refactor: 修复 modules 三层架构违规

- auth: actionDeleteAccount 改用 service+repo，forgot-password 完整三层实现
- card: serviceCheckCardOwnership 替代直接调用 repository
- deck: 移除 service 层的 use server 指令
- dictionary: 数据转换逻辑从 repository 移到 service
- ocr: 认证移到 action 层，跨模块调用改用 service
- translator: genIPA/genLanguage 改用 service 层

src/modules/auth/auth-service.ts

@@ -1,15 +1,18 @@
 import { auth } from "@/auth";
 import {
     repoFindUserByUsername,
-    repoFindUserById
+    repoFindUserById,
+    repoDeleteUserCascade
 } from "./auth-repository";
 import {
     ServiceInputGetUserProfileByUsername,
     ServiceInputGetUserProfileById,
     ServiceInputSignIn,
     ServiceInputSignUp,
+    ServiceInputDeleteAccount,
     ServiceOutputAuth,
-    ServiceOutputUserProfile
+    ServiceOutputUserProfile,
+    ServiceOutputDeleteAccount
 } from "./auth-service-dto";
 
 /**
@@ -92,3 +95,7 @@ export async function serviceGetUserProfileByUsername(dto: ServiceInputGetUserPr
 export async function serviceGetUserProfileById(dto: ServiceInputGetUserProfileById): Promise<ServiceOutputUserProfile> {
     return await repoFindUserById(dto);
 }
+
+export async function serviceDeleteAccount(dto: ServiceInputDeleteAccount): Promise<ServiceOutputDeleteAccount> {
+    return await repoDeleteUserCascade({ userId: dto.userId });
+}