return hash on post with binary eye

util-sqlpage/code/new.sql

@@ -6,5 +6,4 @@ UPDATE SET
   created = excluded.created,
   svg = excluded.svg
 WHERE excluded.created > code.created;
-SELECT 'text' AS component;
-SELECT $hash AS contents;
+SELECT 'json' AS component, json('"'||$hash||'"') AS contents;