feat: 重构用户角色系统为管理员标识

- 将用户角色字段从role改为is_admin布尔值
- 更新相关API权限检查逻辑
- 修改数据库schema和迁移文件
- 调整前端用户显示逻辑
- 添加API响应工具函数
- 优化权限检查中间件
- 重构英雄组件为原子组件

drizzle/0001_clammy_toro.sql

@@ -0,0 +1,17 @@
+PRAGMA foreign_keys=OFF;--> statement-breakpoint
+CREATE TABLE `__new_users` (
+	`id` text PRIMARY KEY NOT NULL,
+	`email` text NOT NULL,
+	`password_hash` text,
+	`name` text NOT NULL,
+	`is_admin` integer DEFAULT false NOT NULL,
+	`avatar` text,
+	`created_at` integer NOT NULL,
+	`updated_at` integer NOT NULL
+);
+--> statement-breakpoint
+INSERT INTO `__new_users`("id", "email", "password_hash", "name", "is_admin", "avatar", "created_at", "updated_at") SELECT "id", "email", "password_hash", "name", "is_admin", "avatar", "created_at", "updated_at" FROM `users`;--> statement-breakpoint
+DROP TABLE `users`;--> statement-breakpoint
+ALTER TABLE `__new_users` RENAME TO `users`;--> statement-breakpoint
+PRAGMA foreign_keys=ON;--> statement-breakpoint
+CREATE UNIQUE INDEX `users_email_unique` ON `users` (`email`);