Aggiunge filtri avanzati per i destinatari delle campagne email.

La scelta della lista passa da un wizard a tre passi, con anteprima del conteggio e lista congelata solo dopo la conferma.

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

app/javascript/controllers/audience_preview_controller.js

@@ -0,0 +1,34 @@
+import { Controller } from "@hotwired/stimulus"
+
+export default class extends Controller {
+  static targets = ["intent"]
+
+  refresh() {
+    this.persistOpenSections()
+    this.setIntent("preview")
+    this.element.requestSubmit()
+  }
+
+  apply() {
+    this.persistOpenSections()
+    this.setIntent("apply")
+  }
+
+  persistOpenSections() {
+    this.element.querySelectorAll("input[data-open-section]").forEach((input) => input.remove())
+    this.element.querySelectorAll("details[data-section]").forEach((details) => {
+      if (!details.open) return
+
+      const input = document.createElement("input")
+      input.type = "hidden"
+      input.name = "open_sections[]"
+      input.value = details.dataset.section
+      input.setAttribute("data-open-section", "")
+      this.element.appendChild(input)
+    })
+  }
+
+  setIntent(value) {
+    if (this.hasIntentTarget) this.intentTarget.value = value
+  }
+}