Improve auto-next prompt generation

Author: lee101

codex-rs/tui/src/app.rs

@@ -4223,6 +4223,10 @@ impl App {
                 self.chat_widget
                     .submit_user_message_with_mode(text, collaboration_mode);
             }
+            AppEvent::AutoNextPromptGenerated { thread_id, prompt } => {
+                self.chat_widget
+                    .handle_auto_next_prompt_generated(thread_id, prompt);
+            }
             AppEvent::ManageSkillsClosed => {
                 self.chat_widget.handle_manage_skills_closed();
             }

codex-rs/tui/src/app_event.rs

@@ -511,6 +511,12 @@ pub(crate) enum AppEvent {
         collaboration_mode: CollaborationModeMask,
     },
 
+    /// Deliver an asynchronously generated auto-next prompt back to the active thread.
+    AutoNextPromptGenerated {
+        thread_id: ThreadId,
+        prompt: String,
+    },
+
     /// Open the approval popup.
     FullScreenApprovalRequest(ApprovalRequest),