fix: premjesti kalendar widget u Layout, popravi PDF toast i Servisi danas

- TaskCalendarPortal u Layout.astro (van AnimatedPage transforma) pa fixed
  pozicija uvijek prati viewport rub bez probijanja sadržaja
- Kalendar widgeta panel koristi clipping wrapper (overflow:hidden + animirana
  width) umjesto translate3d — potpuno skriva sjenu i border kad je zatvoren
- Serviser vidi samo svoje taskove, supervisor vidi sve; neprijavljeni korisnik
  ne vidi widget (return null)
- FleetDashboardShell sluša calendar:open-task event i otvara TaskServiceRecordsModal
- Servisi danas broji Taskove (scheduled_date=danas, status aktivan/servis)
  umjesto Servisnih zapisa
- downloadGeneratedPdfByUrl hvata grešku i prikazuje Toast (npr. PDF nije
  dostupan ili je istekao)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

frontend/src/components/dashboard/FleetDashboardShell.jsx

@@ -6,7 +6,6 @@ import WorkOrderModal from './WorkOrderModal';
 import TaskCreateModal from './TaskCreateModal';
 import TaskServiceRecordsModal from './TaskServiceRecordsModal';
 import WorkOrderDetailModal from './WorkOrderDetailModal';
-import TaskCalendarWidget from './TaskCalendarWidget';
 import SyncLogPanel from './SyncLogPanel';
 import ServiceRecordForm from '../fleet/ServiceRecordForm';
 import ServicePhotoUpload from '../fleet/ServicePhotoUpload';
@@ -145,6 +144,15 @@ export default function FleetDashboardShell({ initialSection = 'dashboard', page
         hydrateServiceContext();
     }, []);
 
+    useEffect(() => {
+        function onCalendarOpenTask(event) {
+            const task = event?.detail?.task;
+            if (task) setSelectedTask(task);
+        }
+        window.addEventListener('calendar:open-task', onCalendarOpenTask);
+        return () => window.removeEventListener('calendar:open-task', onCalendarOpenTask);
+    }, []);
+
     useEffect(() => {
         const nextSection = String(resolvedInitialSection || 'dashboard');
         setActiveSection(nextSection);
@@ -593,12 +601,6 @@ export default function FleetDashboardShell({ initialSection = 'dashboard', page
 
     return (
         <AnimatedPage className="min-h-screen">
-            {hasMounted && (
-                <TaskCalendarWidget
-                    tasks={tasks}
-                    onTaskClick={(task) => setSelectedTask(task)}
-                />
-            )}
             <main className="min-w-0">
                 <DashboardTopbar
                     activeSection={activeSection}