管理后台 server 使用蓝图模式，降低维护成本，降低修改功能时对其他模块的影响

admin/dashboard/blueprints/auth.py

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+from flask import Blueprint, render_template, request, redirect, url_for, session, current_app
+from functools import wraps
+
+# 创建认证蓝图
+auth_bp = Blueprint('auth', __name__)
+
+# 登录检查装饰器
+def login_required(f):
+    @wraps(f)
+    def decorated_function(*args, **kwargs):
+        if not session.get('logged_in'):
+            return redirect(url_for('auth.login'))
+        return f(*args, **kwargs)
+    return decorated_function
+
+# 登录页面
+@auth_bp.route('/login', methods=['GET', 'POST'])
+def login():
+    error = None
+    if request.method == 'POST':
+        username = request.form['username']
+        password = request.form['password']
+        
+        # 从应用上下文获取服务器实例
+        server = current_app.dashboard_server
+        
+        if username == server.username and password == server.password:
+            session['logged_in'] = True
+            return redirect(url_for('main.index'))
+        else:
+            error = '用户名或密码错误'
+    
+    return render_template('login.html', error=error)
+
+# 登出
+@auth_bp.route('/logout')
+def logout():
+    session.pop('logged_in', None)
+    return redirect(url_for('auth.login'))