fix: prikaži shared putne naloge u kontekstu i filtriraj zatvorene u dropdownu

- scopedWorkOrders: u context modu uključi i putne naloge koji su dodijeljeni
  taskovima kontekstne dizalice (cross-crane shared WO), a ne samo one čiji
  vehicle === hydratedSelectedVehicleId
- selectedTaskWorkOrders: prikaži samo otvorene naloge (status != closed)
  u dropdownu za dodjelu putnog naloga tasku
- Ažuriran emptyMessage tablice da sugerira prebacivanje na 'svi nalozi'

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

frontend/src/components/dashboard/FleetDashboardShell.jsx

@@ -423,8 +423,19 @@ export default function FleetDashboardShell({ initialSection = 'dashboard', page
         if (!hydratedSelectedVehicleId) {
             return [];
         }
-        return codeSorted.filter((order) => String(order.vehicle) === String(hydratedSelectedVehicleId));
+        // Collect work order IDs that are directly assigned to tasks of the context crane.
-    }, [workOrders, workOrderScope, hydratedSelectedVehicleId, user?.id, user?.is_serviser, user?.is_team_member, workOrderCodeSortDirection]);
+        // This covers cross-crane shared work orders: a WO created for crane A can be
+        // assigned to a task of crane B — it should still appear in crane B's context view.
+        const contextTaskWorkOrderIds = new Set(
+            tasks
+                .filter((t) => String(t.vehicle || '') === String(hydratedSelectedVehicleId) && t.work_order)
+                .map((t) => String(t.work_order))
+        );
+        return codeSorted.filter(
+            (order) => String(order.vehicle) === String(hydratedSelectedVehicleId)
+                || contextTaskWorkOrderIds.has(String(order.id))
+        );
+    }, [workOrders, tasks, workOrderScope, hydratedSelectedVehicleId, user?.id, user?.is_serviser, user?.is_team_member, workOrderCodeSortDirection]);
     const pageSize = 10;
     const totalPages = Math.max(1, Math.ceil(scopedWorkOrders.length / pageSize));
     const latestWorkOrders = useMemo(
@@ -541,8 +552,11 @@ export default function FleetDashboardShell({ initialSection = 'dashboard', page
     }, [serviceRecords, selectedTask?.id]);
     const selectedTaskWorkOrders = useMemo(() => {
         if (!selectedTask) return [];
-        // Show ALL work orders — cross-crane sharing is allowed so no vehicle filter.
+        // Only open work orders in the dropdown — closed ones cannot receive new tasks.
-        return [...workOrders].sort((a, b) => String(b.date || '').localeCompare(String(a.date || '')));
+        // Cross-crane sharing allowed: no vehicle filter.
+        return [...workOrders]
+            .filter((order) => String(order.status || '').toLowerCase() !== 'closed')
+            .sort((a, b) => String(b.date || '').localeCompare(String(a.date || '')));
     }, [selectedTask, workOrders]);
 
     useEffect(() => {
@@ -945,7 +959,7 @@ export default function FleetDashboardShell({ initialSection = 'dashboard', page
                                 workOrderScope === 'context'
                                     ? (!hydratedSelectedVehicleId
                                         ? 'Odaberite dizalicu za prikaz putnih naloga iz servisnog konteksta.'
-                                        : 'Nema dostupnih putnih naloga za odabrani servisni kontekst.')
+                                        : 'Nema dostupnih putnih naloga za odabrani servisni kontekst. Možete prebaciti na prikaz svih naloga.')
                                     : 'Nema dostupnih putnih naloga.'
                             }
                             renderRow={(workOrder) => (