Update sankey_plot.py

sankey_plot.py

@@ -40,12 +40,12 @@ def plot_sankey_from_df(sankey_df: pd.DataFrame, title="问题 → 关键词共
             source=df['source'].map(node_index),
             target=df['target'].map(node_index),
             value=df['value'],
-            color=link_colors
+            color=link_colors            
         )
     )])
 
     fig.update_layout(title_text=title, font=dict(family="Microsoft YaHei", size=18), width=900, height=600,
-                      margin=dict(l=20, r=20, t=60, b=20))
+                      margin=dict(l=20, r=20, t=60, b=20),autosize=False )   # 关闭自动缩放
     # === 5. 导出高清 PNG（关键！）===
     # img_bytes = fig.to_image( format="png", width=900, height=600, scale=2)  # 2倍 DPI → 超清！
     # return base64.b64encode(img_bytes).decode()