Fixed small issue when not using $state on variables

src/routes/+layout.svelte

@@ -22,6 +22,10 @@
     {
     Path: "/test2",
     Name: "test2",
+    },
+    {
+    Path: "/card",
+    Name: "Cards",
     }
   ]
 </script>

src/routes/card/+page.svelte

@@ -5,12 +5,12 @@
   let cards: Card[] = $state([]);
   let error: string | null = $state(null);
   let editingCard: Card | null = $state(null);
-  let newCard: Partial<Card> = {
+  let newCard: Partial<Card> = $state({
     balance: 0,
     credit_line: 0,
     have_credit_line: false,
     name: "",
-  };
+  });
 
   // Fetch all cards on page load
   onMount(async () => {
@@ -18,7 +18,7 @@
   });
 
   async function fetchCards() {
-    const result = await fetch("/api/card/all", { credentials: "same-origin" });
+    const result = await fetch("/api/card/all");
     if (!result.ok) {
       const obj = await result.json();
       error = obj.message;