Enhance loading feedback: add loading animation for Assistant replies, improve TUI message updates, and refine response handling logic. Update README to reflect roadmap progress.

crates/owlen-cli/src/main.rs

@@ -92,8 +92,14 @@ async fn run_app(
     session_rx: &mut mpsc::UnboundedReceiver<SessionEvent>,
 ) -> Result<()> {
     loop {
+        // Advance loading animation frame
+        app.advance_loading_animation();
+
         terminal.draw(|f| ui::render_chat(f, app))?;
 
+        // Process any pending LLM requests AFTER UI has been drawn
+        app.process_pending_llm_request().await?;
+
         tokio::select! {
             Some(event) = event_rx.recv() => {
                 if let AppState::Quit = app.handle_event(event).await? {
@@ -103,6 +109,10 @@ async fn run_app(
             Some(session_event) = session_rx.recv() => {
                 app.handle_session_event(session_event)?;
             }
+            // Add a timeout to keep the animation going even when there are no events
+            _ = tokio::time::sleep(tokio::time::Duration::from_millis(100)) => {
+                // This will cause the loop to continue and advance the animation
+            }
         }
     }
 }