feat: update default earthquake event selection to the third event in the dropdown

app.py

@@ -1132,7 +1132,7 @@ with gr.Blocks(title="TTSAM 震度預測系統", fill_height=True) as demo:
         with gr.Column(scale=1):
             event_dropdown = gr.Dropdown(
                 choices=list(earthquake_metadata.keys()),
-                value=list(earthquake_metadata.keys())[0],
+                value=list(earthquake_metadata.keys())[2],
                 label="選擇地震事件",
             )
             duration_slider = gr.Slider(
@@ -1160,7 +1160,7 @@ with gr.Blocks(title="TTSAM 震度預測系統", fill_height=True) as demo:
             label="實際觀測震度",
             type="filepath",
             value=load_observed_intensity_image(
-                list(earthquake_metadata.keys())[0]),
+                list(earthquake_metadata.keys())[2]),
         )
 
     # ========== 隱藏的 State 變數（用於快取中間結果）==========