Fix time calculation in run_troubleshooting function: Use local current_time instead of current_time_utc for determining time_24_hours_ago.

app.py

@@ -101,7 +101,7 @@ def run_troubleshooting():
         current_time = datetime.datetime.now(datetime.timezone.utc)
 
         # 24時間前のUTC
-        time_24_hours_ago = current_time_utc - datetime.timedelta(hours=24)
+        time_24_hours_ago = current_time - datetime.timedelta(hours=24)
 
         # Filter sensor data for the last 24 hours
         # Use the globally available sensor_df and filter it each time the function is called