fix: 清理 typecheck 报错并修正迁移列名

- 加入缺失的 @testing-library/dom 依赖（RTL v16 必需 peer），修复 screen 导入
- 修正测试文件错误的相对导入路径（header 改具名导入；prompts/courses 指向 ../page）
- 修正联盟/打赏迁移 SQL：Prisma 列名为 camelCase（仅 @@map 映射表名），原 snake_case 列名导致查询 500，已重建表
- npm run typecheck 现已通过（EXIT=0）

backend/prisma/migrations/20260711000000_add_affiliate_models/migration.sql

@@ -1,5 +1,6 @@
 -- 联盟返佣系统：规范化数据模型
 -- 替换原先手写的 affiliate_stats / affiliate_clicks 裸表，改用 ORM 管理
+-- 注意：Prisma 字段名即为列名（camelCase），仅通过 @@map 映射表名为 snake_case
 
 CREATE TABLE IF NOT EXISTS `affiliate_programs` (
   `id` INT NOT NULL AUTO_INCREMENT,
@@ -7,54 +8,54 @@ CREATE TABLE IF NOT EXISTS `affiliate_programs` (
   `slug` VARCHAR(191) NOT NULL,
   `provider` VARCHAR(191),
   `description` TEXT,
-  `commission_rate` VARCHAR(191),
-  `cookie_days` INT,
-  `homepage_url` VARCHAR(191),
+  `commissionRate` VARCHAR(191),
+  `cookieDays` INT,
+  `homepageUrl` VARCHAR(191),
   `logo` VARCHAR(191),
   `active` TINYINT(1) NOT NULL DEFAULT 1,
-  `sort_order` INT NOT NULL DEFAULT 0,
-  `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
-  `updated_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
+  `sortOrder` INT NOT NULL DEFAULT 0,
+  `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+  `updatedAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
   PRIMARY KEY (`id`),
   UNIQUE INDEX `affiliate_programs_slug_key` (`slug`)
 ) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
 
 CREATE TABLE IF NOT EXISTS `affiliate_links` (
   `id` INT NOT NULL AUTO_INCREMENT,
-  `program_id` INT NOT NULL,
+  `programId` INT NOT NULL,
   `title` VARCHAR(191) NOT NULL,
   `description` TEXT,
   `url` TEXT NOT NULL,
   `thumbnail` VARCHAR(191),
-  `tool_id` INT,
-  `skill_id` VARCHAR(191),
+  `toolId` INT,
+  `skillId` VARCHAR(191),
   `tags` TEXT,
-  `estimated_commission` DOUBLE NOT NULL DEFAULT 0,
-  `sort_order` INT NOT NULL DEFAULT 0,
-  `is_featured` TINYINT(1) NOT NULL DEFAULT 0,
+  `estimatedCommission` DOUBLE NOT NULL DEFAULT 0,
+  `sortOrder` INT NOT NULL DEFAULT 0,
+  `isFeatured` TINYINT(1) NOT NULL DEFAULT 0,
   `active` TINYINT(1) NOT NULL DEFAULT 1,
-  `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
-  `updated_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
+  `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+  `updatedAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
   PRIMARY KEY (`id`),
-  INDEX `affiliate_links_program_id_idx` (`program_id`),
-  INDEX `affiliate_links_tool_id_idx` (`tool_id`),
-  INDEX `affiliate_links_skill_id_idx` (`skill_id`),
-  CONSTRAINT `affiliate_links_program_id_fkey` FOREIGN KEY (`program_id`) REFERENCES `affiliate_programs` (`id`) ON DELETE CASCADE,
-  CONSTRAINT `affiliate_links_tool_id_fkey` FOREIGN KEY (`tool_id`) REFERENCES `tools` (`id`) ON DELETE SET NULL,
-  CONSTRAINT `affiliate_links_skill_id_fkey` FOREIGN KEY (`skill_id`) REFERENCES `skills` (`id`) ON DELETE SET NULL
+  INDEX `affiliate_links_programId_idx` (`programId`),
+  INDEX `affiliate_links_toolId_idx` (`toolId`),
+  INDEX `affiliate_links_skillId_idx` (`skillId`),
+  CONSTRAINT `affiliate_links_programId_fkey` FOREIGN KEY (`programId`) REFERENCES `affiliate_programs` (`id`) ON DELETE CASCADE,
+  CONSTRAINT `affiliate_links_toolId_fkey` FOREIGN KEY (`toolId`) REFERENCES `tools` (`id`) ON DELETE SET NULL,
+  CONSTRAINT `affiliate_links_skillId_fkey` FOREIGN KEY (`skillId`) REFERENCES `skills` (`id`) ON DELETE SET NULL
 ) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
 
 CREATE TABLE IF NOT EXISTS `affiliate_clicks` (
   `id` INT NOT NULL AUTO_INCREMENT,
-  `link_id` INT NOT NULL,
-  `user_id` INT,
+  `linkId` INT NOT NULL,
+  `userId` INT,
   `ip` VARCHAR(191),
-  `user_agent` TEXT,
+  `userAgent` TEXT,
   `ref` VARCHAR(191),
-  `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+  `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
   PRIMARY KEY (`id`),
-  INDEX `affiliate_clicks_link_id_idx` (`link_id`),
-  CONSTRAINT `affiliate_clicks_link_id_fkey` FOREIGN KEY (`link_id`) REFERENCES `affiliate_links` (`id`) ON DELETE CASCADE
+  INDEX `affiliate_clicks_linkId_idx` (`linkId`),
+  CONSTRAINT `affiliate_clicks_linkId_fkey` FOREIGN KEY (`linkId`) REFERENCES `affiliate_links` (`id`) ON DELETE CASCADE
 ) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
 
 -- 清理旧的手写裸表（被本迁移的规范化模型取代）