search header

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
ModernShellPage.xaml	Adds new row definition and search header UI with grid layout adjustments
ShellViewModel.cs	Implements search header properties and bindings with lifecycle management
Resources.resw	Adds localized string resource for search results header text
UIHelpers.cs	Adds helper method to load search icon from system resources
Constants.cs	Defines search icon constant for system resource extraction

Comments suppressed due to low confidence (1)