refactor(db): 优化了代码，调整了import顺序，删除了无用变量

db/prompt_store.py

@@ -1,5 +1,4 @@
 import os
-import json
 import sys
 from typing import Optional
 from pathlib import Path

frontend/setting_page.py

@@ -1,9 +1,7 @@
 import gradio as gr
 from typing import List
 from sqlmodel import Session, select
-from db import get_sqlite_engine
 from schema import APIProvider
-import os
 from global_var import sql_engine
 
 def setting_page():

global_var.py

@@ -1,5 +1,4 @@
-from db import get_sqlite_engine
-from db import get_prompt_tinydb
+from db import get_sqlite_engine,get_prompt_tinydb
 
 prompt_store = get_prompt_tinydb("workdir")
 sql_engine = get_sqlite_engine("workdir")