feat: replace gblob with blob http transport (#1407)

ui/flutter/lib/api/model/task.dart

@@ -6,7 +6,7 @@ part 'task.g.dart';
 
 enum Status { ready, running, pause, wait, error, done }
 
-enum Protocol { http, bt, ed2k, gblob }
+enum Protocol { http, bt, ed2k }
 
 // ExtractStatus enum matching Go backend
 enum ExtractStatus {

ui/flutter/lib/api/model/task.g.dart

@@ -52,7 +52,6 @@ const _$ProtocolEnumMap = {
   Protocol.http: 'http',
   Protocol.bt: 'bt',
   Protocol.ed2k: 'ed2k',
-  Protocol.gblob: 'gblob',
 };
 
 Progress _$ProgressFromJson(Map<String, dynamic> json) => Progress(