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]>

templates/recipes/detail.html

@@ -0,0 +1,85 @@
+{% extends "base.html" %}
+{% block title %}{{ recipe.title }}{% endblock %}
+{% block content %}
+<article class="recipe">
+  {% if images %}
+  <div class="gallery">
+    {% for img in images %}
+    <a href="{% url 'recipes:photo' img.uuid 'gross' %}"><img src="{% url 'recipes:photo' img.uuid 'gross' %}" alt="Foto {{ forloop.counter }}" width="{{ img.width }}" height="{{ img.height }}"{% if not forloop.first %} loading="lazy"{% endif %}></a>
+    {% endfor %}
+  </div>
+  {% endif %}
+
+  <h1>{{ recipe.title }}</h1>
+  <p class="muted">
+    von {{ recipe.owner.display_name }} · {% if recipe.is_public %}öffentlich{% else %}🔒 privat{% endif %}
+    · geändert {{ recipe.updated_at|date:"d.m.Y" }}
+  </p>
+
+  <div class="recipe-actions">
+    <form method="post" action="{% url 'recipes:favorite' recipe.pk %}">
+      {% csrf_token %}
+      <input type="hidden" name="next" value="{{ request.get_full_path }}">
+      <button type="submit" class="button secondary">{% if is_favorite %}★ Favorit{% else %}☆ Merken{% endif %}</button>
+    </form>
+    {% block extra_actions %}{% endblock %}
+    {% if is_owner %}<a class="button secondary" href="{% url 'recipes:edit' recipe.pk %}">Bearbeiten</a>{% endif %}
+    {% if can_delete %}<a class="button danger" href="{% url 'recipes:delete' recipe.pk %}">Löschen</a>{% endif %}
+  </div>
+
+  {% if recipe.description %}<p class="lead">{{ recipe.description|linebreaksbr }}</p>{% endif %}
+
+  {% if recipe.prep_minutes or recipe.cook_minutes %}
+  <ul class="facts">
+    {% if recipe.prep_minutes %}<li><span class="muted">Zubereitung</span> {{ recipe.prep_minutes }} Min.</li>{% endif %}
+    {% if recipe.cook_minutes %}<li><span class="muted">Koch-/Backzeit</span> {{ recipe.cook_minutes }} Min.</li>{% endif %}
+    {% if recipe.prep_minutes and recipe.cook_minutes %}<li><span class="muted">Gesamt</span> {{ recipe.total_minutes }} Min.</li>{% endif %}
+  </ul>
+  {% endif %}
+
+  {% if tags %}
+  <p class="chips">{% for tag in tags %}<a class="chip" href="{% url 'recipes:list' %}?tag={{ tag.name|urlencode }}">#{{ tag.name }}</a>{% endfor %}</p>
+  {% endif %}
+
+  <section class="card">
+    <div class="section-head">
+      <h2>Zutaten</h2>
+      {% include "recipes/_servings.html" %}
+    </div>
+    {% for group, items in ingredient_groups %}
+      {% if group %}<h3>{{ group }}</h3>{% endif %}
+      <ul class="ingredients">
+        {% for ing in items %}
+        <li><span class="amount">{{ ing.amount }} {{ ing.unit }}</span> <span>{{ ing.name }}{% if ing.note %}<span class="muted">, {{ ing.note }}</span>{% endif %}</span></li>
+        {% endfor %}
+      </ul>
+    {% empty %}
+      <p class="muted">Keine Zutaten angegeben.</p>
+    {% endfor %}
+  </section>
+
+  <section class="card">
+    <h2>Zubereitung</h2>
+    {% if steps %}
+    <ol class="steps">
+      {% for step in steps %}<li>{{ step.text|linebreaksbr }}</li>{% endfor %}
+    </ol>
+    {% else %}
+    <p class="muted">Keine Schritte angegeben.</p>
+    {% endif %}
+  </section>
+
+  {% if recipe.author_notes %}
+  <section class="card notes">
+    <h2>Notizen von {{ recipe.owner.display_name }}</h2>
+    <p>{{ recipe.author_notes|linebreaksbr }}</p>
+  </section>
+  {% endif %}
+
+  {% if recipe.source_url %}
+  <p class="muted">Quelle: <a href="{{ recipe.source_url }}" rel="noopener noreferrer nofollow" target="_blank">{{ recipe.source_url|truncatechars:60 }}</a></p>
+  {% endif %}
+
+  {% block after_recipe %}{% endblock %}
+</article>
+{% endblock %}