fix: apply travel-day quantity rules

Use business-rule based daily quantity for travel expense calculations and cover it with regression tests.

backend/modules/fleet/views.py

@@ -196,6 +196,17 @@ def _parse_report_decimal_value(value):
         return Decimal('0.00')
 
 
+def _calculate_daily_quantity_from_hours(total_hours):
+    numeric = Decimal(str(total_hours)) if total_hours not in (None, '') else Decimal('0.00')
+    if numeric <= 0:
+        return 0.0
+    if numeric < Decimal('8'):
+        return 0.0
+    if numeric < Decimal('12'):
+        return 0.5
+    return 1.0
+
+
 def _task_work_hours_entries(task):
     table_data = getattr(getattr(task, 'work_hours_table', None), 'data', None)
     rows = table_data.get('rows', []) if isinstance(table_data, dict) else []
@@ -720,7 +731,7 @@ def _build_work_order_pdf(work_order):
         start_candidates = [entry['start_dt'] for entry in trip_entries if entry.get('start_dt')]
         end_candidates = [entry['end_dt'] for entry in trip_entries if entry.get('end_dt')]
         total_hours = sum((entry['total_hours'] for entry in trip_entries), Decimal('0.00'))
-        travel_hours = float(total_hours)
+        travel_hours = float(total_hours.quantize(Decimal('0.01')))
         if entry_dates:
             trip_start_date = min(entry_dates)
             trip_end_date = max(entry_dates)
@@ -729,7 +740,7 @@ def _build_work_order_pdf(work_order):
         if end_candidates:
             travel_end = max(end_candidates)
 
-    daily_qty = round(travel_hours / 24.0, 1) if travel_hours > 0 else 0.0
+    daily_qty = _calculate_daily_quantity_from_hours(travel_hours)
     daily_rate = 0.0
     daily_total = daily_qty * daily_rate
     transport_total = float(work_order.servicer_vehicle_fuel_cost or 0.0)