Upgraded Leptos to 0.8. Fixes #1

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/components/admin_portal.rs

@@ -1,4 +1,4 @@
-use leptos::*;
+use leptos::prelude::*;
 use crate::backend::data::User;
 use crate::components::modal_box::{DialogOpener, ModalBody, ModalDialog};
 use crate::components::user_menu::{MenuOpener, UserMenu};
@@ -12,7 +12,7 @@ fn about(opener: DialogOpener) -> impl IntoView {
         <ModalDialog opener=opener title="">
             <ModalBody>
                 <img src="/rezervovator_l.svg" width="180"/> <br /><br/>
-                <p>
+                <div>
                     {trl("Online booking application for sports facilities and service providers.")}<br/>
                     {format!(" v {}", env!("CARGO_PKG_VERSION"))}<br/><br/>
                     <div align="center">
@@ -20,7 +20,7 @@ fn about(opener: DialogOpener) -> impl IntoView {
                         <a href="https://leptos.dev" target="_blank"><img src="/Leptos_logo.png" height="40"/></a> <br/><br/>
                         "(c) 2023 - 2025"
                     </div>
-                </p>
+                </div>
             </ModalBody>
         </ModalDialog>
     }
@@ -66,7 +66,7 @@ fn settings_menu(opener: MenuOpener) -> impl IntoView {
 pub fn AdminPortal(children: Children) -> impl IntoView {
     let user_menu = MenuOpener::new();
     let settings_menu = MenuOpener::new();
-    let (user, set_user) = create_signal(User::default());
+    let (user, set_user) = signal(User::default());
     let editor = DialogOpener::new();
     let pw_changer = DialogOpener::new();
     let drawer = use_context::<MenuOpener>().expect("No drawer opener");