Feat: Add catalog page with category tree and product grid

- Create catalog view with recursive category tree building
- Add left-side category tree with expand/collapse functionality
- Add right-side product/kit grid with filtering and search
- Include category navigation with product/kit counts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

myproject/products/templates/products/catalog.html

@@ -0,0 +1,217 @@
+{% extends 'base.html' %}
+
+{% block title %}Каталог{% endblock %}
+
+{% block extra_css %}
+<style>
+    .category-tree {
+        font-size: 0.9rem;
+    }
+    /* Корневые категории без отступов */
+    .category-tree > .category-node {
+        border-left: none;
+        margin-left: 0;
+    }
+    /* Вложенные категории с отступами */
+    .category-children .category-node {
+        border-left: 2px solid #e9ecef;
+        margin-left: 0.5rem;
+    }
+    .category-header {
+        cursor: pointer;
+        padding: 0.5rem 0.75rem;
+        border-radius: 0.25rem;
+        transition: background-color 0.15s;
+        display: flex;
+        align-items: center;
+        gap: 0.5rem;
+    }
+    .category-header:hover {
+        background-color: #f8f9fa;
+    }
+    .category-header.active {
+        background-color: #e7f1ff;
+        color: #0d6efd;
+    }
+    .category-toggle {
+        width: 1.25rem;
+        text-align: center;
+        color: #6c757d;
+        transition: transform 0.2s;
+    }
+    .category-toggle.collapsed {
+        transform: rotate(-90deg);
+    }
+    .category-children {
+        padding-left: 1rem;
+    }
+    .category-items {
+        padding-left: 2rem;
+        border-left: 1px dashed #dee2e6;
+        margin-left: 0.6rem;
+    }
+    .category-item {
+        padding: 0.25rem 0.5rem;
+        font-size: 0.85rem;
+        color: #495057;
+        display: flex;
+        align-items: center;
+        gap: 0.5rem;
+    }
+    .category-item:hover {
+        color: #0d6efd;
+    }
+    .category-item a {
+        text-decoration: none;
+        color: inherit;
+    }
+    .item-badge {
+        font-size: 0.65rem;
+        padding: 0.15rem 0.35rem;
+    }
+</style>
+{% endblock %}
+
+{% block content %}
+<div class="container-fluid mt-4 px-4">
+    <div class="row">
+        <!-- Дерево категорий слева -->
+        <div class="col-lg-3 col-md-4">
+            <div class="card shadow-sm border-0 mb-3">
+                <div class="card-header bg-white py-2 d-flex justify-content-between align-items-center">
+                    <strong><i class="bi bi-folder-tree text-primary"></i> Категории</strong>
+                    <div class="btn-group btn-group-sm">
+                        <button class="btn btn-outline-secondary btn-sm py-0" id="expand-all" title="Развернуть"><i class="bi bi-plus-square"></i></button>
+                        <button class="btn btn-outline-secondary btn-sm py-0" id="collapse-all" title="Свернуть"><i class="bi bi-dash-square"></i></button>
+                    </div>
+                </div>
+                <div class="card-body p-2 category-tree">
+                    {% if category_tree %}
+                        {% for node in category_tree %}
+                            {% include 'products/catalog_tree_node.html' with node=node %}
+                        {% endfor %}
+                    {% else %}
+                        <div class="text-muted text-center py-3">
+                            <i class="bi bi-folder-x"></i> Категорий нет
+                        </div>
+                    {% endif %}
+                </div>
+            </div>
+        </div>
+
+        <!-- Сетка товаров справа -->
+        <div class="col-lg-9 col-md-8">
+            <div class="card shadow-sm border-0">
+                <div class="card-header bg-white py-2 d-flex justify-content-between align-items-center">
+                    <strong><i class="bi bi-grid-3x3-gap text-primary"></i> Товары и комплекты</strong>
+                    <div class="d-flex gap-2 align-items-center">
+                        <input type="text" class="form-control form-control-sm" placeholder="Поиск..." id="catalog-search" style="width: 180px;">
+                        <div class="btn-group btn-group-sm">
+                            <button class="btn btn-primary btn-sm active" data-filter="all">Все</button>
+                            <button class="btn btn-outline-primary btn-sm" data-filter="product">Товары</button>
+                            <button class="btn btn-outline-primary btn-sm" data-filter="kit">Комплекты</button>
+                        </div>
+                    </div>
+                </div>
+                <div class="card-body">
+                    <div class="row g-3" id="catalog-grid">
+                        {% for item in items %}
