fix: Analyzer bugs

lib/pages/archive.dart

@@ -16,7 +16,7 @@ class ArchiveController extends State<Archive> {
 
   Future<List<Room>> getArchive(BuildContext context) async {
     if (archive != null) return archive;
-    return await Matrix.of(context).client.archive;
+    return await Matrix.of(context).client.loadArchive();
   }
 
   void forgetAction(int i) => setState(() => archive.removeAt(i));

lib/utils/matrix_sdk_extensions.dart/event_extension.dart

@@ -80,7 +80,7 @@ extension LocalizedBody on Event {
       return true;
     }
     // check if the url is cached
-    final url = Uri.parse(mxcUrl).getDownloadLink(room.client);
+    final url = mxcUrl.getDownloadLink(room.client);
     final file = await DefaultCacheManager().getFileFromCache(url.toString());
     return file != null;
   }
@@ -88,7 +88,7 @@ extension LocalizedBody on Event {
   Future<MatrixFile> downloadAndDecryptAttachmentCached(
       {bool getThumbnail = false}) async {
     final mxcUrl = attachmentOrThumbnailMxcUrl(getThumbnail: getThumbnail);
-    _downloadAndDecryptFutures[mxcUrl] ??= downloadAndDecryptAttachment(
+    _downloadAndDecryptFutures[mxcUrl.toString()] ??= downloadAndDecryptAttachment(
       getThumbnail: getThumbnail,
       downloadCallback: (Uri url) async {
         final file = await DefaultCacheManager().getSingleFile(url.toString());

lib/utils/matrix_sdk_extensions.dart/flutter_matrix_hive_database.dart

@@ -118,20 +118,22 @@ class FlutterMatrixHiveStore extends FamedlySdkHiveDatabase {
   }
 
   @override
-  Future<Uint8List> getFile(String mxcUri) async {
+  Future<Uint8List> getFile(Uri mxcUri) async {
     if (!supportsFileStoring) return null;
     final tempDirectory = await _getFileStoreDirectory();
-    final file = File('$tempDirectory/${Uri.encodeComponent(mxcUri)}');
+    final file =
+        File('$tempDirectory/${Uri.encodeComponent(mxcUri.toString())}');
     if (await file.exists() == false) return null;
     final bytes = await file.readAsBytes();
     return bytes;
   }
 
   @override
-  Future storeFile(String mxcUri, Uint8List bytes, int time) async {
+  Future storeFile(Uri mxcUri, Uint8List bytes, int time) async {
     if (!supportsFileStoring) return null;
     final tempDirectory = await _getFileStoreDirectory();
-    final file = File('$tempDirectory/${Uri.encodeComponent(mxcUri)}');
+    final file =
+        File('$tempDirectory/${Uri.encodeComponent(mxcUri.toString())}');
     if (await file.exists()) return;
     await file.writeAsBytes(bytes);
     return;

lib/utils/room_send_file_extension.dart

@@ -21,7 +21,7 @@ import 'package:matrix/matrix.dart';
 import 'resize_image.dart';
 
 extension RoomSendFileExtension on Room {
-  Future<String> sendFileEventWithThumbnail(
+  Future<Uri> sendFileEventWithThumbnail(
     MatrixFile file, {
     String txid,
     Event inReplyTo,

lib/widgets/event_content/image_bubble.dart

@@ -265,7 +265,8 @@ class _ImageBubbleState extends State<ImageBubble> {
         : widget.event.thumbnailMxcUrl;
     final mimetype = getMimetype(!isOriginal);
     if (_contentRenderers.containsKey(mimetype)) {
-      return _contentRenderers[mimetype].memory(_displayFile.bytes, key);
+      return _contentRenderers[mimetype]
+          .memory(_displayFile.bytes, key.toString());
     } else {
       return Image.memory(
         _displayFile.bytes,