fix: remove unused imports and suppress dead code warning

- Remove unused leptos::logging, leptos::html, leptos::task::spawn_local from toast.rs
- Remove unused Torrent import from table.rs
- Add #[allow(dead_code)] to modal.rs for unused fields

frontend/src/components/modal.rs

@@ -1,5 +1,6 @@
 use leptos::prelude::*;
 
+#[allow(dead_code)]
 #[component]
 pub fn Modal(
     #[prop(into)] title: String,

frontend/src/components/toast.rs

@@ -1,7 +1,4 @@
 use leptos::prelude::*;
-use leptos::logging;
-use leptos::html;
-use leptos::task::spawn_local;
 use shared::NotificationLevel;
 
 // ============================================================================

frontend/src/components/torrent/table.rs

@@ -4,7 +4,7 @@ use leptos::task::spawn_local;
 use leptos_use::use_timeout_fn;
 use crate::store::{get_action_messages, show_toast_with_signal};
 use crate::api;
-use shared::{NotificationLevel, Torrent};
+use shared::NotificationLevel;
 
 fn format_bytes(bytes: i64) -> String {
     const UNITS: [&str; 6] = ["B", "KB", "MB", "GB", "TB", "PB"];