feat: implement mailer contact form

Author: Bulletdev

app/controllers/api/v1/contact_controller.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+module Api
+  module V1
+    # Handles public contact form submissions from prostaff.gg/contact
+    class ContactController < ApplicationController
+      def create
+        name    = params.require(:name)
+        email   = params.require(:email)
+        subject = params.require(:subject)
+        message = params.require(:message)
+
+        ContactMailer.new_message(
+          name: name,
+          email: email,
+          subject: subject,
+          message: message
+        ).deliver_later
+
+        render json: { message: 'Message sent successfully' }, status: :ok
+      rescue ActionController::ParameterMissing => e
+        render json: { error: { message: "Missing required parameter: #{e.param}" } }, status: :bad_request
+      end
+    end
+  end
+end

app/mailers/contact_mailer.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+# Mailer for contact form submissions from prostaff.gg/contact
+class ContactMailer < ApplicationMailer
+  def new_message(name:, email:, subject:, message:)
+    @name = name
+    @email = email
+    @subject = subject
+    @message = message
+
+    mail(
+      to: ENV.fetch('ADMIN_EMAIL', 'hello@prostaff.gg'),
+      reply_to: email,
+      subject: "[ProStaff Contact] #{subject}"
+    )
+  end
+end

app/views/contact_mailer/new_message.html.erb

@@ -0,0 +1,15 @@
+<h2>New Contact Form Submission</h2>
+
+<p><strong>From:</strong> <%= @name %> &lt;<%= @email %>&gt;</p>
+<p><strong>Subject:</strong> <%= @subject %></p>
+
+<hr>
+
+<p><%= simple_format(@message) %></p>
+
+<hr>
+
+<p style="color: #888; font-size: 12px;">
+  This message was sent via the contact form at prostaff.gg/contact.<br>
+  Reply directly to this email to respond to <%= @name %>.
+</p>

app/views/contact_mailer/new_message.text.erb

@@ -0,0 +1,13 @@
+New Contact Form Submission
+===========================
+
+From: <%= @name %> <<%= @email %>>
+Subject: <%= @subject %>
+
+---
+
+<%= @message %>
+
+---
+This message was sent via the contact form at prostaff.gg/contact.
+Reply directly to this email to respond to <%= @name %>.

config/routes.rb

@@ -353,6 +353,9 @@
             as: 'meta_champion'
       end
 
+      # Contact form (public, no auth)
+      post 'contact', to: 'contact#create'
+
       # Team Messaging -- DM history + soft-delete
       resources :messages, only: %i[index destroy],
                            controller: '/messaging/controllers/messages'