pos changes

lib/data/local/order_dao.dart

@@ -303,20 +303,27 @@ class OrderDao {
     return rows.isEmpty ? null : rows.first;
   }
 
-  Future<List<Map<String, Object?>>> syncRows({int limit = 200}) => _db.query(
-        Tables.orders,
-        columns: [
-          'id',
-          'invoice_number',
-          'total',
-          'created_at',
-          'sync_status',
-          'synced_at',
-          'sync_attempts',
-          'sync_error',
-        ],
-        orderBy: 'created_at DESC',
-        limit: limit,
+  /// Rows for the sync log, with each bill's unit count folded in.
+  ///
+  /// The count comes from a correlated sum over [Tables.orderItems] rather
+  /// than a column on the order: quantity can be fractional (loose weight), so
+  /// there is no line count that answers "how many units were on this bill".
+  /// A single aggregate keeps this to one query rather than one per row.
+  Future<List<Map<String, Object?>>> syncRows({int limit = 200}) =>
+      _db.rawQuery(
+        '''
+        SELECT o.id, o.invoice_number, o.total, o.created_at, o.sync_status,
+               o.synced_at, o.sync_attempts, o.sync_error,
+               COALESCE(
+                 (SELECT SUM(i.quantity) FROM ${Tables.orderItems} i
+                   WHERE i.order_id = o.id),
+                 0
+               ) AS item_count
+        FROM ${Tables.orders} o
+        ORDER BY o.created_at DESC
+        LIMIT ?
+        ''',
+        [limit],
       );
 
   // ----------------------------------------------------------------- Sync