Aggiunge annunci in-app/sito, contatti e migliora UI copertina sul portale.

Include admin/API/banner nativi, form contatti e reset copertina standard con layout edit più ampio.

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

backend/spec/requests/admin/announcements_spec.rb

@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+RSpec.describe "Admin announcements", type: :request do
+  let!(:admin) { AdminAccount.create!(username: "ops-news", password: "Password123") }
+
+  before do
+    post admin_login_path, params: { username: "ops-news", password: "Password123" }
+  end
+
+  it "crea e pubblica un avviso visibile alle app e al sito" do
+    post admin_announcements_path, params: {
+      app_announcement: {
+        kind: "update",
+        severity: "info",
+        status: "published",
+        title: "Nuova versione",
+        body: "Aggiorna l'app dallo store.",
+        dismissible: "1",
+        show_on_app: "1",
+        show_on_web_public: "1",
+        show_on_web_private: "0"
+      }
+    }
+
+    expect(response).to redirect_to(admin_announcements_path)
+    notice = AppAnnouncement.last
+    expect(notice.title).to eq("Nuova versione")
+    expect(notice).to be_published
+    expect(notice.show_on_app).to be(true)
+    expect(notice.show_on_web_public).to be(true)
+    expect(notice.show_on_web_private).to be(false)
+
+    get admin_announcements_path
+    expect(response.body).to include("Nuova versione")
+    expect(response.body).to include(I18n.t("admin.announcements.channels.web_public"))
+  end
+
+  it "elimina un avviso" do
+    item = AppAnnouncement.create!(
+      kind: "info", status: "published", title: "Da togliere", body: "Test"
+    )
+
+    delete admin_announcement_path(item)
+
+    expect(response).to redirect_to(admin_announcements_path)
+    expect(AppAnnouncement.find_by(id: item.id)).to be_nil
+  end
+end