+                        <div class="col-6 col-lg-4 col-xl-3 catalog-item" data-type="{{ item.item_type }}">
+                            <div class="card h-100 shadow-sm border-0">
+                                <div class="position-relative">
+                                    {% if item.main_photo %}
+                                    <img src="{{ item.main_photo.image.url }}" class="card-img-top" alt="{{ item.name }}" style="height: 120px; object-fit: cover;">
+                                    {% else %}
+                                    <div class="bg-light d-flex align-items-center justify-content-center" style="height: 120px;">
+                                        <i class="bi bi-image text-muted fs-2"></i>
+                                    </div>
+                                    {% endif %}
+                                    <span class="badge position-absolute top-0 end-0 m-1 {% if item.item_type == 'kit' %}bg-info{% else %}bg-secondary{% endif %}" style="font-size: 0.65rem;">
+                                        {% if item.item_type == 'kit' %}К{% else %}Т{% endif %}
+                                    </span>
+                                </div>
+                                <div class="card-body p-2">
+                                    <div class="small text-truncate fw-medium">{{ item.name }}</div>
+                                    <div class="d-flex justify-content-between align-items-center mt-1">
+                                        <span class="fw-bold text-primary small">{{ item.actual_price|floatformat:0 }} ₽</span>
+                                        <small class="text-muted">{{ item.sku }}</small>
+                                    </div>
+                                </div>
+                            </div>
+                        </div>
+                        {% empty %}
+                        <div class="col-12 text-center text-muted py-5">
+                            <i class="bi bi-box-seam fs-1 opacity-25"></i>
+                            <p class="mb-0 mt-2">Каталог пуст</p>
+                        </div>
+                        {% endfor %}
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+
+<script>
+document.addEventListener('DOMContentLoaded', function() {
+    // Раскрытие/сворачивание категорий
+    document.querySelectorAll('.category-header').forEach(header => {
+        header.addEventListener('click', function(e) {
+            e.stopPropagation();
+            const node = this.closest('.category-node');
+            const children = node.querySelector('.category-children');
+            const items = node.querySelector('.category-items');
+            const toggle = this.querySelector('.category-toggle');
+
+            if (children) {
+                children.classList.toggle('d-none');
+            }
+            if (items) {
+                items.classList.toggle('d-none');
+            }
+            if (toggle) {
+                toggle.classList.toggle('collapsed');
+            }
+        });
+    });
+
+    // Развернуть все
+    document.getElementById('expand-all').addEventListener('click', function() {
+        document.querySelectorAll('.category-children, .category-items').forEach(el => el.classList.remove('d-none'));
+        document.querySelectorAll('.category-toggle').forEach(el => el.classList.remove('collapsed'));
+    });
+
+    // Свернуть все
+    document.getElementById('collapse-all').addEventListener('click', function() {
+        document.querySelectorAll('.category-children, .category-items').forEach(el => el.classList.add('d-none'));
+        document.querySelectorAll('.category-toggle').forEach(el => el.classList.add('collapsed'));
+    });
+
+    // Фильтр по типу
+    document.querySelectorAll('[data-filter]').forEach(btn => {
+        btn.addEventListener('click', function() {
+            document.querySelectorAll('[data-filter]').forEach(b => {
+                b.classList.remove('active', 'btn-primary');
+                b.classList.add('btn-outline-primary');
+            });
+            this.classList.add('active', 'btn-primary');
+            this.classList.remove('btn-outline-primary');
+
+            const filter = this.dataset.filter;
+            document.querySelectorAll('.catalog-item').forEach(item => {
+                item.style.display = (filter === 'all' || item.dataset.type === filter) ? '' : 'none';
+            });
+        });
+    });
+
+    // Поиск
+    document.getElementById('catalog-search').addEventListener('input', function() {
+        const query = this.value.toLowerCase();
+        document.querySelectorAll('.catalog-item').forEach(item => {
+            const text = item.textContent.toLowerCase();
+            item.style.display = text.includes(query) ? '' : 'none';
+        });
+    });
+});
+</script>
+{% endblock %}

