feat: add user roles management UI with owner access control

- Added role management views (list, create, edit, delete)
- Created user_roles URL routing
- Added role management templates with Bootstrap styling
- Updated navbar with Roles link for owners and superusers
- Enhanced decorators and mixins with superuser bypass
- Added assign_owner_role.py utility script

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

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

myproject/user_roles/templates/user_roles/user_role_create.html

@@ -0,0 +1,64 @@
+{% extends "base.html" %}
+
+{% block title %}Добавить пользователя{% endblock %}
+
+{% block content %}
+<div class="container mt-4">
+    <div class="row justify-content-center">
+        <div class="col-md-6">
+            <div class="card">
+                <div class="card-header">
+                    <h4 class="mb-0">Добавить пользователя</h4>
+                </div>
+                <div class="card-body">
+                    {% if messages %}
+                        {% for message in messages %}
+                            <div class="alert alert-{{ message.tags }} alert-dismissible fade show" role="alert">
+                                {{ message }}
+                                <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
+                            </div>
+                        {% endfor %}
+                    {% endif %}
+
+                    <form method="post">
+                        {% csrf_token %}
+
+                        <div class="mb-3">
+                            <label for="email" class="form-label">Email *</label>
+                            <input type="email" class="form-control" id="email" name="email" required>
+                            <div class="form-text">Email пользователя для входа</div>
+                        </div>
+
+                        <div class="mb-3">
+                            <label for="name" class="form-label">Имя *</label>
+                            <input type="text" class="form-control" id="name" name="name" required>
+                            <div class="form-text">Полное имя пользователя</div>
+                        </div>
+
+                        <div class="mb-3">
+                            <label for="role" class="form-label">Роль *</label>
+                            <select class="form-select" id="role" name="role" required>
+                                <option value="">Выберите роль...</option>
+                                {% for role in roles %}
+                                    <option value="{{ role.code }}">{{ role.name }} - {{ role.description }}</option>
+                                {% endfor %}
+                            </select>
+                        </div>
+
+                        <div class="mb-3">
+                            <label for="password" class="form-label">Пароль</label>
+                            <input type="text" class="form-control" id="password" name="password">
+                            <div class="form-text">Оставьте пустым для автогенерации. Пароль будет показан после создания.</div>
+                        </div>
+
+                        <div class="d-flex justify-content-between">
+                            <a href="{% url 'user_roles:list' %}" class="btn btn-secondary">Отмена</a>
+                            <button type="submit" class="btn btn-primary">Создать пользователя</button>
+                        </div>
+                    </form>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+{% endblock %}