fix: automatic cargo recommended fixes

src/api.rs

@@ -1,4 +1,4 @@
-use crate::models::{Label, Task, TaskDetail};
+use crate::models::{Task, TaskDetail};
 use reqwest::Client;
 use std::collections::HashMap;
 

src/main.rs

@@ -66,7 +66,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     terminal.hide_cursor()?;
 
-    let mut app = App::new(tasks);
+    let app = App::new(tasks);
 
     let res = run_app(&mut terminal, app, &instance_url, &api_key).await;
 

src/ui.rs

@@ -1,7 +1,6 @@
 use crate::app::{App, InputMode};
-use crate::models::{Label, Task};
 use ansi_parser::{AnsiParser, Output};
-use crossterm::event::{self, Event as CEvent, KeyCode};
+use crossterm::event::{self, Event as CEvent};
 use ratatui::{
     backend::Backend,
     layout::{Alignment, Constraint, Direction, Layout, Rect},