Usa screenshot di pagina come sfondo heatmap al posto dell’iframe.

Cattura periodica client-side (con consenso), storage ActiveStorage e overlay allineato all’immagine.

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

backend/db/migrate/20260820220000_create_analytics_page_snapshots.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+class CreateAnalyticsPageSnapshots < ActiveRecord::Migration[7.2]
+  def change
+    create_table :analytics_page_snapshots, id: :uuid, default: -> { "gen_random_uuid()" } do |t|
+      t.string :page_path, null: false
+      t.string :device, null: false
+      t.integer :width, null: false, default: 0
+      t.integer :height, null: false, default: 0
+      t.datetime :captured_at, null: false
+      t.timestamps
+    end
+
+    add_index :analytics_page_snapshots, %i[page_path device], unique: true, name: "index_analytics_page_snapshots_unique"
+  end
+end