fix: 按指标结果校准归属工时

tests/test_report_allocations.py

@@ -297,6 +297,42 @@ def test_matched_meal_split_and_unmatched_device_range_follow_metrics_order():
     assert round(sum(row.effective_minutes for row in rows), 2) == metrics["effective_minutes"]
 
 
+def test_item_totals_anchor_to_metrics_when_unmatched_remaining_buckets_exceed_item_target():
+    start_at = datetime(2026, 7, 25, 8, 0)
+    second_started_at = datetime(2026, 7, 25, 12, 0)
+    switch_at = datetime(2026, 7, 25, 18, 0)
+    end_at = datetime(2026, 7, 25, 20, 0)
+    devices = [
+        _device(start_at, device_no="23#", sort_order=0),
+        _device(switch_at, device_no="77#", sort_order=1),
+    ]
+    first_item = _item(id=1, good_qty=240, device_no="23#", started_at=start_at)
+    second_item = _item(id=2, good_qty=360, device_no="23#", started_at=second_started_at)
+    unmatched_item = _item(id=3, good_qty=60, device_no="99#")
+    items = [first_item, second_item, unmatched_item]
+    report = _report(start_at, end_at, items, devices=devices)
+
+    metrics = calculate_report_metrics(start_at, end_at, items, devices=devices)
+    rows = build_report_allocation_drafts(report)
+
+    assert metrics["effective_minutes"] == 660
+    assert {item.id: item.allocated_minutes for item in items} == {
+        1: 240,
+        2: 360,
+        3: 60,
+    }
+    assert {
+        item_id: round(sum(row.effective_minutes for row in rows if row.report_item_id == item_id), 2)
+        for item_id in [1, 2, 3]
+    } == {
+        1: 240,
+        2: 360,
+        3: 60,
+    }
+    assert round(sum(row.effective_minutes for row in rows), 2) == 660
+    assert all(row.effective_minutes == row.day_minutes + row.overtime_minutes + row.night_minutes for row in rows)
+
+
 def test_zero_effective_minutes_falls_back_to_original_report_date():
     item = _item(good_qty=5, defect_qty=1, scrap_qty=0.5, changeover_count=2, process_unit_price_yuan=3)
     report = _report(