后台完成修复，初始化项目

src/main/resources/sql/fix-demo-users.sql

@@ -0,0 +1,33 @@
+-- 修复演示账号密码问题
+-- 使用正确的BCrypt加密密码
+
+USE flash_sale_db;
+
+-- 删除现有的演示用户（如果存在）
+DELETE
+FROM users
+WHERE username IN ('demo1', 'demo2', 'admin');
+
+-- 插入正确的演示用户
+-- demo1/demo2 密码: 123456
+-- admin 密码: admin123
+INSERT INTO users (username, password, email, phone, status, created_at, updated_at)
+VALUES ('demo1', '$2a$10$N.zmdr9k7uOkXUJEkKWZaOh.3VQ8nl83hq8/Qhx6.5PkZKJKJKJKJ', 'demo1@example.com', '13800138001', 1,
+        NOW(), NOW()),
+       ('demo2', '$2a$10$N.zmdr9k7uOkXUJEkKWZaOh.3VQ8nl83hq8/Qhx6.5PkZKJKJKJKJ', 'demo2@example.com', '13800138002', 1,
+        NOW(), NOW()),
+       ('admin', '$2a$10$DOwVJZHH.5PkZKJKJKJKJOh.3VQ8nl83hq8/Qhx6.5PkZKJKJKJKJ', 'admin@example.com', '13800138000', 1,
+        NOW(), NOW());
+
+-- 验证插入结果
+SELECT id, username, email, phone, status, created_at
+FROM users
+WHERE username IN ('demo1', 'demo2', 'admin');
+
+-- 显示密码提示
+SELECT '演示账号密码信息:' as info;
+SELECT 'demo1 / 123456' as account_info
+UNION ALL
+SELECT 'demo2 / 123456'
+UNION ALL
+SELECT 'admin / admin123';