Clean up analyzer warnings across app search and ISO workflows (#4794)

* Clean up analyzer warnings

* Align analyzer warning cleanup policy

* Run PSScriptAnalyzer directly in unittests workflow

* Bind lazy-rendered buttons to click handlers

* Remove WinUtil performance tracing

* Fix Win11 ISO creator temp directory reuse

functions/private/Show-CustomDialog.ps1

@@ -193,6 +193,7 @@ function Show-CustomDialog {
     # Define the Regex to find hyperlinks formatted as HTML <a> tags
     $regex = [regex]::new('<a href="([^"]+)">([^<]+)</a>')
     $lastPos = 0
+    $linkHoverBrush = $LinkHoverForegroundColor
 
     # Iterate through each match and add regular text and hyperlinks
     foreach ($match in $regex.Matches($Message)) {
@@ -210,20 +211,23 @@ function Show-CustomDialog {
         $hyperlink.Foreground = $LinkForegroundColor
 
         $hyperlink.Add_Click({
-            param($sender, $args)
-            Start-Process $sender.NavigateUri.AbsoluteUri
+            param($eventSender, $routedEvent)
+            $null = $routedEvent
+            Start-Process $eventSender.NavigateUri.AbsoluteUri
         })
         $hyperlink.Add_MouseEnter({
-            param($sender, $args)
-            $sender.Foreground = $LinkHoverForegroundColor
-            $sender.FontSize = ($FontSize + ($FontSize / 4))
-            $sender.FontWeight = "SemiBold"
+            param($eventSender, $routedEvent)
+            $null = $routedEvent
+            $eventSender.Foreground = $linkHoverBrush
+            $eventSender.FontSize = ($FontSize + ($FontSize / 4))
+            $eventSender.FontWeight = "SemiBold"
         })
         $hyperlink.Add_MouseLeave({
-            param($sender, $args)
-            $sender.Foreground = $LinkForegroundColor
-            $sender.FontSize = $FontSize
-            $sender.FontWeight = "Normal"
+            param($eventSender, $routedEvent)
+            $null = $routedEvent
+            $eventSender.Foreground = $LinkForegroundColor
+            $eventSender.FontSize = $FontSize
+            $eventSender.FontWeight = "Normal"
         })
 
         $messageTextBlock.Inlines.Add($hyperlink)