myproject/products/templates/products/catalog_tree_node.html

@@ -0,0 +1,45 @@
+{% comment %}
+Рекурсивный узел дерева категорий.
+При клике раскрывается и показывает товары/комплекты текстом.
+{% endcomment %}
+<div class="category-node" data-category-id="{{ node.category.pk }}">
+    <div class="category-header">
+        {% if node.children or node.category.products.exists or node.category.kits.exists %}
+            <i class="bi bi-chevron-down category-toggle"></i>
+        {% else %}
+            <i class="bi bi-dot text-muted"></i>
+        {% endif %}
+        <i class="bi bi-folder{% if node.children %}-fill text-warning{% else %}2 text-secondary{% endif %}"></i>
+        <span class="flex-grow-1">{{ node.category.name }}</span>
+        {% with products_count=node.category.products.count kits_count=node.category.kits.count %}
+        {% if products_count or kits_count %}
+            <span class="badge bg-light text-dark border" style="font-size: 0.7rem;">{{ products_count|add:kits_count }}</span>
+        {% endif %}
+        {% endwith %}
+    </div>
+
+    {% if node.children %}
+    <div class="category-children d-none">
+        {% for child in node.children %}
+            {% include 'products/catalog_tree_node.html' with node=child %}
+        {% endfor %}
+    </div>
+    {% endif %}
+
+    {% if node.category.products.exists or node.category.kits.exists %}
+    <div class="category-items d-none">
+        {% for product in node.category.products.all %}
+        <div class="category-item">
+            <span class="badge bg-secondary item-badge">Т</span>
+            <a href="{% url 'products:product-detail' product.pk %}">{{ product.name }}</a>
+        </div>
+        {% endfor %}
+        {% for kit in node.category.kits.all %}
+        <div class="category-item">
+            <span class="badge bg-info item-badge">К</span>
+            <a href="{% url 'products:productkit-detail' kit.pk %}">{{ kit.name }}</a>
+        </div>
+        {% endfor %}
+    </div>
+    {% endif %}
+</div>

myproject/products/templates/products/partials/catalog_product_row.html

@@ -0,0 +1,22 @@
+{% comment %}
+Строка товара/комплекта в дереве каталога.
+{% endcomment %}
+<div class="product-row d-flex align-items-center py-1 px-2 border-bottom" data-type="{{ item.item_type }}" data-id="{{ item.pk }}">
+    <i class="bi bi-grip-vertical drag-handle me-2 text-muted"></i>
+    {% if item.main_photo %}
+        <img src="{{ item.main_photo.image.url }}" class="product-thumb me-2" alt="">
+    {% else %}
+        <div class="product-thumb me-2 bg-light d-flex align-items-center justify-content-center">
+            <i class="bi bi-image text-muted"></i>
+        </div>
+    {% endif %}
+    <div class="flex-grow-1 text-truncate">
+        <a href="{% if item.item_type == 'kit' %}{% url 'products:productkit-detail' item.pk %}{% else %}{% url 'products:product-detail' item.pk %}{% endif %}" class="text-decoration-none small">
+            {{ item.name }}
+        </a>
+        <div class="text-muted" style="font-size: 0.75rem;">{{ item.sku }}</div>
+    </div>
+    <span class="badge {% if item.item_type == 'kit' %}bg-info{% else %}bg-secondary{% endif %} ms-2">
+        {% if item.item_type == 'kit' %}К{% else %}Т{% endif %}
+    </span>
+</div>

