feat: configurable bed types via BedTypesContext

- Add BedTypesContext with default types + add/remove/update operations
- Replace hardcoded BED_ITEM_TYPES array in RoomModal with useBedTypes()
- Add "Справочник спальных мест" section to RoomCategoriesPage
  (expandable, same UX as amenities: add icon+label, rename, delete)
- BedItem.type changed from union to string for dynamic support

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/App.tsx

@@ -3,6 +3,7 @@ import { ThemeProvider } from './contexts/ThemeContext'
 import { AuthProvider } from './contexts/AuthContext'
 import { ModulesProvider } from './contexts/ModulesContext'
 import { AmenitiesProvider } from './contexts/AmenitiesContext'
+import { BedTypesProvider } from './contexts/BedTypesContext'
 import { NotificationsProvider } from './contexts/NotificationsContext'
 import { AppLayout } from './layouts/AppLayout'
 import { LoginPage } from './pages/LoginPage'
@@ -45,6 +46,7 @@ export default function App() {
         <ModulesProvider>
           <NotificationsProvider>
           <AmenitiesProvider>
+          <BedTypesProvider>
           <BrowserRouter>
             <Routes>
               {/* Public */}
@@ -89,6 +91,7 @@ export default function App() {
               <Route path="*" element={<Navigate to="/login" replace />} />
             </Routes>
           </BrowserRouter>
+          </BedTypesProvider>
           </AmenitiesProvider>
           </NotificationsProvider>
         </ModulesProvider>