fix empty feedback check

src/db/schema/feedback.ts

@@ -91,7 +91,7 @@ export async function getFeedbacks(db: Database, values: GetFeedbacksReq) {
     })
     .from(feedback)
     .leftJoin(user, eq(feedback.userId, user.id))
-    .where(!values.includeBlanks ? isNotNull(feedback.lastChanged) : undefined)
+    .where(!values.includeBlanks ? isNotNull(feedback.content) : undefined)
     .orderBy(desc(feedback.id));
 }