Add centralized amenities directory and hourly booking example

- AmenitiesContext: shared amenities list with add/edit/delete, available app-wide
- RoomsPage: collapsible Справочник удобств section (add/rename/delete)
- RoomModal + RoomCategoriesPage: use amenities from context, no hardcoded lists
- RoomCategoriesPage: removed custom amenity input (use справочник instead)
- mockData: room 103 now has allowHourly=true, added sample hourly booking (today, 10-13ч)

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

src/contexts/AmenitiesContext.tsx

@@ -0,0 +1,38 @@
+import { createContext, useContext, useState } from 'react'
+import type { ReactNode } from 'react'
+
+const DEFAULT_AMENITIES = [
+  'Wi-Fi', 'TV', 'AC', 'Mini-bar', 'Bathrobe', 'Jacuzzi',
+  'Panoramic view', 'Kitchen', 'Washing machine', 'Butler', 'Terrace',
+  'Safe', 'Hairdryer', 'Iron', 'Balcony',
+]
+
+interface AmenitiesContextValue {
+  amenities: string[]
+  addAmenity: (a: string) => void
+  removeAmenity: (a: string) => void
+  renameAmenity: (oldName: string, newName: string) => void
+}
+
+const AmenitiesContext = createContext<AmenitiesContextValue | null>(null)
+
+export function AmenitiesProvider({ children }: { children: ReactNode }) {
+  const [amenities, setAmenities] = useState<string[]>(DEFAULT_AMENITIES)
+
+  const addAmenity    = (a: string)                       => setAmenities(prev => prev.includes(a) ? prev : [...prev, a])
+  const removeAmenity = (a: string)                       => setAmenities(prev => prev.filter(x => x !== a))
+  const renameAmenity = (oldName: string, newName: string) =>
+    setAmenities(prev => prev.map(x => x === oldName ? newName.trim() || x : x))
+
+  return (
+    <AmenitiesContext.Provider value={{ amenities, addAmenity, removeAmenity, renameAmenity }}>
+      {children}
+    </AmenitiesContext.Provider>
+  )
+}
+
+export function useAmenities() {
+  const ctx = useContext(AmenitiesContext)
+  if (!ctx) throw new Error('useAmenities must be used within AmenitiesProvider')
+  return ctx
+}