fix warnings

lib/utils/plex_image_helper.dart

@@ -1,5 +1,4 @@
 import 'dart:math';
-import 'dart:ui';
 import 'package:flutter/widgets.dart';
 import '../services/plex_client.dart';
 import 'plex_url_helper.dart';

lib/widgets/download_tree_view.dart

@@ -551,8 +551,9 @@ class _DownloadTreeItemState extends State<_DownloadTreeItem> {
     if ((status == DownloadStatus.downloading || status == DownloadStatus.queued) && widget.onCancel != null) count++;
     if (status == DownloadStatus.failed && widget.onRetry != null) count++;
     if ((status == DownloadStatus.completed || status == DownloadStatus.failed || status == DownloadStatus.cancelled) &&
-        widget.onDelete != null)
+        widget.onDelete != null) {
       count++;
+    }
     return count;
   }
 

lib/widgets/hotkey_recorder.dart

@@ -87,7 +87,7 @@ class _VirtualKeyView extends StatelessWidget {
         color: Theme.of(context).canvasColor,
         border: Border.all(color: Theme.of(context).dividerColor),
         borderRadius: BorderRadius.circular(3),
-        boxShadow: <BoxShadow>[BoxShadow(color: Colors.black.withOpacity(0.3), offset: const Offset(0.0, 1.0))],
+        boxShadow: <BoxShadow>[BoxShadow(color: Colors.black.withValues(alpha: 0.3), offset: const Offset(0.0, 1.0))],
       ),
       child: Text(keyLabel, style: TextStyle(color: Theme.of(context).textTheme.bodyMedium?.color, fontSize: 12)),
     );