diff --git a/app.py b/app.py
index f9a219a..ea2d963 100644
--- a/app.py
+++ b/app.py
@@ -1,8 +1,6 @@
 from flask import Flask, render_template, request, jsonify, abort, redirect, url_for, session, flash
 from functools import wraps
 import os
-import subprocess
-import base64
 import sqlite3
 from werkzeug.security import generate_password_hash, check_password_hash
 
@@ -18,7 +16,6 @@ SQUID_PASSWD_FILE = 'config/squid_passwd'
 def init_db():
     with sqlite3.connect(DATABASE) as conn:
         cursor = conn.cursor()
-        # 创建admin_users表
         cursor.execute('''
             CREATE TABLE IF NOT EXISTS admin_users (
                 id INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -26,8 +23,6 @@ def init_db():
                 password TEXT NOT NULL
             )
         ''')
-
-        # 创建squid_users表
         cursor.execute('''
             CREATE TABLE IF NOT EXISTS squid_users (
                 id INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -36,8 +31,6 @@ def init_db():
                 is_active INTEGER DEFAULT 1
             )
         ''')
-
-        # 创建settings表
         cursor.execute('''
             CREATE TABLE IF NOT EXISTS settings (
                 id INTEGER PRIMARY KEY DEFAULT 1,
@@ -47,23 +40,21 @@ def init_db():
             )
         ''')
 
-        # 检查并初始化管理员用户
+        # 检查是否有管理员用户
         cursor.execute("SELECT COUNT(*) FROM admin_users")
         if cursor.fetchone()[0] == 0:
             cursor.execute(
                 "INSERT INTO admin_users (username, password) VALUES (?, ?)",
                 ('admin', generate_password_hash('admin123'))
-            )
 
-        # 检查并初始化设置
-        cursor.execute("SELECT COUNT(*) FROM settings")
-        if cursor.fetchone()[0] == 0:
-            cursor.execute(
-                "INSERT INTO settings (proxy_address, proxy_port) VALUES (?, ?)",
-                ('proxy.example.com', '3128')
-            )
+            # 检查是否有设置
+            cursor.execute("SELECT COUNT(*) FROM settings")
+            if cursor.fetchone()[0] == 0:
+                cursor.execute(
+                    "INSERT INTO settings (proxy_address, proxy_port) VALUES (?, ?)",
+                    ('proxy.example.com', '3128'))
 
-        conn.commit()
+            conn.commit()
 
             # 数据库连接
 
@@ -74,6 +65,18 @@ def get_db():
     return db
 
 
+# 更新squid_passwd文件
+def update_squid_passwd():
+    db = get_db()
+    users = db.execute("SELECT * FROM squid_users").fetchall()
+    db.close()
+
+    with open(SQUID_PASSWD_FILE, 'w') as f:
+        for user in users:
+            line = f"{'#' if not user['is_active'] else ''}{user['username']}:{user['password']}\n"
+            f.write(line)
+
+
 # 登录装饰器
 def login_required(f):
     @wraps(f)
@@ -167,6 +170,7 @@ def settings():
                 )
                 db.commit()
                 flash('密码修改成功', 'success')
+                return redirect(url_for('settings'))
 
         elif action == 'update_proxy':
             proxy_address = request.form['proxy_address']
@@ -178,6 +182,7 @@ def settings():
             )
             db.commit()
             flash('代理设置更新成功', 'success')
+            return redirect(url_for('settings'))
 
     settings = db.execute("SELECT * FROM settings WHERE id = 1").fetchone()
     db.close()
@@ -185,7 +190,7 @@ def settings():
     return render_template('settings.html', settings=settings)
 
 
-# Squid用户管理API
+# API路由
 @app.route('/api/toggle_user/<int:user_id>', methods=['POST'])
 @login_required
 def toggle_user(user_id):
@@ -199,8 +204,6 @@ def toggle_user(user_id):
             (new_status, user_id)
         )
         db.commit()
-
-        # 更新squid_passwd文件
         update_squid_passwd()
 
     db.close()
@@ -213,10 +216,7 @@ def delete_user(user_id):
     db = get_db()
     db.execute("DELETE FROM squid_users WHERE id = ?", (user_id,))
     db.commit()
-
-    # 更新squid_passwd文件
     update_squid_passwd()
-
     db.close()
     return jsonify({'success': True})
 
