bugfix

app.py

@@ -38,10 +38,13 @@ def suggest_next(text, model_name, k, m):
         early_stopping=True
     )
     suggestions = [out["generated_text"][len(text):] for out in outs]
-    # 更新 Radio choices，不預設選中任何項
-    return update(choices=suggestions, value=None)
+    # 保證 choices 與 value 為空字串而非 None
+    return update(choices=suggestions, value="")
 
 def append_suggestion(current, choice):
+    # 防止 None 導致的拼接錯誤
+    if not choice:
+        return current
     return current + choice
 
 with gr.Blocks() as demo:
@@ -50,19 +53,19 @@ with gr.Blocks() as demo:
         "結合小型語言模型與 ZeroGPU，即時 IME 風格建議條。"
     )
 
-    # 欄位一：建議清單，置頂模仿輸入法建議欄
+    # 建議清單置頂
     suggestions = gr.Radio(
         [], label="建議清單", interactive=True, type="value", elem_id="suggestions-bar"
     )
 
-    # 欄位二：輸入區及生成按鈕，同層排版
+    # 輸入區與生成按鈕並排
     with gr.Row():
         input_text = gr.TextArea(
             label="輸入文字", lines=4, placeholder="請在此輸入起始片段…"
         )
         gpu_button = gr.Button("使用 GPU 生成建議")
 
-    # 欄位三：模型與參數設定
+    # 參數設定區
     with gr.Row():
         model_selector = gr.Dropdown(
             MODEL_LIST, value=MODEL_LIST[0], label="選擇模型"