Feat: more predictable projet load behavior

src/input.rs

@@ -258,6 +258,7 @@ fn handle_modal_input(ctx: &mut InputContext, key: KeyEvent) -> InputResult {
                     match mode {
                         FileBrowserMode::Save => ctx.dispatch(AppCommand::Save(path)),
                         FileBrowserMode::Load => {
+                            let _ = ctx.seq_cmd_tx.send(SeqCommand::StopAll);
                             ctx.dispatch(AppCommand::Load(path));
                             load_project_samples(ctx);
                         }