Apply clippy fixes

codex-rs/tui/src/app.rs

@@ -2058,7 +2058,6 @@ impl App {
         self.reset_transcript_state();
         if let Some(thread_id) = self
             .active_thread_id
-            .clone()
             .or_else(|| self.chat_widget.thread_id())
         {
             let session_configured = self.session_configured_for_thread(thread_id);

codex-rs/tui/src/chatwidget.rs

@@ -800,7 +800,6 @@ impl ChatWidget {
         let model_for_header = event.model.clone();
         let reasoning_effort = event
             .reasoning_effort
-            .clone()
             .or_else(|| self.current_collaboration_mode.reasoning_effort());
         self.session_header.set_model(&model_for_header);
         self.current_collaboration_mode = self.current_collaboration_mode.with_updates(