Add contacts, reply/forward, pagination, HTML toggle, Docker Compose for VPS

Co-authored-by: Junie <junie@jetbrains.com>

backend/src/main/java/com/mailserver/service/MailService.java

@@ -1,6 +1,7 @@
 package com.mailserver.service;
 
 import com.mailserver.domain.Attachment;
+import com.mailserver.domain.Contact;
 import com.mailserver.domain.Folder;
 import com.mailserver.domain.Message;
 import com.mailserver.domain.User;
@@ -8,6 +9,7 @@ import com.mailserver.dto.AttachmentResponse;
 import com.mailserver.dto.MessageResponse;
 import com.mailserver.dto.SendRequest;
 import com.mailserver.repository.AttachmentRepository;
+import com.mailserver.repository.ContactRepository;
 import com.mailserver.repository.FolderRepository;
 import com.mailserver.repository.MessageRepository;
 import com.mailserver.repository.UserRepository;
@@ -46,6 +48,7 @@ public class MailService {
     private final FolderRepository folderRepository;
     private final UserRepository userRepository;
     private final AttachmentRepository attachmentRepository;
+    private final ContactRepository contactRepository;
     private final SpamFilterService spamFilterService;
     private final DkimService dkimService;
 
@@ -60,12 +63,14 @@ public class MailService {
 
     public MailService(MessageRepository messageRepository, FolderRepository folderRepository,
                        UserRepository userRepository, AttachmentRepository attachmentRepository,
+                       ContactRepository contactRepository,
                        SpamFilterService spamFilterService,
                        DkimService dkimService) {
         this.messageRepository = messageRepository;
         this.folderRepository = folderRepository;
         this.userRepository = userRepository;
         this.attachmentRepository = attachmentRepository;
+        this.contactRepository = contactRepository;
         this.spamFilterService = spamFilterService;
         this.dkimService = dkimService;
     }
@@ -381,4 +386,49 @@ public class MailService {
 
         return send.then(readResponse);
     }
+
+    // --- Contacts ---
+
+    public Flux<Contact> getContacts(Long userId) {
+        return contactRepository.findByUserId(userId);
+    }
+
+    public Mono<Contact> addContact(Long userId, String name, String email, String phone, String company) {
+        if (email == null || email.trim().isEmpty()) {
+            return Mono.error(new IllegalArgumentException("Email is required"));
+        }
+        Contact contact = new Contact();
+        contact.setUserId(userId);
+        contact.setName(name != null ? name : "");
+        contact.setEmail(email.trim());
+        contact.setPhone(phone != null ? phone : "");
+        contact.setCompany(company != null ? company : "");
+        return contactRepository.save(contact);
+    }
+
+    public Mono<Contact> updateContact(Long id, Long userId, String name, String email, String phone, String company) {
+        return contactRepository.findById(id)
+            .switchIfEmpty(Mono.error(new IllegalArgumentException("Contact not found")))
+            .flatMap(contact -> {
+                if (!contact.getUserId().equals(userId)) {
+                    return Mono.error(new IllegalArgumentException("Not your contact"));
+                }
+                if (name != null) contact.setName(name);
+                if (email != null) contact.setEmail(email.trim());
+                if (phone != null) contact.setPhone(phone);
+                if (company != null) contact.setCompany(company);
+                return contactRepository.save(contact);
+            });
+    }
+
+    public Mono<Void> deleteContact(Long id, Long userId) {
+        return contactRepository.findById(id)
+            .switchIfEmpty(Mono.error(new IllegalArgumentException("Contact not found")))
+            .flatMap(contact -> {
+                if (!contact.getUserId().equals(userId)) {
+                    return Mono.error(new IllegalArgumentException("Not your contact"));
+                }
+                return contactRepository.delete(contact);
+            });
+    }
 }