fix bug from log display

app.py

@@ -66,6 +66,11 @@ try:
 
     log_history = baseline_df.sort_values(by='timestamp', ascending=False).head(20).to_dict('records')
     
+    # 🌟 修正：先將時間欄位強制轉換為純字串，再轉成字典，避免前端 JS 解析崩潰
+    display_df = baseline_df.sort_values(by='timestamp', ascending=False).head(20).copy()
+    display_df['timestamp'] = display_df['timestamp'].dt.strftime('%Y-%m-%d %H:%M:%S')
+    log_history = display_df.to_dict('records')
+    
     initial_abnormal_logs = [log for log in log_history if "異常" in str(log.get("status", ""))]
     if initial_abnormal_logs:
         initial_df_abn = pd.DataFrame(initial_abnormal_logs)
@@ -469,7 +474,13 @@ with gr.Blocks(title="模擬校園入口與資安防護系統") as demo:
             custom_time_input = gr.Textbox(label="輸入自訂時間", placeholder="格式: YYYY-MM-DD HH:MM:SS", value="2026-03-17 03:00:00", visible=False)
             gr.Markdown("---")
             gr.Markdown("### 📊 即時 Log 與 AI 判定區")
-            log_display = gr.Dataframe(value=log_history, headers=["timestamp", "ip_address", "cookie_id", "account", "role", "action", "status"], datatype=["str", "str", "str", "str", "str", "str", "str"], interactive=False, wrap=True)
+            log_display = gr.Dataframe(
+                value=pd.DataFrame(log_history) if log_history else None, 
+                headers=["timestamp", "ip_address", "cookie_id", "account", "role", "action", "status"], 
+                datatype=["str", "str", "str", "str", "str", "str", "str"], 
+                interactive=False, 
+                wrap=True
+            )
 
         with gr.Column(scale=2):