feat: add automated email reminders for pending submitters

- Add ProcessSubmitterRemindersJob (hourly recurrent via Sidekiq)
- Add SendSubmitterReminderEmailJob for individual reminder dispatch
- Add scheduled_jobs initializer to bootstrap the reminder job
- Add reminder configuration UI in notification settings
- Skip reminders for completed, declined, or archived submissions

app/jobs/process_submitter_reminders_job.rb

@@ -0,0 +1,94 @@
+# frozen_string_literal: true
+
+class ProcessSubmitterRemindersJob
+  include Sidekiq::Job
+
+  sidekiq_options queue: :recurrent
+
+  def perform
+    AccountConfig.where(key: AccountConfig::SUBMITTER_REMINDERS).find_each do |config|
+      process_account_reminders(config)
+    end
+
+    ProcessSubmitterRemindersJob.perform_in(1.hour)
+  end
+
+  private
+
+  def process_account_reminders(config)
+    durations = parse_durations(config.value)
+    return if durations.empty?
+
+    pending_submitters = Submitter
+      .joins(:submission)
+      .where(account_id: config.account_id)
+      .where.not(sent_at: nil)
+      .where(completed_at: nil, declined_at: nil)
+      .where.not(email: [nil, ''])
+      .where(submissions: { archived_at: nil })
+
+    pending_submitters.find_each do |submitter|
+      next if submitter.template&.archived_at?
+
+      send_reminder_if_due(submitter, durations)
+    end
+  end
+
+  def send_reminder_if_due(submitter, durations)
+    reminder_count = submitter.submission_events.where(event_type: 'send_reminder_email').count
+
+    duration = case reminder_count
+               when 0 then durations[:first]
+               when 1 then durations[:second]
+               when 2 then durations[:third]
+               else return
+               end
+
+    return unless duration
+
+    base_time = if reminder_count == 0
+                  submitter.sent_at
+                else
+                  submitter.submission_events
+                    .where(event_type: 'send_reminder_email')
+                    .order(:created_at)
+                    .last&.created_at || submitter.sent_at
+                end
+
+    return if base_time.nil?
+    return unless Time.current >= base_time + duration
+
+    SendSubmitterReminderEmailJob.perform_async('submitter_id' => submitter.id)
+  end
+
+  def parse_durations(value)
+    return {} unless value.is_a?(Hash)
+
+    result = {}
+    result[:first] = duration_to_seconds(value['first_duration']) if value['first_duration'].present?
+    result[:second] = duration_to_seconds(value['second_duration']) if value['second_duration'].present?
+    result[:third] = duration_to_seconds(value['third_duration']) if value['third_duration'].present?
+    result
+  end
+
+  def duration_to_seconds(key)
+    case key
+    when 'one_hour' then 1.hour
+    when 'two_hours' then 2.hours
+    when 'four_hours' then 4.hours
+    when 'eight_hours' then 8.hours
+    when 'twelve_hours' then 12.hours
+    when 'twenty_four_hours' then 24.hours
+    when 'two_days' then 2.days
+    when 'three_days' then 3.days
+    when 'four_days' then 4.days
+    when 'five_days' then 5.days
+    when 'six_days' then 6.days
+    when 'seven_days' then 7.days
+    when 'eight_days' then 8.days
+    when 'fifteen_days' then 15.days
+    when 'twenty_one_days' then 21.days
+    when 'thirty_days' then 30.days
+    end
+  end
+end

app/jobs/send_submitter_reminder_email_job.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+class SendSubmitterReminderEmailJob
+  include Sidekiq::Job
+
+  sidekiq_options queue: :mailers
+
+  def perform(params = {})
+    submitter = Submitter.find(params['submitter_id'])
+
+    return if submitter.completed_at?
+    return if submitter.declined_at?
+    return if submitter.submission.archived_at?
+    return if submitter.template&.archived_at?
+    return unless submitter.email.to_s.include?('@')
+    return unless Accounts.can_send_emails?(submitter.account)
+
+    mail = SubmitterMailer.invitation_email(submitter)
+
+    mail.deliver_now!
+
+    SubmissionEvent.create!(submitter:, event_type: 'send_reminder_email')
+  end
+end

app/views/notifications_settings/_reminder_banner.html.erb

@@ -1 +0,0 @@
-<%= render 'reminder_placeholder' %>

app/views/notifications_settings/_reminder_placeholder.html.erb

@@ -1,15 +0,0 @@
-<div class="alert my-4">
-  <%= svg_icon('info_circle', class: 'w-6 h-6') %>
-  <div>
-    <p class="font-bold">
-      <%= t('unlock_with_docuseal_pro') %>
-    </p>
-    <p>
-      <%= t('send_automatic_email_reminders_to_your_recipients') %>
-      <br>
-      <a class="link font-medium" target="_blank" href="<%= Docuseal.multitenant? ? console_redirect_index_path(redir: "#{Docuseal::CONSOLE_URL}/plans") : "#{Docuseal::CLOUD_URL}/sign_up?#{{ redir: "#{Docuseal::CONSOLE_URL}/on_premises" }.to_query}" %>" data-turbo="false">
-        <%= t('learn_more') %>
-      </a>
-    </p>
-  </div>
-</div>

config/initializers/scheduled_jobs.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+ActiveSupport.on_load(:sidekiq_config) do
+  ProcessSubmitterRemindersJob.perform_in(1.minute)
+end