feat: move pricelists to admin pricing tab\n\n- Removed separate 'Прайслисты' link from navigation\n- Added 4th tab 'Прайслисты' to admin_pricing.html\n- Moved pricelists table, create modal, and CRUD functionality to admin pricing\n- Updated /pricelists route to redirect to /admin/pricing?tab=pricelists\n\nFixes task 2: Прайслисты → вкладка в "Администратор цен"

web/templates/base.html

@@ -19,7 +19,6 @@
                 <div class="flex items-center space-x-8">
                     <a href="/" class="text-xl font-bold text-blue-600">QuoteForge</a>
                     <div class="hidden md:flex space-x-4">
-                        <a href="/pricelists" class="text-gray-600 hover:text-gray-900 px-3 py-2 text-sm">Прайслисты</a>
                         <a href="/configurator" class="text-gray-600 hover:text-gray-900 px-3 py-2 text-sm">Конфигуратор</a>
                         <a id="admin-pricing-link" href="/admin/pricing" class="text-gray-600 hover:text-gray-900 px-3 py-2 text-sm hidden">Администратор цен</a>
                         <a href="/setup" class="text-gray-600 hover:text-gray-900 px-3 py-2 text-sm">Настройки</a>