Complete missing UX flows and production integrity commands

templates/components/newsletter_form.html

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+<form method="post" action="/newsletter/subscribe/" data-newsletter-form>
+  {% csrf_token %}
+  <input type="hidden" name="source" value="{{ source|default:'unknown' }}" />
+  <label>
+    <span>{{ label|default:"Newsletter" }}</span>
+    <input type="email" name="email" required />
+  </label>
+  <input type="text" name="honeypot" style="display:none" />
+  <button type="submit">Subscribe</button>
+  <p data-newsletter-message aria-live="polite"></p>
+</form>