Implement search bar debounce functionality to improve UI responsiveness (#3371)

* Implement search bar debounce functionality to improve UI responsiveness

* Enhance app search functionality to include description matching

scripts/main.ps1

@@ -376,12 +376,15 @@ if ($sync["ISOLanguage"].Items.Count -eq 1) {
 }
 $sync["ISOLanguage"].SelectedIndex = 0
 
-$sync["SearchBar"].Add_TextChanged({
-    if ($sync.SearchBar.Text -ne "") {
-        $sync.SearchBarClearButton.Visibility = "Visible"
-    } else {
-        $sync.SearchBarClearButton.Visibility = "Collapsed"
-    }
+# The SearchBarTimer is used to delay the search operation until the user has stopped typing for a short period
+# This prevents the ui from stuttering when the user types quickly as it dosnt need to update the ui for every keystroke
+
+$searchBarTimer = New-Object System.Windows.Threading.DispatcherTimer
+$searchBarTimer.Interval = [TimeSpan]::FromMilliseconds(300)
+$searchBarTimer.IsEnabled = $false
+
+$searchBarTimer.add_Tick({
+    $searchBarTimer.Stop()
     switch ($sync.currentTab) {
         "Install" {
             Find-AppsByNameOrDescription -SearchString $sync.SearchBar.Text
@@ -391,6 +394,17 @@ $sync["SearchBar"].Add_TextChanged({
         }
     }
 })
+$sync["SearchBar"].Add_TextChanged({
+    if ($sync.SearchBar.Text -ne "") {
+        $sync.SearchBarClearButton.Visibility = "Visible"
+    } else {
+        $sync.SearchBarClearButton.Visibility = "Collapsed"
+    }
+    if ($searchBarTimer.IsEnabled) {
+        $searchBarTimer.Stop()
+    }
+    $searchBarTimer.Start()
+})
 
 $sync["Form"].Add_Loaded({
     param($e)