Add phase 2: recipes with visibility, photos, search and favourites

- Recipe model with ingredients (amount/range, unit, group, note), steps,
  lowercase tags, author notes, source URL and private/public visibility
- Central RecipeQuerySet.visible_to() used by every read path; edit only
  by owner, delete by owner or admin (visible recipes only)
- Text-based editing: ingredient/step parser with roundtrip and scaling
- Photo upload (JPEG/PNG/WebP/HEIC), re-encoded to WebP without EXIF,
  thumbnails, cover image, served only through permission-checked view
- Search across title, description, ingredients, tags; ingredient and tag
  filters; "mine" and favourites views
- Admin can delete all recipes of a deactivated user
- Acceptance tests: private recipes unreachable for others and admins
  in list, search, tags, favourites, detail, edit, delete and image URLs

Co-Authored-By: Claude Opus 5.5 <[email protected]>

recipes/urls.py

@@ -0,0 +1,18 @@
+from django.urls import path
+
+from . import views
+
+app_name = "recipes"
+
+urlpatterns = [
+    path("", views.recipe_list, name="list"),
+    path("rezepte/neu/", views.recipe_create, name="create"),
+    path("rezepte/<int:pk>/", views.recipe_detail, name="detail"),
+    path("rezepte/<int:pk>/bearbeiten/", views.recipe_edit, name="edit"),
+    path("rezepte/<int:pk>/loeschen/", views.recipe_delete, name="delete"),
+    path("rezepte/<int:pk>/favorit/", views.favorite_toggle, name="favorite"),
+    path("rezepte/<int:pk>/fotos/", views.photo_upload, name="photo_upload"),
+    path("rezepte/<int:pk>/fotos/<int:image_id>/titelbild/", views.photo_cover, name="photo_cover"),
+    path("rezepte/<int:pk>/fotos/<int:image_id>/loeschen/", views.photo_delete, name="photo_delete"),
+    path("bilder/<uuid:image_uuid>/<str:size>.webp", views.photo_serve, name="photo"),
+]