add random group id placeholder

app.py

@@ -392,6 +392,11 @@ def create_app():
         with gr.Tab("Preference Evaluation", id="tab_eval"):
             gr.Markdown("### Rank the methods by preference for each story")
 
+            gr.Markdown(
+                "> **Note:** 不需要考虑音频质量、音画同步，重点关注**视觉一致性**、"
+                "**空间连贯性**、**叙事连贯性**、**剧本忠实度**、**视觉吸引力**。"
+            )
+
             with gr.Row():
                 story_progress = gr.Markdown("**Progress:** Load a group first")
                 story_nav_prev = gr.Button("Previous Story", size="sm")
@@ -653,6 +658,11 @@ def create_app():
                 outputs=[eval_status, current_story_idx, rank_comment],
             )
 
+        def _assign_random_group():
+            return str(random.randint(1, NUM_GROUPS))
+
+        app.load(_assign_random_group, outputs=[group_input])
+
     return app