Upgrade heatmaps stile Hotjar: movimenti mouse e anteprima pagina live.

Traccia i movimenti aggregati, overlay a gradienti sull’iframe della pagina e toggle click/move in admin.

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

backend/app/services/analytics/aggregate.rb

@@ -10,14 +10,14 @@ module Analytics
         break if ids.empty?
 
         events = AnalyticsEvent.where(id: ids).to_a
-        apply_clicks(events.select { |e| e.event_type == "click" })
-        apply_stats(events.reject { |e| e.event_type == "click" })
+        apply_points(events.select { |e| e.event_type == "click" }, :click_count)
+        apply_points(events.select { |e| e.event_type == "move" }, :move_count)
+        apply_stats(events.select { |e| %w[pageview scroll].include?(e.event_type) })
         AnalyticsEvent.where(id: ids).delete_all
       end
     end
 
     def purge_old!(retention: 30.days)
-      # Raw should already be empty after aggregate; keep as safety net.
       AnalyticsEvent.where("occurred_at < ?", retention.ago).delete_all
       AnalyticsPageCell.where("day < ?", retention.ago.to_date).delete_all
       AnalyticsPageStat.where("day < ?", retention.ago.to_date).delete_all
@@ -25,7 +25,7 @@ module Analytics
 
     private
 
-    def apply_clicks(events)
+    def apply_points(events, counter_attr)
       return if events.empty?
 
       grid = AnalyticsPageCell::GRID_SIZE
@@ -36,7 +36,7 @@ module Analytics
         cell_x = [[(e.x_pct.to_f / 100 * grid).floor, grid - 1].min, 0].max
         cell_y = [[(e.y_pct.to_f / 100 * grid).floor, grid - 1].min, 0].max
         key = [e.occurred_at.in_time_zone.to_date, e.page_path, e.device, cell_x, cell_y]
-        grouped[key] += 1
+        grouped[key] += e.weight.to_i.clamp(1, 500)
       end
 
       now = Time.current
@@ -44,7 +44,7 @@ module Analytics
         cell = AnalyticsPageCell.find_or_initialize_by(
           day: day, page_path: page_path, device: device, cell_x: cell_x, cell_y: cell_y
         )
-        cell.click_count = cell.click_count.to_i + count
+        cell[counter_attr] = cell[counter_attr].to_i + count
         cell.created_at ||= now
         cell.updated_at = now
         cell.save!
@@ -61,7 +61,7 @@ module Analytics
         bucket = grouped[key] ||= { pageviews: 0, scroll_samples: 0, scroll_sum: 0, max_scroll: 0 }
         case e.event_type
         when "pageview"
-          bucket[:pageviews] += 1
+          bucket[:pageviews] += e.weight.to_i.clamp(1, 500)
         when "scroll"
           pct = e.scroll_pct.to_f.round
           bucket[:scroll_samples] += 1