fix: restore monthly archive download exports

Re-add missing monthly archive export functions in fleetDashboardStore used by TaskCalendarWidget so the frontend Docker build resolves imports and starts cleanly.

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

frontend/src/stores/fleetDashboardStore.js

@@ -1021,6 +1021,40 @@ export async function downloadMonthlyCostsReport(year, month) {
     }
 }
 
+export async function downloadMonthlyServiceTasksArchive(year, month) {
+    try {
+        const payload = await api.post('fleet/reports/monthly-service-tasks-archive-request/', { year, month });
+        await _refreshNotificationsAsync();
+        if (payload?.status === 'ready' && payload?.download_url) {
+            showToast('ZIP arhiva servisnih taskova je spremna. Preuzmite je kroz notifikaciju.', 'success');
+            return payload;
+        }
+        showToast('ZIP arhiva servisnih taskova se generira u pozadini. Preuzimanje je dostupno kroz notifikaciju.', 'info');
+        _schedulePdfNotificationPolling();
+        return payload;
+    } catch (err) {
+        showToast(err?.message || 'Pokretanje generiranja ZIP arhive servisnih taskova nije uspjelo.', 'error');
+        throw err;
+    }
+}
+
+export async function downloadMonthlyWorkOrdersArchive(year, month) {
+    try {
+        const payload = await api.post('fleet/reports/monthly-work-orders-archive-request/', { year, month });
+        await _refreshNotificationsAsync();
+        if (payload?.status === 'ready' && payload?.download_url) {
+            showToast('ZIP arhiva putnih naloga je spremna. Preuzmite je kroz notifikaciju.', 'success');
+            return payload;
+        }
+        showToast('ZIP arhiva putnih naloga se generira u pozadini. Preuzimanje je dostupno kroz notifikaciju.', 'info');
+        _schedulePdfNotificationPolling();
+        return payload;
+    } catch (err) {
+        showToast(err?.message || 'Pokretanje generiranja ZIP arhive putnih naloga nije uspjelo.', 'error');
+        throw err;
+    }
+}
+
 export async function downloadGeneratedPdfByUrl(downloadUrl, filename = 'document.pdf') {
     if (!downloadUrl) {
         showToast('Nedostaje URL za preuzimanje PDF-a.', 'error');