Add category search chips to Install tab for improved filtering (#4826)

* Add Quick Category Search Chips to Install tab

Add category shortcut chips on the Install tab that insert the category
name into the existing search box. Append each app's category as a
description tag so the existing description search filters by category.
Reuses the standard button style and existing search; no search, install,
or preset logic is changed.

* Fix install category chip filtering

* Fix category filter refresh behavior

---------

Co-authored-by: Chris Titus <contact@christitus.com>

functions/private/Find-AppsByNameOrDescription.ps1

@@ -10,6 +10,9 @@ function Find-AppsByNameOrDescription {
         .PARAMETER SearchString
             The string to be searched for. Wildcards are treated as literal characters.
 
+        .PARAMETER Category
+            When provided, only applications in this exact category are shown.
+
         .NOTES
             - Uses module-scope $sync (no parameter needed; inherits from caller's scope)
             - Performs literal matching (no wildcard expansion)
@@ -18,7 +21,10 @@ function Find-AppsByNameOrDescription {
     #>
     param(
         [Parameter(Mandatory = $false)]
-        [string]$SearchString = ""
+        [string]$SearchString = "",
+
+        [Parameter(Mandatory = $false)]
+        [string]$Category = ""
     )
 
     # Validate that $sync exists and has required structure
@@ -39,7 +45,7 @@ function Find-AppsByNameOrDescription {
 
     try {
         # Reset the visibility if the search string is empty or the search is cleared
-        if ([string]::IsNullOrWhiteSpace($SearchString)) {
+        if ([string]::IsNullOrWhiteSpace($SearchString) -and [string]::IsNullOrWhiteSpace($Category)) {
             $sync.ItemsControl.Items | ForEach-Object {
                 # Each item is a StackPanel container
                 $_.Visibility = [Windows.Visibility]::Visible
@@ -94,10 +100,11 @@ function Find-AppsByNameOrDescription {
 
                     # Check if app matches search criteria
                     if ($null -ne $appEntry) {
-                        $contentMatch = $appEntry.Content -like "*$escapedSearchString*"
-                        $descriptionMatch = $appEntry.Description -like "*$escapedSearchString*"
+                        $categoryMatch = -not [string]::IsNullOrWhiteSpace($Category) -and $appEntry.Category -eq $Category
+                        $contentMatch = [string]::IsNullOrWhiteSpace($Category) -and $appEntry.Content -like "*$escapedSearchString*"
+                        $descriptionMatch = [string]::IsNullOrWhiteSpace($Category) -and $appEntry.Description -like "*$escapedSearchString*"
 
-                        if ($contentMatch -or $descriptionMatch) {
+                        if ($categoryMatch -or $contentMatch -or $descriptionMatch) {
                             # Show the App and mark that this category has a match
                             $appControl.Visibility = [Windows.Visibility]::Visible
                             $categoryHasMatch = $true