P1e: persist undo and redo history across reloads

crates/zhila-daemon/src/main.rs

@@ -224,6 +224,8 @@ async fn save_now(shared: &Shared) {
         pattern: session.pattern(),
         cores: &state.cores,
         journal: session.journal(),
+        history: session.history(),
+        redo: session.redo(),
     };
     let result = {
         let mut store = shared.store.lock().expect("project store lock poisoned");