implemented dynamic theme loading, working on user edit

frontend/src/user.svelte.js

@@ -1,8 +1,10 @@
 export const user = $state({
-    name : null
+    name : null,
+    theme : 'default'
 })
 
 export async function checkUser(){
+    console.log('checkUser()');
     const url = `${location.protocol}//${location.host.replace('5173','8080')}/api/user/whoami`;
     const response = await fetch(url,{
         credentials: 'include'
@@ -34,6 +36,7 @@ export async function tryLogin(credentials){
     if (response.ok){
         const json = await response.json();
         for (let key of Object.keys(json)) user[key] = json[key];
+
     } else {
         alert("Login failed!");
     }