Fix calendar detail showing all workers when filtering by one

When filtering by a single worker, log.workers.all() still returned
every worker on the WorkLog. Now the detail panel and cost calculation
only show the filtered worker, not the entire group.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/views.py

@@ -496,13 +496,27 @@ def work_history(request):
         # the JS reads this JSON to populate the detail panel below the calendar.
         # NOTE: Pass raw Python dict, not json.dumps() — the template's
         # |json_script filter handles serialization.
+        #
+        # IMPORTANT: When a worker filter is active, log.workers.all() would
+        # still return ALL workers on that WorkLog (not just the filtered one).
+        # We need to narrow the displayed workers to match the filter.
         calendar_detail = {}
         for date_key, day_logs in logs_by_date.items():
             calendar_detail[date_key] = []
             for log in day_logs:
+                # Get the workers to show — if filtering by worker,
+                # only show that worker (not everyone else on the log)
+                if worker_filter:
+                    display_workers = [
+                        w for w in log.workers.all()
+                        if str(w.id) == worker_filter
+                    ]
+                else:
+                    display_workers = list(log.workers.all())
+
                 entry = {
                     'project': log.project.name,
-                    'workers': [w.name for w in log.workers.all()],
+                    'workers': [w.name for w in display_workers],
                     'supervisor': (
                         log.supervisor.get_full_name() or log.supervisor.username
                     ) if log.supervisor else '-',
@@ -510,10 +524,10 @@ def work_history(request):
                     'is_paid': log.payroll_records.exists(),
                     'overtime': log.get_overtime_amount_display() if log.overtime_amount > 0 else '',
                 }
-                # Only show cost data to admins
+                # Only show cost data to admins — use filtered workers for amount
                 if is_admin(user):
                     entry['amount'] = float(
-                        sum(w.daily_rate for w in log.workers.all())
+                        sum(w.daily_rate for w in display_workers)
                     )
                 calendar_detail[date_key].append(entry)