fix(reports): throttle export actions after queueing

src/pages/Reports.tsx

@@ -96,6 +96,10 @@ export default function Reports() {
   const [dayDetails, setDayDetails] = useState<DayDetailsResponse | null>(null);
   const [openDay, setOpenDay] = useState<string | null>(null);
   const [isLoading, setIsLoading] = useState(false);
+  const [exportState, setExportState] = useState({
+    excel: { pending: false, cooldownSeconds: 0 },
+    pdf: { pending: false, cooldownSeconds: 0 },
+  });
 
   const canSelectUsers = canWorkspace(activeWorkspace?.my_role, WORKSPACE_MEMBERS_VIEW);
 
@@ -188,12 +192,44 @@ export default function Reports() {
     }
   };
 
+  useEffect(() => {
+    const interval = window.setInterval(() => {
+      setExportState((current) => ({
+        excel: {
+          pending: current.excel.pending,
+          cooldownSeconds: Math.max(current.excel.cooldownSeconds - 1, 0),
+        },
+        pdf: {
+          pending: current.pdf.pending,
+          cooldownSeconds: Math.max(current.pdf.cooldownSeconds - 1, 0),
+        },
+      }));
+    }, 1000);
+
+    return () => window.clearInterval(interval);
+  }, []);
+
   const handleExport = async (type: "excel" | "pdf") => {
     if (!apiFilters) return;
+    if (exportState[type].pending || exportState[type].cooldownSeconds > 0) return;
+
+    setExportState((current) => ({
+      ...current,
+      [type]: { pending: true, cooldownSeconds: 0 },
+    }));
+
     try {
       await createReportExport(apiFilters, type, lang);
+      setExportState((current) => ({
+        ...current,
+        [type]: { pending: false, cooldownSeconds: 60 },
+      }));
       toast.success(t.reports?.exportQueued || "Export queued. You will receive a notification with the download link.");
     } catch {
+      setExportState((current) => ({
+        ...current,
+        [type]: { pending: false, cooldownSeconds: 0 },
+      }));
       toast.error(t.reports?.exportError || "Failed to queue report export.");
     }
   };
@@ -310,6 +346,7 @@ export default function Reports() {
           openDay={openDay}
           onToggleDay={(day) => void handleToggleDay(day)}
           onExport={(type) => void handleExport(type)}
+          exportState={exportState}
           labels={{
             exportExcel: t.reports?.exportExcel || "Export Excel",
             exportPdf: t.reports?.exportPdf || "Export PDF",