Initial commit: mail-server with WebFlux backend and Angular v22 Synthwave frontend

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

backend/src/main/java/com/mailserver/dto/SendRequest.java

@@ -0,0 +1,31 @@
+package com.mailserver.dto;
+
+import jakarta.validation.constraints.Email;
+import jakarta.validation.constraints.NotBlank;
+
+public class SendRequest {
+
+    @NotBlank
+    @Email
+    private String to;
+
+    @NotBlank
+    private String subject;
+
+    @NotBlank
+    private String body;
+
+    private boolean html = false;
+
+    public String getTo() { return to; }
+    public void setTo(String to) { this.to = to; }
+
+    public String getSubject() { return subject; }
+    public void setSubject(String subject) { this.subject = subject; }
+
+    public String getBody() { return body; }
+    public void setBody(String body) { this.body = body; }
+
+    public boolean isHtml() { return html; }
+    public void setHtml(boolean html) { this.html = html; }
+}