fix feed initial balance and report button

backend/apps/farms/views.py

@@ -10,6 +10,10 @@ from apps.accounts.models import User
 from apps.farms.models import Cycle, Flock, Kandang, Site
 from apps.farms.serializers import CycleSerializer, FlockSerializer, KandangSerializer, SiteSerializer
 from apps.operations.models import FeedSacks, ManualInput
+from apps.operations.services.feed_sacks import (
+    ensure_opening_feed_sack_snapshot,
+    recompute_feed_sack_in_totals,
+)
 from apps.operations.services.karung_web import KarungWebError, request_karung
 from apps.operations.services.manual_input import recompute_manual_totals
 
@@ -145,12 +149,8 @@ class CycleViewSet(viewsets.ModelViewSet):
         recompute_manual_totals(cycle)
 
         # FeedSacks in_total always includes the initial balance as its base.
-        running = cycle.feed_initial_balance
-        for fs_row in FeedSacks.objects.filter(cycle=cycle).order_by("date", "pk"):
-            running += fs_row.in_today
-            if fs_row.in_total != running:
-                fs_row.in_total = running
-                fs_row.save(update_fields=["in_total", "updated_at"])
+        recompute_feed_sack_in_totals(cycle)
+        ensure_opening_feed_sack_snapshot(cycle, balance_date)
 
         accuracy = None
         if feed_in_manual > 0 and iot_in is not None and iot_in > 0: