Replace async IIFE with onMounted for page initialization (S7785)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/views/Discover/Performance/PerformancePage.vue

@@ -270,7 +270,7 @@ export default {
 };
 </script>
 <script setup>
-import { ref } from "vue";
+import { ref, onMounted } from "vue";
 import { useRoute } from "vue-router";
 import { storeToRefs } from "pinia";
 import moment from "moment";
@@ -1049,8 +1049,7 @@ function getAvgWaitingTimeLineChart(chartData, content, yUnit) {
   return [primeVueSetData, primeVueSetOption];
 }
 
-// Created logic
-(async () => {
+onMounted(async () => {
   isLoading.value = true;
   try {
     const routeParams = route.params;
@@ -1138,7 +1137,7 @@ function getAvgWaitingTimeLineChart(chartData, content, yUnit) {
   } finally {
     isLoading.value = false;
   }
-})();
+});
 </script>
 <style scoped>
 @reference "../../../assets/tailwind.css";