Enrich alltime_projects context with working_days + avg_per_working_day

Chapter I of the executive report needs per-project working-day count and
avg rand per working day. Instead of modifying the shared _get_labour_costs
helper (used by other sections with different column sets), enrich the
output INSIDE _build_report_context: wrap the raw result and add
working_days (distinct work-log dates per project) and avg_per_working_day
(total_cost / working_days, null-safe).

Also attaches start_date from the Project model (may be None if not set).

1 test added.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

core/tests.py

@@ -668,3 +668,27 @@ class TeamProjectActivityTests(TestCase):
         r = _team_project_activity(self.logs_qs)
         team_names = [row['team_name'] for row in r['rows']]
         self.assertNotIn('GhostTeam', team_names)
+
+
+class ChapterOneEnrichmentTests(TestCase):
+    """Chapter I — All Time Projects gains working_days and avg_per_working_day."""
+
+    def test_alltime_projects_includes_working_days_and_avg(self):
+        from core.views import _build_report_context
+        admin = User.objects.create_user(username='c1', is_staff=True)
+        proj = Project.objects.create(name='C1', start_date=datetime.date(2026, 1, 1))
+        w = Worker.objects.create(name='W', id_number='W1', monthly_salary=Decimal('4000'))
+        # 4 distinct dates, 1 worker each; daily_rate=200; total = R 800; working_days=4; avg=200
+        for d in (1, 2, 3, 4):
+            log = WorkLog.objects.create(
+                date=datetime.date(2026, 3, d), project=proj, supervisor=admin,
+            )
+            log.workers.add(w)
+        ctx = _build_report_context(
+            datetime.date(2026, 1, 1), datetime.date(2026, 12, 31),
+        )
+        by_name = {p['project']: p for p in ctx['alltime_projects']}
+        self.assertIn('C1', by_name)
+        self.assertEqual(by_name['C1']['working_days'], 4)
+        self.assertEqual(by_name['C1']['avg_per_working_day'], Decimal('200.00'))
+        self.assertEqual(by_name['C1']['start_date'], datetime.date(2026, 1, 1))

core/views.py

@@ -2114,7 +2114,36 @@ def _build_report_context(start_date, end_date, project_id=None, team_id=None):
         all_time_logs = all_time_logs.filter(project_id=project_id)
     if team_id:
         all_time_logs = all_time_logs.filter(team_id=team_id)
-    alltime_projects = _get_labour_costs(all_time_logs, 'project__name', 'project')
+    # === CHAPTER I — All Time Projects (enriched) ===
+    # Adds working_days and avg_per_working_day (the 2026-04-23 design).
+    # Can't just extend _get_labour_costs because that helper is used by
+    # other sections with different columns. Wrap it here instead.
+    alltime_projects_raw = _get_labour_costs(all_time_logs, 'project__name', 'project')
+    # Build a lookup of working_days per project (distinct work-log dates)
+    project_working_days = dict(
+        all_time_logs.filter(project__isnull=False)
+        .values('project_id', 'project__name')
+        .annotate(days=Count('date', distinct=True))
+        .values_list('project__name', 'days')
+    )
+    # Lookup project start_date from the Project model (authoritative source)
+    start_dates = dict(
+        Project.objects.values_list('name', 'start_date')
+    )
+    alltime_projects = []
+    for row in alltime_projects_raw:
+        name = row['project']
+        wdays = project_working_days.get(name, 0)
+        total = row['total'] or Decimal('0.00')
+        avg = (total / wdays).quantize(Decimal('0.01')) if wdays else Decimal('0.00')
+        alltime_projects.append({
+            'project': name,
+            'worker_days': row['worker_days'],
+            'total': total,
+            'start_date': start_dates.get(name),   # may be None
+            'working_days': wdays,
+            'avg_per_working_day': avg,
+        })
     alltime_teams = _get_labour_costs(
         all_time_logs.filter(team__isnull=False), 'team__name', 'team'
     )