chore: update version to 2.0.1 and enhance Classic functionality with dynamic field discovery

scripts/Enable-ExpiryIndicator.ps1

@@ -27,9 +27,11 @@ try {
     $list = $context.Web.Lists.GetByTitle($ListTitle)
     $field = $list.Fields.GetByInternalNameOrTitle($ExpiryFieldInternalName)
     $customActions = $list.UserCustomActions
+    $webCustomActions = $context.Web.UserCustomActions
     $context.Load($list)
     $context.Load($field)
     $context.Load($customActions)
+    $context.Load($webCustomActions)
     $context.ExecuteQuery()
 
     if ($field.InternalName -ne $ExpiryFieldInternalName) {
@@ -55,15 +57,25 @@ try {
         $_.DeleteObject()
     }
 
+    if (-not $SkipClassic) {
+        $webCustomActions | Where-Object {
+            $_.Name -eq 'ExpiryIndicator.Classic.ScriptLink'
+        } | ForEach-Object {
+            $_.DeleteObject()
+        }
+    }
+
     $context.ExecuteQuery()
 
     if (-not $SkipClassic) {
-        $scriptAction = $list.UserCustomActions.Add()
+        # SharePoint permits Location=ScriptLink only on Web/Site custom
+        # actions, not on List.UserCustomActions. The runtime detects the
+        # current list and its bound expiry field by itself.
+        $scriptAction = $context.Web.UserCustomActions.Add()
         $scriptAction.Name = 'ExpiryIndicator.Classic.ScriptLink'
         $scriptAction.Title = 'ExpiryIndicator Classic runtime'
         $scriptAction.Location = 'ScriptLink'
-        $separator = if ($ClassicScriptUrl.Contains('?')) { '&' } else { '?' }
-        $scriptAction.ScriptSrc = $ClassicScriptUrl + $separator + 'expiryField=' + [Uri]::EscapeDataString($field.InternalName)
+        $scriptAction.ScriptSrc = $ClassicScriptUrl
         $scriptAction.Sequence = 650
         $scriptAction.Update()
 
@@ -103,7 +115,7 @@ try {
         $ribbonAction.Update()
 
         $context.ExecuteQuery()
-        Write-Host 'Classic-Ansicht: CSR/JSLink und Ribbon-Befehl wurden registriert.'
+        Write-Host 'Classic-Ansicht: Web-ScriptLink und listenspezifischer Ribbon-Befehl wurden registriert.'
     }
 
     Write-Host "ExpiryIndicator wurde für '$($list.Title)' an '$($field.InternalName)' gebunden."