Update app.py

app.py

@@ -17,6 +17,7 @@ def run_command(command, cwd=None):
 
 def setup_llama_cpp():
     """克隆并编译llama.cpp仓库"""
+    run_command('pip install llama-cpp-python')
     if not os.path.exists('llama.cpp'):
         run_command('git clone https://github.com/ggml-org/llama.cpp.git')
         os.chdir('llama.cpp')