Expose tick interval constant and simplify handler

Move the 33 ms tick interval into `tick` as a public constant `TICK_MS`
and drop the parameter from `handle_tick_event`.
Update re‑exports and callers accordingly

src/app/threads/tick.rs

@@ -4,8 +4,10 @@ use std::{
     time::{Duration, Instant},
 };
 
-pub fn handle_tick_event(tx: Sender<()>, tick_ms: u8) {
-    let interval: Duration = Duration::from_millis(tick_ms as u64);
+pub const TICK_MS: u8 = 33;
+
+pub fn handle_tick_event(tx: Sender<()>) {
+    let interval: Duration = Duration::from_millis(TICK_MS as u64);
     loop {
         if tx.send(()).is_err() {
             break;