Fix time display to update smoothly

Change position update logic to only trigger redraw when the
displayed value (rounded to seconds) changes, not when the raw
float value changes. This eliminates jumpy time display and
reduces unnecessary redraws.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-player"
-version = "0.1.17"
+version = "0.1.18"
 edition = "2021"
 
 [dependencies]

src/main.rs

@@ -183,8 +183,10 @@ async fn run_app<B: ratatui::backend::Backend>(
             let new_position = player.get_position().unwrap_or(0.0);
             let new_duration = player.get_duration().unwrap_or(0.0);
 
-            // Only mark as changed if position moved by at least 0.5 seconds
-            if (new_position - last_position).abs() >= 0.5 {
+            // Only update if displayed value (rounded to seconds) changed
+            let old_display_secs = last_position as u32;
+            let new_display_secs = new_position as u32;
+            if new_display_secs != old_display_secs {
                 state.current_position = new_position;
                 last_position = new_position;
                 state_changed = true;