fix: prikaži sve povezane dizalice i SN u tablici putnih naloga

Kada putni nalog dijele taskovi više dizalica, stupci DIZALICA i SN
u tablici Putni nalozi dizalica prikazuju sve uključene dizalice
odvojene s ' • ' umjesto samo one za koju je WO kreiran.

- Dodana workOrderSharedCranes mapa (workOrderId -> {vehicleId -> crane})
  izgrađena iz task.work_order + task.vehicle veza
- Render stupaca DIZALICA i SN koristi mapu ako postoje shared cranes,
  inače fallback na craneInfo s originalnog WO-a

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

frontend/src/components/dashboard/FleetDashboardShell.jsx

@@ -442,6 +442,20 @@ export default function FleetDashboardShell({ initialSection = 'dashboard', page
         () => scopedWorkOrders.slice((currentPage - 1) * pageSize, currentPage * pageSize),
         [scopedWorkOrders, currentPage]
     );
+
+    // Map: workOrderId → array of unique crane objects (own + cross-crane task links)
+    const workOrderSharedCranes = useMemo(() => {
+        const craneById = new Map(cranes.map((c) => [String(c.id), c]));
+        const map = new Map();
+        tasks.forEach((task) => {
+            if (!task.work_order || !task.vehicle) return;
+            const woId = String(task.work_order);
+            if (!map.has(woId)) map.set(woId, new Map());
+            const craneObj = craneById.get(String(task.vehicle));
+            if (craneObj) map.get(woId).set(String(task.vehicle), craneObj);
+        });
+        return map;
+    }, [tasks, cranes]);
     const serviceRecordWorkOrders = useMemo(() => {
         // Show ALL open work orders so a task can be linked to any work order regardless of crane.
         // Cross-crane sharing is intentional: a servicer may use one travel order for multiple cranes.
@@ -973,10 +987,30 @@ export default function FleetDashboardShell({ initialSection = 'dashboard', page
                                     <td
                                         className="px-4 py-3"
                                     >
-                                        {[workOrder.craneInfo?.make, workOrder.craneInfo?.model].filter(Boolean).join(' ') || workOrder.craneLabel || workOrder.craneInfo?.registration_number || `#${workOrder.crane || workOrder.vehicle}`}
+                                        {(() => {
+                                            const sharedCranes = workOrderSharedCranes.get(String(workOrder.id));
+                                            if (sharedCranes && sharedCranes.size > 0) {
+                                                return [...sharedCranes.values()].map((c) => (
+                                                    [c.make, c.model].filter(Boolean).join(' ') || c.registration_number || `#${c.id}`
+                                                )).join(' • ');
+                                            }
+                                            return [workOrder.craneInfo?.make, workOrder.craneInfo?.model].filter(Boolean).join(' ')
+                                                || workOrder.craneLabel
+                                                || workOrder.craneInfo?.registration_number
+                                                || `#${workOrder.crane || workOrder.vehicle}`;
+                                        })()}
                                     </td>
                                     <td className="px-4 py-3 font-mono text-xs text-text-muted">
-                                        {workOrder.craneInfo?.crane_serial_number || '-'}
+                                        {(() => {
+                                            const sharedCranes = workOrderSharedCranes.get(String(workOrder.id));
+                                            if (sharedCranes && sharedCranes.size > 0) {
+                                                const sns = [...sharedCranes.values()]
+                                                    .map((c) => c.crane_serial_number)
+                                                    .filter(Boolean);
+                                                return sns.length > 0 ? sns.join(' • ') : '-';
+                                            }
+                                            return workOrder.craneInfo?.crane_serial_number || '-';
+                                        })()}
                                     </td>
                                     <td className="px-4 py-3">
                                         {formatDate(workOrder.date)}