Resolve "[MIN-114] Browse comments on the map"

Closes #68 (closed)

src/models/commentSchema.ts

@@ -16,5 +16,5 @@ export const commentSchema = z.object({
   elementId: z.string(),
   id: z.number(),
   pinned: z.boolean(),
-  owner: z.string().optional(),
+  owner: z.string().nullable().optional(),
 });