Fix MySQL no-op update returning account not found in SaveAccountSettings

management/server/store/sql_store.go

@@ -4077,9 +4077,10 @@ func (s *SqlStore) SaveAccountSettings(ctx context.Context, accountID string, se
 		return status.Errorf(status.Internal, "failed to save account settings to store")
 	}
 
-	if result.RowsAffected == 0 {
-		return status.NewAccountNotFoundError(accountID)
-	}
+	// MySQL reports RowsAffected=0 for no-op updates where values don't change,
+	// unlike SQLite/Postgres which report matched rows. Skip the check since the
+	// caller (UpdateAccountSettings) already verified the account exists via
+	// GetAccountSettings with LockingStrengthUpdate.
 
 	return nil
 }