修复权限验证问题：普通用户无法访问后台管理页面

demo/src/main/resources/data.sql

@@ -1,10 +1,9 @@
 -- 用户数据
 INSERT IGNORE INTO users (username, email, password_hash, role, points, phone, nickname, gender, birthday, address) VALUES 
 ('admin', 'admin@example.com', 'admin123', 'ROLE_ADMIN', 200, '15538239326', '管理员', 'M', '1990-01-01', '北京市朝阳区'),
-('demo', 'demo@example.com', 'demo', 'ROLE_USER', 100, '13800138000', '演示用户', 'M', '1995-05-15', '上海市浦东新区'),
+('13689270819', '13689270819@example.com', '0627', 'ROLE_USER', 100, '13689270819', '演示用户', 'M', '1995-05-15', '上海市浦东新区'),
 ('testuser', 'testuser@example.com', 'test123', 'ROLE_USER', 75, '13900139000', '测试用户', 'F', '1992-08-20', '广州市天河区'),
 ('mingzi_FBx7foZYDS7inLQb', 'mingzi@example.com', '123456', 'ROLE_USER', 25, '13700137000', '名字用户', 'M', '1988-12-10', '深圳市南山区'),
-('15538239326', '15538239326@example.com', '0627', 'ROLE_ADMIN', 50, '15538239326', '手机用户', 'F', '1993-03-25', '杭州市西湖区'),
 ('user001', 'user001@example.com', 'password123', 'ROLE_USER', 150, '13600136000', '用户001', 'M', '1991-07-12', '成都市锦江区'),
 ('user002', 'user002@example.com', 'password123', 'ROLE_USER', 80, '13500135000', '用户002', 'F', '1994-11-08', '武汉市江汉区'),
 ('user003', 'user003@example.com', 'password123', 'ROLE_USER', 200, '13400134000', '用户003', 'M', '1989-04-18', '西安市雁塔区'),