fix: 添加获取用户信息的GET API路由

backend/app.py

@@ -501,8 +501,9 @@ def get_users():
 
 
 @app.route('/api/admin/users/<int:id>', methods=['GET'])
+@app.route('/api/user/<int:id>', methods=['GET'])
 def get_user(id):
-    """获取单个用户"""
+    """获取单个用户信息"""
     conn = get_db()
     cursor = conn.cursor()
     cursor.execute('SELECT * FROM users WHERE id = ?', (id,))