[bugfix] Don't nil emojis + fields on blocked accounts (#2968)

* [bugfix] Don't nil emojis + fields on blocked accounts

* comment

* swagger

internal/typeutils/internaltofrontend.go

@@ -368,6 +368,10 @@ func (c *Converter) AccountToAPIAccountBlocked(ctx context.Context, a *gtsmodel.
 		Bot:       *a.Bot,
 		CreatedAt: util.FormatISO8601(a.CreatedAt),
 		URL:       a.URL,
+		// Empty array (not nillable).
+		Emojis: make([]apimodel.Emoji, 0),
+		// Empty array (not nillable).
+		Fields:    make([]apimodel.Field, 0),
 		Suspended: !a.SuspendedAt.IsZero(),
 		Role:      role,
 	}

internal/typeutils/internaltofrontend_test.go

@@ -420,8 +420,8 @@ func (suite *InternalToFrontendTestSuite) TestLocalInstanceAccountToFrontendBloc
   "following_count": 0,
   "statuses_count": 0,
   "last_status_at": null,
-  "emojis": null,
-  "fields": null
+  "emojis": [],
+  "fields": []
 }`, string(b))
 }