So much better

src/state/playback.rs

@@ -1,14 +1,24 @@
 use crate::engine::PatternChange;
+use crate::model::{LaunchQuantization, SyncMode};
+
+#[derive(Clone)]
+pub struct StagedChange {
+    pub change: PatternChange,
+    pub quantization: LaunchQuantization,
+    pub sync_mode: SyncMode,
+}
 
 pub struct PlaybackState {
     pub playing: bool,
-    pub queued_changes: Vec<PatternChange>,
+    pub staged_changes: Vec<StagedChange>,
+    pub queued_changes: Vec<StagedChange>,
 }
 
 impl Default for PlaybackState {
     fn default() -> Self {
         Self {
             playing: true,
+            staged_changes: Vec::new(),
             queued_changes: Vec::new(),
         }
     }