fix: 统一报工归属金额舍入

tests/test_report_allocations.py

@@ -230,6 +230,26 @@ def test_item_split_fields_keep_original_totals_after_rounding_residual():
     assert round(sum(row.reference_wage for row in rows), 2) == 1
 
 
+def test_reference_wage_uses_half_up_rounding_for_allocation_totals():
+    item = _item(good_qty=115, process_unit_price_yuan=Decimal("0.867"))
+    report = _report(datetime(2026, 7, 25, 8, 0), datetime(2026, 7, 25, 10, 0), item)
+
+    rows = build_report_allocation_drafts(report)
+
+    assert len(rows) == 1
+    assert rows[0].reference_wage == 99.71
+
+
+def test_split_reference_wage_residual_keeps_half_up_item_total():
+    item = _item(good_qty=115, process_unit_price_yuan=Decimal("0.867"))
+    report = _report(datetime(2026, 7, 25, 0, 10), datetime(2026, 7, 25, 11, 0), item)
+
+    rows = build_report_allocation_drafts(report)
+
+    assert [row.allocation_date for row in rows] == [date(2026, 7, 24), date(2026, 7, 25)]
+    assert round(sum(row.reference_wage for row in rows), 2) == 99.71
+
+
 def test_items_sharing_same_started_at_split_the_segment_minutes():
     started_at = datetime(2026, 7, 25, 8, 0)
     first_item = _item(id=1, good_qty=10, started_at=started_at)