Update app.py

app.py

@@ -3,7 +3,8 @@ import random
 from vocab import get_sources, get_words_from_source
 from sentences import generate_sentences
 from ai_sentence import MODEL_LIST
-from quiz import generate_fill_in_blank_exam, check_exam, render_exam_interface
+from quiz import generate_fill_in_blank_exam, check_exam
+
 
 def process_sentence(mode, word, source, num, use_ai, model_name):
     try:
@@ -28,6 +29,7 @@ def process_sentence(mode, word, source, num, use_ai, model_name):
     except Exception as e:
         return f"<p style='color:red;'>❌ 發生錯誤：{str(e)}</p>", f"錯誤：{str(e)}"
 
+
 def project_description():
     return """
     # 📖 VocabLine 單字例句工具
@@ -49,6 +51,7 @@ def project_description():
     - GitHub：[https://github.com/dayuian](https://github.com/dayuian)
     """
 
+
 with gr.Blocks(css="""
     #card-group { padding: 15px; border-radius: 12px; background-color: rgba(255, 255, 255, 0.05); box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); margin-bottom: 15px; }
     .gradio-container { max-width: 800px; margin: auto; }