Remove AppChannels, use separate receivers

Refactor App::run to accept individual Receiver arguments instead of an
AppChannels struct. Delete the AppChannels definition and its re‑export,
and update main.rs to create each channel manually and pass the
receivers
to App::run. Rename the CLI field `sound_track` to `soundtrack` and
adjust
all references. Clean up imports and formatting accordingly.

src/app/app.rs

@@ -1,13 +1,14 @@
 use crate::{
-    app::{
-        GameStates, handle_keybindings,
-        threads::{AppChannels, AudioCmd},
-        view::View,
-    },
+    app::{GameStates, handle_keybindings, threads::AudioCmd, view::View},
     cli::Cli,
 };
 use ratatui::{DefaultTerminal, Frame, crossterm::event::KeyEvent, layout::Rect};
-use std::{io::Result, sync::mpsc::Sender, thread::sleep, time::Duration};
+use std::{
+    io::Result,
+    sync::mpsc::{Receiver, Sender},
+    thread::sleep,
+    time::Duration,
+};
 
 pub struct App {
     pub exit: bool,
@@ -38,15 +39,21 @@ impl App {
         self.states.as_mut()
     }
 
-    pub fn run(&mut self, terminal: &mut DefaultTerminal, channels: AppChannels) -> Result<()> {
+    pub fn run(
+        &mut self,
+        terminal: &mut DefaultTerminal,
+        input_rx: Receiver<KeyEvent>,
+        resize_rx: Receiver<(u16, u16)>,
+        tick_rx: Receiver<()>,
+    ) -> Result<()> {
         while !self.exit {
             terminal.draw(|frame: &mut Frame<'_>| self.draw(frame))?;
 
-            if let Ok(key) = channels.input_rx.try_recv() {
+            if let Ok(key) = input_rx.try_recv() {
                 self.handle_key_event(key)?;
             }
 
-            if let Ok((_, _)) = channels.resize_rx.try_recv() {
+            if let Ok((_, _)) = resize_rx.try_recv() {
                 let window_area: Rect = self.window_area;
                 if let Some(state) = self.states_mut() {
                     state
@@ -56,7 +63,7 @@ impl App {
                 }
             }
 
-            if let Ok(()) = channels.tick_rx.try_recv() {
+            if let Ok(()) = tick_rx.try_recv() {
                 self.update()?;
             }