fix: 修正共享报工段工时归属拆分

app/services/metrics.py

@@ -35,6 +35,7 @@ class ItemTimeRange:
     item: ReportItemLike
     start_at: datetime
     end_at: datetime
+    allocation_weight: float = 1.0
 
 
 SHIFT_BUCKETS = ("day", "overtime", "night")
@@ -419,8 +420,17 @@ def _device_item_time_ranges(
         item_end = segment_end
         if index + 1 < len(ordered_starts):
             item_end = ordered_starts[index + 1]
-        for item in grouped_items[item_start]:
-            ranges.append(ItemTimeRange(item=item, start_at=item_start, end_at=item_end))
+        items_at_start = grouped_items[item_start]
+        allocation_weight = 1 / len(items_at_start)
+        for item in items_at_start:
+            ranges.append(
+                ItemTimeRange(
+                    item=item,
+                    start_at=item_start,
+                    end_at=item_end,
+                    allocation_weight=allocation_weight,
+                )
+            )
     return ranges
 
 
@@ -435,7 +445,11 @@ def item_time_ranges(
 
     segment_ranges = _device_segment_ranges(start_at, end_at, devices)
     if not segment_ranges:
-        return [ItemTimeRange(item=item, start_at=start_at, end_at=end_at) for item in items]
+        allocation_weight = 1 / len(items)
+        return [
+            ItemTimeRange(item=item, start_at=start_at, end_at=end_at, allocation_weight=allocation_weight)
+            for item in items
+        ]
 
     items_by_device: dict[str, list[ReportItemLike]] = defaultdict(list)
     for item in items:

app/services/report_allocations.py

@@ -188,7 +188,9 @@ def build_report_allocation_drafts(report, schedule: WorkScheduleConfig | None =
         target = minutes_by_item.setdefault(item_key, defaultdict(lambda: {key: 0.0 for key in SHIFT_BUCKETS}))
         for allocation_date, minutes in _range_allocation_minutes(item_range.start_at, item_range.end_at, schedule).items():
             for key in SHIFT_BUCKETS:
-                target[allocation_date][key] += minutes.get(key, 0.0)
+                target[allocation_date][key] += minutes.get(key, 0.0) * as_float(
+                    getattr(item_range, "allocation_weight", 1.0)
+                )
 
     rows: list[ReportAllocationDraft] = []
     for item in items: