new file: backend/src/controllers/schemaController.ts

new file:   backend/src/migrations/008_add_database_schemas.sql
	modified:   backend/src/routes/sqlInterface.ts
	modified:   frontend/package.json
	modified:   frontend/src/App.tsx
	modified:   frontend/src/components/Sidebar.tsx
	new file:   frontend/src/pages/DatabaseSchema.tsx
	modified:   frontend/src/services/api.ts

frontend/src/components/Sidebar.tsx

@@ -1,10 +1,11 @@
 import { NavLink } from 'react-router-dom';
-import { Book, Home, Key, Folder, Settings, FileCode, FileText, ExternalLink, Database } from 'lucide-react';
+import { Book, Home, Key, Folder, Settings, FileCode, FileText, ExternalLink, Database, GitBranch } from 'lucide-react';
 import { cn } from '@/utils/cn';
 
 const navItems = [
   { to: '/', icon: Home, label: 'Главная' },
   { to: '/workbench', icon: Database, label: 'SQL интерфейс' },
+  { to: '/schema', icon: GitBranch, label: 'Схема БД' },
   { to: '/endpoints', icon: FileCode, label: 'Эндпоинты' },
   { to: '/folders', icon: Folder, label: 'Папки' },
   { to: '/api-keys', icon: Key, label: 'API Ключи' },