refactor: fix warnings

lib/focus/focusable_chip_mixin.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 
 import 'dpad_navigator.dart';
 

lib/screens/discover_screen.dart

@@ -2,7 +2,6 @@ import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:plezy/widgets/app_icon.dart';
 import 'package:material_symbols_icons/symbols.dart';
-import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
 import '../focus/dpad_navigator.dart';
 import 'package:cached_network_image/cached_network_image.dart';

lib/screens/media_detail_screen.dart

@@ -1244,7 +1244,6 @@ class _MediaDetailScreenState extends State<MediaDetailScreen> {
 
     // Determine header height based on screen size
     final size = MediaQuery.of(context).size;
-    final isDesktop = size.width > 600;
     final headerHeight = size.height * 0.6;
 
     return Focus(

lib/widgets/hub_section.dart

@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:plezy/widgets/app_icon.dart';
 import 'package:material_symbols_icons/symbols.dart';
-import 'package:flutter/services.dart';
 import '../focus/dpad_navigator.dart';
 import '../theme/mono_tokens.dart';
 import '../utils/layout_constants.dart';

lib/widgets/media_card.dart

@@ -3,7 +3,6 @@ import 'package:plezy/utils/content_utils.dart';
 import 'package:plezy/widgets/app_icon.dart';
 import 'package:material_symbols_icons/symbols.dart';
 import 'package:provider/provider.dart';
-import '../../services/plex_client.dart';
 import '../models/plex_metadata.dart';
 import '../models/plex_playlist.dart';
 import '../providers/download_provider.dart';

lib/widgets/video_controls/video_controls.dart

@@ -9,10 +9,7 @@ import 'package:flutter/services.dart'
     show
         SystemChrome,
         DeviceOrientation,
-        LogicalKeyboardKey,
-        KeyEvent,
-        KeyDownEvent,
-        KeyRepeatEvent;
+        LogicalKeyboardKey;
 import 'package:macos_window_utils/macos_window_utils.dart';
 import 'package:window_manager/window_manager.dart';
 
@@ -1216,6 +1213,7 @@ class _PlexVideoControlsState extends State<PlexVideoControls>
           ],
         ),
       ),
+    ),
     );
   }