Added export button, but without any function

- The function comes later...

frontend/src/components/SubHeaderAdmin.tsx

@@ -1,10 +1,11 @@
-import React from "react";
-import { Sheet, WholeWord, Search, DatabaseZap } from "lucide-react";
+import React, { useEffect } from "react";
+import { Sheet, WholeWord, Search, DatabaseZap, FileDown } from "lucide-react";
 import { useState } from "react";
 import ImportGUI from "./ImportGUI";
 import Cookies from "js-cookie";
 import { removeSelection } from "../utils/tableActions";
 import DangerZone from "./DangerZone";
+import { myToast } from "../utils/toastify";
 
 type SubHeaderAdminProps = {
   setFiles: (files: File[]) => void;
@@ -22,6 +23,13 @@ const SubHeaderAdmin: React.FC<SubHeaderAdminProps> = ({
 }) => {
   const [showImport, setShowImport] = useState(false);
   const [showDanger, setShowDanger] = useState(false);
+  const [exporting, setExporting] = useState(false);
+
+  useEffect(() => {
+    if (exporting) {
+      myToast("Export in Bearbeitung...", "info");
+    }
+  }, [exporting]);
 
   return (
     <>
@@ -62,6 +70,17 @@ const SubHeaderAdmin: React.FC<SubHeaderAdminProps> = ({
               />
               <span className="whitespace-nowrap">Losnummern importieren</span>
             </button>
+            <button
+              onClick={() => setExporting(true)}
+              type="button"
+              className="group inline-flex items-center gap-2 rounded-md border border-gray-300 bg-white px-3.5 py-2 text-sm font-medium text-gray-700 shadow-sm transition hover:bg-gray-50 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-blue-500/60 focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50"
+            >
+              <FileDown
+                className="h-4 w-4 shrink-0 text-gray-500 transition group-hover:text-gray-600"
+                strokeWidth={1.75}
+              />
+              <span className="whitespace-nowrap">Losnummern exportieren</span>
+            </button>
             <button
               onClick={() => {
                 removeSelection(Cookies.get("token") || "");
@@ -99,9 +118,7 @@ const SubHeaderAdmin: React.FC<SubHeaderAdminProps> = ({
         />
       )}
 
-      {showDanger && (
-        <DangerZone onClose={() => setShowDanger(false)} />
-      )}
+      {showDanger && <DangerZone onClose={() => setShowDanger(false)} />}
     </>
   );
 };