Update app.py

app.py

@@ -6,9 +6,16 @@ from zipfile import ZipFile
 
 try:
     import kaleido
+    import plotly.io as pio
 except ImportError:
     st.error("請安裝 'kaleido' 套件以啟用圖像導出功能：\n\n    $ pip install kaleido")
 
+# set kaleido config if installed, to try and fix the chinese font issue
+try:
+    pio.kaleido.scope.default_font = "Microsoft JhengHei, Noto Sans CJK, Arial"
+except:
+    st.error("字型設定錯誤，請確定是否安裝 kaleido")
+
 
 def load_data(uploaded_file):
     """載入並處理CSV檔案"""
@@ -96,7 +103,7 @@ def save_all_radar_charts(df, selected_columns, comparison_rows):
         )
 
         file_path = os.path.join(output_dir, f"{student}_comparison.png")
-        fig.write_image(file_path, engine="kaleido") # Removed the unsupported font_family here.
+        fig.write_image(file_path, engine="kaleido")
 
     # 壓縮所有圖表
     zip_path = "radar_charts.zip"