@@ -237,10 +237,7 @@ def create_user():
             (username, password)
         )
         db.commit()
-
-        # 更新squid_passwd文件
         update_squid_passwd()
-
         return jsonify({'success': True})
     except sqlite3.IntegrityError:
         return jsonify({'success': False, 'error': '用户名已存在'}), 400
@@ -263,25 +260,11 @@ def update_user_password():
         (password, user_id)
     )
     db.commit()
-
-    # 更新squid_passwd文件
     update_squid_passwd()
-
     db.close()
     return jsonify({'success': True})
 
 
-def update_squid_passwd():
-    db = get_db()
-    users = db.execute("SELECT * FROM squid_users").fetchall()
-    db.close()
-
-    with open(SQUID_PASSWD_FILE, 'w') as f:
-        for user in users:
-            line = f"{'#' if not user['is_active'] else ''}{user['username']}:{user['password']}\n"
-            f.write(line)
-
-
 if __name__ == '__main__':
     if not os.path.exists('config'):
         os.makedirs('config')
diff --git a/static/styles.css b/static/styles.css
index fcbb51a..967f650 100644
--- a/static/styles.css
+++ b/static/styles.css
@@ -1,4 +1,52 @@
-/* 基础样式 */
+/* 新增导航栏样式 */
+.navbar {
+    background-color: #2c3e50;
+    overflow: hidden;
+    display: flex;
+    padding: 0 20px;
+}
+
+.nav-item {
+    color: white;
+    text-align: center;
+    padding: 14px 16px;
+    text-decoration: none;
+    font-size: 16px;
+    transition: background-color 0.3s;
+}
+
+.nav-item:hover {
+    background-color: #1a252f;
+}
+
+.nav-item.active {
+    background-color: #3498db;
+}
+
+.nav-item.right {
+    margin-left: auto;
+}
+
+/* 修改密码提示样式 */
+.alert {
+    padding: 10px 15px;
+    margin: 10px 0;
+    border-radius: 4px;
+}
+
+.alert-error {
+    background-color: #f8d7da;
+    color: #721c24;
+    border: 1px solid #f5c6cb;
+}
+
+.alert-success {
+    background-color: #d4edda;
+    color: #155724;
+    border: 1px solid #c3e6cb;
+}
+
+/* 其他样式保持不变 */
 body {
     font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
     margin: 0;
@@ -9,7 +57,7 @@ body {
 
 .container {
     max-width: 1200px;
-    margin: 0 auto;
+    margin: 20px auto;
     padding: 20px;
     background-color: white;
     box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
diff --git a/templates/clients.html b/templates/clients.html
index 3763e52..a158021 100644
--- a/templates/clients.html
+++ b/templates/clients.html
@@ -6,15 +6,17 @@
     <link rel="stylesheet" href="{{ url_for('static', filename='styles.css') }}">
 </head>
 <body>
+    <div class="navbar">
+        <a href="{{ url_for('index') }}" class="nav-item">首页</a>
+        <a href="{{ url_for('clients') }}" class="nav-item active">用户管理</a>
+        <a href="{{ url_for('settings') }}" class="nav-item">系统设置</a>
+        <a href="{{ url_for('logout') }}" class="nav-item right">退出登录</a>
+    </div>
+
     <div class="container">
         <h1>用户管理</h1>
 
-        <div class="header-actions">
-            <a href="{{ url_for('index') }}" class="btn-primary">返回首页</a>
-            <a href="{{ url_for('settings') }}" class="btn-primary">系统设置</a>
-            <button id="createUserBtn" class="btn-success">+ 添加新用户</button>
-            <a href="{{ url_for('logout') }}" class="btn-danger">退出登录</a>
-        </div>
+        <button id="createUserBtn" class="btn-success">+ 添加新用户</button>
 
         <table>
             <tr>
@@ -49,10 +51,6 @@
             </tr>
             {% endfor %}
         </table>
-
-        <footer>
-            Squid代理管理系统 &copy; 2023
-        </footer>
     </div>
 
     <!-- 编辑用户模态框 -->