Update app.py

app.py

@@ -238,7 +238,7 @@ def run_mineru_parsing_and_dag_gen(session_id, api_key, api_base_url, progress=g
         progress(0.8, desc="构建图结构中...")
         for line in iter(process_dag.stdout.readline, ''):
             full_log += line
-            yield create_progress_html(80, "⏳ Building Graph...", "active"), get_debug_info(session_id), full_log, no_change, no_change, no_change, no_change
+            yield create_progress_html(80, "⏳ Building DAG...", "active"), get_debug_info(session_id), full_log, no_change, no_change, no_change, no_change
         process_dag.stdout.close()
         returncode_dag = process_dag.wait()
         
@@ -581,6 +581,18 @@ with gr.Blocks(theme=purple_theme, css=custom_css) as demo:
                 # 4. Results & Downloads
                 with gr.Group(elem_classes="gradio-group"):
                     gr.Markdown("### 📦 Generation Results & Download")
+                    
+                    # --- 新增：无输出时的美化空状态提示词 ---
+                    download_placeholder = gr.HTML(
+                        '''
+                        <div style="display: flex; flex-direction: column; align-items: center; justify-content: center; height: 160px; border: 2px dashed rgba(192, 132, 252, 0.6); border-radius: 16px; background-color: rgba(250, 245, 255, 0.5); color: #9333EA; text-align: center; transition: all 0.3s ease;">
+                            <span style="font-size: 32px; margin-bottom: 8px;">📦</span>
+                            <span style="font-weight: 600; font-size: 16px; margin-bottom: 4px;">Awaiting Generation</span>
+                            <span style="font-size: 13px; color: #A855F7; opacity: 0.8;">Generated assets will appear here as a downloadable ZIP archive.</span>
+                        </div>
+                        '''
+                    )
+                    
                     download_file = gr.File(label="📥 Get Final Zip Archive", interactive=False, visible=False)
 
                 # 5. Debugging
@@ -644,5 +656,15 @@ with gr.Blocks(theme=purple_theme, css=custom_css) as demo:
     
     refresh_btn.click(fn=get_debug_info, inputs=[session_id_state], outputs=debug_view)
 
+    def toggle_empty_placeholder(file_val):
+        # 如果获取到了文件（值不为空），就隐藏占位提示词；否则保持显示
+        return gr.update(visible=(file_val is None))
+
+    download_file.change(
+        fn=toggle_empty_placeholder,
+        inputs=[download_file],
+        outputs=[download_placeholder]
+    )
+
 if __name__ == "__main__":
     demo.queue(default_concurrency_limit=5).launch()