feat: implement success page and update routing; add lucide icons and enhance form submission feedback

frontend/src/pages/MainForm.tsx

@@ -78,7 +78,7 @@ export const MainForm = () => {
   const confirmUser = async (selectedUser: string) => {
     try {
       const response = await fetch(
-        `http://localhost:8004/default/confirm-user?username=${selectedUser}`
+        `http://localhost:8004/default/confirm-user?username=${selectedUser}`,
       );
       const data = await response.json();
       setNextID(data.nextID);
@@ -99,11 +99,7 @@ export const MainForm = () => {
     try {
       const result = await submitFormData(formData, selectedUser || "");
       if (result.success) {
-        setMsg({
-          type: "success",
-          headline: t("success"),
-          text: t("form-submitted-successfully"),
-        });
+        document.location.href = `/success?id=${nextID}&tickets=${formData.tickets}`;
       } else {
         setMsg({
           type: "error",