feat: add config-driven AppX package removal tab

- Add config/appx.json with curated list of removable AppX packages

- Add AppX Removal tab (WPFTab6) with Select All, Clear, and Remove buttons

- Reuse existing Invoke-WPFUIElements engine for minimal code footprint

- Add Invoke-WPFAppxRemoval.ps1 for background runspace package removal

- Add theme colors for the new tab button in light and dark modes

functions/public/Invoke-WPFAppxRemoval.ps1

@@ -0,0 +1,50 @@
+function Invoke-WPFAppxRemoval {
+    <#
+    .SYNOPSIS
+        Removes the selected AppX packages in a background runspace.
+    #>
+
+    if ($sync.ProcessRunning) {
+        $msg = "A process is currently running. Please wait for it to finish."
+        [System.Windows.MessageBox]::Show($msg, "Winutil", [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Warning)
+        return
+    }
+
+    $selected = @($sync.selectedAppx)
+    if ($selected.Count -eq 0) {
+        $msg = "Please select the AppX packages you wish to remove."
+        [System.Windows.MessageBox]::Show($msg, "Winutil", [System.Windows.MessageBoxButton]::OK, [System.Windows.MessageBoxImage]::Warning)
+        return
+    }
+
+    $totalSteps = $selected.Count
+    $completedSteps = 0
+
+    Invoke-WPFUIThread -ScriptBlock { Set-WinUtilTaskbaritem -state "Normal" -value 0.01 -overlay "logo" }
+
+    $handle = Invoke-WPFRunspace -ParameterList @(("selected", $selected), ("completedSteps", $completedSteps), ("totalSteps", $totalSteps)) -ScriptBlock {
+        param($selected, $completedSteps, $totalSteps)
+
+        $sync.ProcessRunning = $true
+
+        for ($i = 0; $i -lt $selected.Count; $i++) {
+            $key = $selected[$i]
+            $appInfo = $sync.configs.appxHashtable.$key
+            $packageId = $appInfo.PackageId
+            $friendlyName = $appInfo.content
+
+            Set-WinUtilProgressBar -Label "Removing $friendlyName" -Percent ($completedSteps / $totalSteps * 100)
+            Remove-WinUtilAPPX -Name $packageId
+            $completedSteps++
+            $progress = $completedSteps / $totalSteps
+            Invoke-WPFUIThread -ScriptBlock { Set-WinUtilTaskbaritem -value $progress }
+        }
+
+        Set-WinUtilProgressBar -Label "AppX Removal finished" -Percent 100
+        $sync.ProcessRunning = $false
+        Invoke-WPFUIThread -ScriptBlock { Set-WinUtilTaskbaritem -state "None" -overlay "checkmark" }
+        Write-Host "================================="
+        Write-Host "--   AppX Removal Finished   ---"
+        Write-Host "================================="
+    }
+}

functions/public/Invoke-WPFButton.ps1

@@ -65,6 +65,23 @@ function Invoke-WPFButton {
         "WPFUpdatessecurity" {Invoke-WPFUpdatessecurity}
         "WPFGetInstalled" {Invoke-WPFGetInstalled -CheckBox "winget"}
         "WPFGetInstalledTweaks" {Invoke-WPFGetInstalled -CheckBox "tweaks"}
+        "WPFSelectAllAppx" {
+            $sync.configs.appxHashtable.Keys | ForEach-Object {
+                if ($sync.$_) {
+                    $sync.$_.IsChecked = $true
+                }
+            }
+        }
+        "WPFClearAppxSelection" {
+            $sync.configs.appxHashtable.Keys | ForEach-Object {
+                if ($sync.$_) {
+                    $sync.$_.IsChecked = $false
+                }
+            }
+        }
+        "WPFRemoveSelectedAppx" {
+            Invoke-WPFAppxRemoval
+        }
         "WPFCloseButton" {$sync.Form.Close(); Write-Host "Bye bye!"}
         "WPFMinimizeButton" {$sync.Form.WindowState = [Windows.WindowState]::Minimized}
         "WPFselectedAppsButton" {$sync.selectedAppsPopup.IsOpen = -not $sync.selectedAppsPopup.IsOpen}

functions/public/Invoke-WPFSelectedCheckboxesUpdate.ps1

@@ -30,6 +30,7 @@ function Invoke-WPFSelectedCheckboxesUpdate{
                 elseif ($appKey.StartsWith("WPFTweaks")) { "Tweaks" }
                 elseif ($appKey.StartsWith("WPFToggle")) { "Toggle" }
                 elseif ($appKey.StartsWith("WPFFeature")) { "Feature" }
+                elseif ($appKey.StartsWith("WPFAppx")) { "Appx" }
                 else { "na" }
 
     switch ($group) {
@@ -81,6 +82,16 @@ function Invoke-WPFSelectedCheckboxesUpdate{
                 $sync.selectedFeatures.Remove($appKey)
             }
         }
+        "Appx" {
+            if ($type -eq "Add") {
+                if (!$sync.selectedAppx.Contains($appKey)) {
+                    $sync.selectedAppx.Add($appKey)
+                }
+            }
+            else{
+                $sync.selectedAppx.Remove($appKey)
+            }
+        }
         default {
             Write-Host "Unknown group for checkbox: $($appKey)"
         }