Ship Print Forge shop site (colors, photos, 3D viewer) (#2)

## Summary

- Rebrand the Django client template as Print Forge (`client_site` → `print_forge`) with shop + shipping enabled.
- Product listings support multiple photos, color variants (shared price/description/STL, per-color stock and photos), and a photo-first / 3D-second gallery.
- Public pages use 3D printer / printed-toy photography instead of leftover t-shirt mockups; beta CI deploys on `master`.

Closes #1
Infra: [server-infra#27](ai_ml_operations/server-infra#27) (easy deploy beta).

## Test plan

- [ ] Product page shows photo first, 3D model second; color swatches swap photos and stock
- [ ] Portal can upload multiple photos and per-color qty/images; STL stays shared
- [ ] Public home/about/gallery have no t-shirt mockups
- [ ] `manage.py test` passes
- [ ] After server-infra#27: beta deploy to `print-forge-preview.aimloperations.com`

Reviewed-on: #2

site/contacts/templates/contacts/list.html

@@ -10,7 +10,9 @@
   <div style="display:flex;gap:8px;flex-wrap:wrap">
     <a class="btn btn-ghost btn-sm" href="{% url 'contacts:import' %}">Import CSV / Excel</a>
     <a class="btn btn-ghost btn-sm" href="{% url 'contacts:create' %}">New contact</a>
-    <a class="btn btn-primary btn-sm" href="{% url 'messaging:campaign_list' %}">New campaign</a>
+    {% if 'email_sms' in enabled_features %}
+    <a class="btn btn-primary btn-sm" href="{% url 'email_sms:campaign_list' %}">New campaign</a>
+    {% endif %}
   </div>
 </div>
 

site/contacts/tests_merge.py

@@ -219,3 +219,19 @@ class PortalCreateMatchPromptTests(TestCase):
         self.existing.refresh_from_db()
         self.assertEqual(self.existing.first_name, "Alexander")
         self.assertIn("alt@example.com", self.existing.notes)
+
+
+class ContactListTests(TestCase):
+    def setUp(self):
+        User = get_user_model()
+        self.user = User.objects.create_user(
+            username="lister", password="test-pass-123"
+        )
+        self.client = Client()
+        self.client.login(username="lister", password="test-pass-123")
+
+    def test_list_renders_and_links_campaigns(self):
+        response = self.client.get(reverse("contacts:list"))
+        self.assertEqual(response.status_code, 200)
+        self.assertContains(response, "Mailing list")
+        self.assertContains(response, reverse("email_sms:campaign_list"))