Fix auto-play next track during pause/unpause transitions

When rapidly pressing play/pause, MPV briefly reports idle-active
as true during state transitions. Combined with our player_state
being set to Playing after unpause, this incorrectly triggered the
auto-play next track logic.

Fix: Add is_paused() check to auto-play condition to ensure we only
advance to next track when the current track actually ends, not
during pause state transitions.

src/main.rs

@@ -304,7 +304,8 @@ async fn run_app<B: ratatui::backend::Backend>(
 
             // Check if track ended and play next (but only if track was actually loaded AND played)
             // Require position > 0.5 to ensure track actually started playing (not just loaded)
-            if player.is_idle() && state.player_state == PlayerState::Playing && state.current_duration > 0.0 && state.current_position > 0.5 {
+            // Also check !is_paused to avoid triggering during pause/unpause transitions
+            if player.is_idle() && !player.is_paused() && state.player_state == PlayerState::Playing && state.current_duration > 0.0 && state.current_position > 0.5 {
                 state.play_next();
                 // play_next() handles the play mode and may stop if in Normal mode at end
                 if state.player_state == PlayerState::Playing {