feat: show plant card button on detail page when card photos exist

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plants/templates/plants/plant_detail.html

@@ -77,6 +77,10 @@
     {% include "plants/partials/photo_gallery.html" %}
 </div>
 
+{% if plant.card_photos.exists %}
+<a href="{% url 'plant_card' plant.pk %}" class="btn btn-sm btn-outline-secondary mb-2">🪧 View plant card</a>
+{% endif %}
+
 <a href="{% url 'plant_delete' plant.pk %}" class="btn btn-outline-danger btn-sm mt-2">Delete plant</a>
 
 {% endblock %}

plants/tests/test_views.py

@@ -88,6 +88,17 @@ class TestPlantDetail:
         assert resp.context['plant'] == plant
         assert resp.context['pruning_status'] == 'no_schedule'
 
+    def test_card_button_shown_when_card_photos_exist(self, client):
+        plant = Plant.objects.create(name='Fern')
+        PlantCardPhoto.objects.create(plant=plant, image='plants/cards/card.jpg')
+        resp = client.get(reverse('plant_detail', args=[plant.pk]))
+        assert 'View plant card' in resp.content.decode()
+
+    def test_card_button_hidden_when_no_card_photos(self, client):
+        plant = Plant.objects.create(name='Fern')
+        resp = client.get(reverse('plant_detail', args=[plant.pk]))
+        assert 'View plant card' not in resp.content.decode()
+
 
 @pytest.mark.django_db
 class TestLogPruning:

plants/views/plants.py

@@ -29,7 +29,7 @@ def plant_list(request):
 
 def plant_detail(request, pk):
     plant = get_object_or_404(
-        Plant.objects.select_related('species', 'location').prefetch_related('pruning_logs', 'photos'),
+        Plant.objects.select_related('species', 'location').prefetch_related('pruning_logs', 'photos', 'card_photos'),
         pk=pk,
     )
     today = date.today()