fix: fixed the registration issue.

Author: Sahil2004

infrastructure/eid-wallet/src/routes/(app)/main/+page.svelte

@@ -542,17 +542,20 @@ const scanFABVisible = $derived(tourStep === null || tourStep === "scan");
 // during earlier steps, and after FINISH.
 $effect(() => {
     if (typeof window === "undefined") return;
-    if (tourStep !== "scan") {
-        scanFABTop = restingScanFABTop();
+    const handleViewPortChange = () => {
+        if (tourStep !== "scan") {
+            scanFABTop = restingScanFABTop();
+        }
     }
+    handleViewPortChange()
     // Attach listeners for both orientation change and general window resize
-    window.addEventListener("orientationchange", () => scanFABTop = restingScanFABTop());
-    window.addEventListener("resize", () => scanFABTop = restingScanFABTop());
+    window.addEventListener("orientationchange", handleViewPortChange);
+    window.addEventListener("resize", handleViewPortChange);
 
     // Clean up event listeners when the component is unmounted
     return () => {
-      window.removeEventListener("orientationchange", () => scanFABTop = restingScanFABTop());
-      window.removeEventListener("resize", () => scanFABTop = restingScanFABTop());
+      window.removeEventListener("orientationchange", handleViewPortChange);
+      window.removeEventListener("resize", handleViewPortChange);
     };
 });