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/spec/requests/admin/analytics_spec.rb

@@ -22,7 +22,8 @@ RSpec.describe "Admin analytics", type: :request do
       device: "desktop",
       cell_x: 10,
       cell_y: 15,
-      click_count: 4
+      click_count: 4,
+      move_count: 40
     )
   end
 
@@ -31,12 +32,14 @@ RSpec.describe "Admin analytics", type: :request do
     expect(response).to have_http_status(:ok)
     expect(response.body).to include("/prezzi")
     expect(response.body).to include("12")
+    expect(response.body).to include("40")
   end
 
   it "mostra la heatmap di una pagina" do
     get admin_analytics_page_path, params: { page_path: "/prezzi" }
     expect(response).to have_http_status(:ok)
     expect(response.body).to include("admin-heatmap")
+    expect(response.body).to include("admin-heatmap-frame")
     expect(response.body).to include("/prezzi")
   end
 end