chore: Follow up file download type fix

lib/utils/matrix_sdk_extensions/event_extension.dart

@@ -1,3 +1,5 @@
+import 'dart:developer';
+
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
@@ -22,6 +24,7 @@ extension LocalizedBody on Event {
 
   void shareFile(BuildContext context) async {
     final matrixFile = await _getFile(context);
+    inspect(matrixFile);
 
     matrixFile.result?.share(context);
   }

lib/utils/matrix_sdk_extensions/matrix_file_extension.dart

@@ -73,7 +73,7 @@ extension MatrixFileExtension on MatrixFile {
       href: html.Url.createObjectUrlFromBlob(
         html.Blob(
           [bytes],
-          'application/octet-stream',
+          mimeType,
         ),
       ),
     )
@@ -87,7 +87,7 @@ extension MatrixFileExtension on MatrixFile {
     final box = context.findRenderObject() as RenderBox?;
 
     await Share.shareXFiles(
-      [XFile.fromData(bytes)],
+      [XFile.fromData(bytes, name: name, mimeType: mimeType)],
       sharePositionOrigin:
           box == null ? null : box.localToGlobal(Offset.zero) & box.size,
     );