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/forgot-password-repository.ts

@@ -0,0 +1,19 @@
+import { prisma } from "@/lib/db";
+import { createLogger } from "@/lib/logger";
+import {
+    RepoInputFindUserByEmail,
+    RepoOutputFindUserByEmail
+} from "./forgot-password-repository-dto";
+
+const log = createLogger("forgot-password-repository");
+
+export async function repoFindUserByEmail(dto: RepoInputFindUserByEmail): Promise<RepoOutputFindUserByEmail> {
+    log.debug("Finding user by email", { email: dto.email });
+
+    const user = await prisma.user.findUnique({
+        where: { email: dto.email },
+        select: { id: true },
+    });
+
+    return user;
+}