set paper_preview_demo to gallery

app.py

@@ -1,5 +1,5 @@
 import gradio as gr
-from apps import translator_demo, simple_chat_demo, instruction_chat_demo, content_moderation_demo
+from apps import translator_demo, simple_chat_demo, instruction_chat_demo, content_moderation_demo, paper_preview_demo
 from chatClient import ChatClient, ChatGLM2APIClient, ChatGLM2ModelClient
 from config import Settings
 
@@ -10,6 +10,7 @@ demo_register = {
     "预设指令对话": instruction_chat_demo,
     "翻译器": translator_demo,
     "内容审查": content_moderation_demo,
+    "论文速览": paper_preview_demo,
 }