fix: nav/footer wireframe, honeypot CSP, explore topics, comment E2E coverage

- Replace nav inline newsletter form with Subscribe CTA link per wireframe
- Remove newsletter form from footer; add Connect section with social/RSS links
- Fix honeypot inputs using hidden attribute (inline style blocked by CSP)
- Add available_tags to HomePage.get_context for Explore Topics section
- Add data-comment-form attribute to main comment form for reliable locating
- Seed approved comment in E2E content for reply flow testing
- Expand test_comments.py: moderation message, not-immediately-visible,
  missing fields, reply form visible, reply submission
- Make COMMENT_RATE_LIMIT_PER_MINUTE configurable; set 100 in dev to prevent
  E2E test exhaustion; update rate limit unit test with override_settings
- Update newsletter/home E2E tests to reflect nav form removal
- Update unit test to assert no nav/footer newsletter forms

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

apps/comments/tests/test_more.py

@@ -1,5 +1,6 @@
 import pytest
 from django.core.cache import cache
+from django.test import override_settings
 
 from apps.comments.forms import CommentForm
 
@@ -11,6 +12,7 @@ def test_comment_form_rejects_blank_body():
 
 
 @pytest.mark.django_db
+@override_settings(COMMENT_RATE_LIMIT_PER_MINUTE=3)
 def test_comment_rate_limit(client, article_page):
     cache.clear()
     payload = {

apps/comments/views.py

@@ -33,7 +33,8 @@ class CommentCreateView(View):
         ip = client_ip_from_request(request)
         key = f"comment-rate:{ip}"
         count = cache.get(key, 0)
-        if count >= 3:
+        rate_limit = getattr(settings, "COMMENT_RATE_LIMIT_PER_MINUTE", 3)
+        if count >= rate_limit:
             return HttpResponse(status=429)
         cache.set(key, count + 1, timeout=60)