Refactoring + migrate mail package to server.

backend/common/src/main/java/dev/rheinsw/shared/mail/MailServiceClient.java

@@ -1,46 +0,0 @@
-package dev.rheinsw.shared.mail;
-
-import dev.rheinsw.shared.mail.dto.MailRequest;
-import lombok.RequiredArgsConstructor;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.beans.factory.annotation.Value;
-import org.springframework.http.HttpEntity;
-import org.springframework.http.HttpHeaders;
-import org.springframework.scheduling.annotation.Async;
-import org.springframework.stereotype.Service;
-import org.springframework.web.client.RestTemplate;
-
-/**
- * @author Thatsaphorn Atchariyaphap
- * @since 22.04.25
- */
-@Service
-@RequiredArgsConstructor
-public class MailServiceClient {
-
-    private static final Logger log = LoggerFactory.getLogger(MailServiceClient.class);
-
-    private final RestTemplate restTemplate;
-
-    private static final String MAIL_ENDPOINT = "http://gateway/api/mail";
-
-    @Async
-    public void sendMail(String email, String subject, String userMessage) {
-        MailRequest request = new MailRequest(email, subject, userMessage);
-        postEmail(request);
-    }
-
-    private void postEmail(MailRequest request) {
-        try {
-            HttpHeaders headers = new HttpHeaders();
-
-            HttpEntity<MailRequest> entity = new HttpEntity<>(request, headers);
-
-            restTemplate.postForEntity(MAIL_ENDPOINT + "/send", entity, String.class);
-        } catch (Exception e) {
-            log.error("Failed to send email to {}: {}", request.getTo(), e.getMessage());
-        }
-    }
-
-}

backend/common/src/main/java/dev/rheinsw/shared/mail/dto/MailRequest.java

@@ -1,20 +0,0 @@
-package dev.rheinsw.shared.mail.dto;
-
-import lombok.AllArgsConstructor;
-import lombok.Data;
-import lombok.Getter;
-import lombok.NoArgsConstructor;
-
-/**
- * @author Thatsaphorn Atchariyaphap
- * @since 22.04.25
- */
-@Data
-@Getter
-@NoArgsConstructor
-@AllArgsConstructor
-public class MailRequest {
-    private String to;
-    private String subject;
-    private String message;
-}