Allinea i KPI su due righe e aggiunge lo storico orario degli invii confermati.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/services/mailings/hourly_throughput.rb

@@ -1,6 +1,7 @@
 class Mailings::HourlyThroughput
   HOUR = 1.hour
   RECENT = 15.minutes
+  HISTORY_HOURS = 12
 
   def initialize(project, now: Time.current)
     @project = project
@@ -23,6 +24,31 @@ class Mailings::HourlyThroughput
     sent + failed
   end
 
+  def hourly_history
+    @hourly_history ||= begin
+      from = (@now - (HISTORY_HOURS - 1).hours).beginning_of_hour
+      keyed = recipients.sent
+        .where(sent_at: from..@now)
+        .pluck(:sent_at)
+        .each_with_object(Hash.new(0)) do |sent_at, counts|
+          counts[sent_at.in_time_zone.beginning_of_hour] += 1
+        end
+
+      HISTORY_HOURS.times.map do |index|
+        at = from + index.hours
+        { at: at, count: keyed[at] || 0 }
+      end
+    end
+  end
+
+  def history_total
+    hourly_history.sum { |bucket| bucket[:count] }
+  end
+
+  def history_max
+    [hourly_history.map { |bucket| bucket[:count] }.max, 1].max
+  end
+
   private
 
   def sent_since(window)

app/views/mailings/dashboard.html.erb

@@ -26,7 +26,7 @@
     </div>
   <% end %>
 
-  <div class="grid grid-cols-2 gap-3 md:grid-cols-3 xl:grid-cols-5">
+  <div class="grid grid-cols-2 gap-3 md:grid-cols-3">
     <div class="<%= card_class %> p-4">
       <div class="text-xs uppercase tracking-wide text-zinc-500">In corso</div>
       <div class="mt-1 text-2xl font-semibold tabular-nums"><%= @active_mailings.size %></div>
@@ -41,6 +41,18 @@
         <% end %>
       </div>
     </div>
+    <div class="<%= card_class %> p-4">
+      <div class="text-xs uppercase tracking-wide text-zinc-500">Storico invio</div>
+      <div class="mt-2 flex items-end gap-0.5" style="height: 2.5rem" role="img" aria-label="Invii confermati nelle ultime 12 ore">
+        <% @hourly_throughput.hourly_history.each do |bucket| %>
+          <% pct = (bucket[:count].to_f / @hourly_throughput.history_max * 100).round %>
+          <div class="flex-1 rounded <%= bucket[:count].positive? ? "bg-emerald-500" : "bg-zinc-200 dark:bg-zinc-700" %>"
+               style="height: <%= bucket[:count].positive? ? [pct, 12].max : 8 %>%"
+               title="<%= bucket[:at].strftime("%H:%M") %>: <%= bucket[:count] %>"></div>
+        <% end %>
+      </div>
+      <div class="mt-1 text-xs text-zinc-500"><%= @hourly_throughput.history_total %> inviate · ultime 12 ore</div>
+    </div>
     <div class="<%= card_class %> p-4">
       <div class="text-xs uppercase tracking-wide text-zinc-500">In pausa (fascia)</div>
       <div class="mt-1 text-2xl font-semibold tabular-nums"><%= @paused_mailings.size %></div>

test/controllers/mailings_controller_test.rb

@@ -34,6 +34,8 @@ class MailingsControllerTest < ActionDispatch::IntegrationTest
     assert_response :success
     assert_select "div", text: "Mail / ora"
     assert_match(/1 ultimi 15 min/, response.body)
+    assert_select "div", text: "Storico invio"
+    assert_match(/1 inviate · ultime 12 ore/, response.body)
   end
 
   test "creates a draft and opens audience filters" do

test/services/mailings/hourly_throughput_test.rb

@@ -46,6 +46,26 @@ class Mailings::HourlyThroughputTest < ActiveSupport::TestCase
     assert_equal 1, stats.recent_sent
   end
 
+  test "builds twelve hourly buckets of confirmed sends" do
+    now = Time.zone.parse("2026-09-07 12:40")
+    travel_to now do
+      add_recipient status: "sent", sent_at: now - 20.minutes
+      add_recipient status: "sent", sent_at: now - 70.minutes, mailing: extra_mailing("Ore 11")
+      add_recipient status: "sent", sent_at: now - 80.minutes, mailing: extra_mailing("Ore 11 bis")
+      add_recipient status: "sent", sent_at: now - 13.hours, mailing: extra_mailing("Fuori finestra")
+
+      stats = Mailings::HourlyThroughput.new(@project, now: now)
+      history = stats.hourly_history
+
+      assert_equal 12, history.size
+      assert_equal now.beginning_of_hour, history.last[:at]
+      assert_equal 1, history.last[:count]
+      assert_equal 2, history[-2][:count]
+      assert_equal 0, history.first[:count]
+      assert_equal 3, stats.history_total
+    end
+  end
+
   private
 
   def extra_mailing(name = "Altra campagna")