myproject/products/templates/products/partials/catalog_tree_node.html

@@ -0,0 +1,25 @@
+{% comment %}
+Рекурсивный шаблон для отображения узла дерева категорий.
+Параметры: nodes - список узлов, level - уровень вложенности
+{% endcomment %}
+{% for node in nodes %}
+<div class="category-node" data-category-id="{{ node.category.pk }}">
+    <div class="category-item d-flex align-items-center p-2 {% if level > 0 %}ps-{{ level|add:2 }}{% endif %}">
+        {% if node.children %}
+            <i class="bi bi-chevron-down category-icon me-2 text-muted"></i>
+        {% else %}
+            <i class="bi bi-dot me-2 text-muted"></i>
+        {% endif %}
+        <i class="bi bi-folder{% if node.children %}-fill text-warning{% else %}2 text-secondary{% endif %} me-2"></i>
+        <span class="flex-grow-1">{{ node.category.name }}</span>
+        <span class="badge bg-light text-dark border ms-2" title="Товаров в категории">
+            {{ node.category.products.count|default:0 }}
+        </span>
+    </div>
+    {% if node.children %}
+    <div class="subcategories">
+        {% include 'products/partials/catalog_tree_node.html' with nodes=node.children level=level|add:1 %}
+    </div>
+    {% endif %}
+</div>
+{% endfor %}

myproject/products/urls.py

@@ -8,7 +8,10 @@ app_name = 'products'
 urlpatterns = [
     # Main unified list for products and kits (default view)
     path('', views.CombinedProductListView.as_view(), name='products-list'),
-    
+
+    # Каталог с drag-n-drop
+    path('catalog/', views.CatalogView.as_view(), name='catalog'),
+
     # Legacy URLs for backward compatibility
     path('all/', views.CombinedProductListView.as_view(), name='all-products'),
     path('products/', views.ProductListView.as_view(), name='product-list-legacy'),

myproject/products/views/__init__.py

@@ -95,6 +95,9 @@ from .configurablekit_views import (
 # API представления
 from .api_views import search_products_and_variants, validate_kit_cost, create_temporary_kit_api, create_tag_api
 
+# Каталог
+from .catalog_views import CatalogView
+
 
 __all__ = [
     # Утилиты
@@ -174,4 +177,7 @@ __all__ = [
     'validate_kit_cost',
     'create_temporary_kit_api',
     'create_tag_api',
+
+    # Каталог
+    'CatalogView',
 ]

myproject/products/views/catalog_views.py

@@ -0,0 +1,52 @@
+"""
+Представление для каталога товаров и комплектов.
+"""
+from django.contrib.auth.mixins import LoginRequiredMixin
+from django.views.generic import TemplateView
+
+from ..models import Product, ProductKit, ProductCategory
+
+
+class CatalogView(LoginRequiredMixin, TemplateView):
+    """Каталог с деревом категорий слева и сеткой товаров справа."""
+    template_name = 'products/catalog.html'
+
+    def build_category_tree(self, categories, parent=None):
+        """Рекурсивно строит дерево категорий с товарами."""
+        tree = []
+        for cat in categories:
+            if cat.parent_id == (parent.pk if parent else None):
+                children = self.build_category_tree(categories, cat)
+                tree.append({
+                    'category': cat,
+                    'children': children,
+                })
+        return tree
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+
+        # Все активные категории
+        categories = list(ProductCategory.objects.filter(
+            is_active=True, is_deleted=False
+        ).prefetch_related('products', 'kits').order_by('name'))
+
+        # Строим дерево
+        category_tree = self.build_category_tree(categories, parent=None)
+
+        # Товары и комплекты для правой панели
+        products = Product.objects.filter(status='active').prefetch_related('photos').order_by('name')
+        for p in products:
+            p.item_type = 'product'
+            p.main_photo = p.photos.order_by('order').first()
+
+        kits = ProductKit.objects.filter(status='active', is_temporary=False).prefetch_related('photos').order_by('name')
+        for k in kits:
+            k.item_type = 'kit'
+            k.main_photo = k.photos.order_by('order').first()
+
+        items = sorted(list(products) + list(kits), key=lambda x: x.name)
+
+        context['category_tree'] = category_tree
+        context['items'] = items
+        return context