Add WS reconnect logic + connection indicator in calendar

- useHotelSocket: reconnect with exponential backoff (up to 30s), return connected state, log errors to console
- BookingCalendar: show green/gray dot + Online/Offline label in toolbar
- CalendarPage: pass wsConnected prop

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

src/components/calendar/BookingCalendar.tsx

@@ -31,6 +31,7 @@ interface BookingCalendarProps {
   locks?: Map<string, BookingLock>
   onDraftStart?: (roomId: string, checkIn: string, checkOut: string) => void
   onDraftCancel?: (roomId: string) => void
+  wsConnected?: boolean
 }
 
 const CATEGORY_ORDER: Record<string, number> = {
@@ -54,7 +55,7 @@ function getRoomTypeColor(type: string): string {
   return map[type] ?? 'bg-slate-100 text-slate-600 dark:bg-slate-700 dark:text-slate-300'
 }
 
-export function BookingCalendar({ rooms, bookings, onBookingCreate, onBookingUpdate, onBookingBulkUpdate, fadingBookingIds, rentalObjects, rentalBookings, onRentalBookingCreate, locks = new Map(), onDraftStart, onDraftCancel }: BookingCalendarProps) {
+export function BookingCalendar({ rooms, bookings, onBookingCreate, onBookingUpdate, onBookingBulkUpdate, fadingBookingIds, rentalObjects, rentalBookings, onRentalBookingCreate, locks = new Map(), onDraftStart, onDraftCancel, wsConnected }: BookingCalendarProps) {
   const [startDate, setStartDate] = useState(() => startOfDay(new Date()))
   const [visibleDays, setVisibleDays] = useState(DAYS_VISIBLE)
 
@@ -266,6 +267,20 @@ export function BookingCalendar({ rooms, bookings, onBookingCreate, onBookingUpd
           ))}
         </div>
 
+        {/* WebSocket status indicator */}
+        {wsConnected !== undefined && (
+          <div
+            className="flex items-center gap-1.5 px-2 py-1 rounded-lg text-xs text-slate-400 dark:text-slate-500"
+            title={wsConnected ? 'Синхронизация активна' : 'Нет соединения — переподключение...'}
+          >
+            <span className={cn(
+              'w-1.5 h-1.5 rounded-full',
+              wsConnected ? 'bg-emerald-500' : 'bg-slate-300 dark:bg-slate-600 animate-pulse',
+            )} />
+            <span className="hidden sm:inline">{wsConnected ? 'Онлайн' : 'Офлайн'}</span>
+          </div>
+        )}
+
         <button
           onClick={() => setCompact(v => { const next = !v; localStorage.setItem('calendarCompact', String(next)); return next })}
           title={compact ? 'Обычный вид' : 'Компактный вид'}

src/hooks/useHotelSocket.ts

@@ -1,4 +1,4 @@
-import { useEffect, useRef, useCallback } from 'react'
+import { useEffect, useRef, useState, useCallback } from 'react'
 import type { Booking } from '../types'
 
 export type WsMessage =
@@ -15,30 +15,74 @@ interface Options {
 }
 
 export function useHotelSocket({ slug, token, onMessage }: Options) {
-  const wsRef = useRef<WebSocket | null>(null)
-  const cbRef = useRef(onMessage)
-  cbRef.current = onMessage
+  const wsRef    = useRef<WebSocket | null>(null)
+  const cbRef    = useRef(onMessage)
+  cbRef.current  = onMessage
+
+  const [connected, setConnected] = useState(false)
 
   useEffect(() => {
     if (!slug || !token) return
 
-    const base = (import.meta.env.VITE_API_URL as string | undefined) ?? 'https://api.hotelsync.ru'
-    const wsBase = base.replace(/^https/, 'wss').replace(/^http(?!s)/, 'ws')
-    const ws = new WebSocket(`${wsBase}/ws?hotel=${encodeURIComponent(slug)}&token=${encodeURIComponent(token)}`)
-    wsRef.current = ws
+    let destroyed = false
+    let reconnectTimer: ReturnType<typeof setTimeout> | null = null
+    let attempts = 0
 
-    ws.onmessage = (e) => {
-      try { cbRef.current(JSON.parse(e.data as string) as WsMessage) } catch { /* ignore */ }
+    function connect() {
+      if (destroyed) return
+
+      const base   = (import.meta.env.VITE_API_URL as string | undefined) ?? 'https://api.hotelsync.ru'
+      const wsBase = base.replace(/^https/, 'wss').replace(/^http(?!s)/, 'ws')
+      const url    = `${wsBase}/ws?hotel=${encodeURIComponent(slug)}&token=${encodeURIComponent(token!)}`
+
+      const ws = new WebSocket(url)
+      wsRef.current = ws
+
+      ws.onopen = () => {
+        if (destroyed) { ws.close(); return }
+        setConnected(true)
+        attempts = 0
+        console.debug('[WS] connected', slug)
+      }
+
+      ws.onmessage = (e) => {
+        try { cbRef.current(JSON.parse(e.data as string) as WsMessage) } catch { /* ignore */ }
+      }
+
+      ws.onerror = (ev) => {
+        console.warn('[WS] error', ev)
+      }
+
+      ws.onclose = (ev) => {
+        wsRef.current = null
+        setConnected(false)
+        if (destroyed) return
+        const delay = Math.min(1000 * 2 ** attempts, 30_000)
+        attempts++
+        console.debug(`[WS] closed (${ev.code}), reconnecting in ${delay}ms (attempt ${attempts})`)
+        reconnectTimer = setTimeout(connect, delay)
+      }
     }
-    ws.onerror = () => { /* silent */ }
 
-    return () => { ws.close(); wsRef.current = null }
+    connect()
+
+    return () => {
+      destroyed = true
+      if (reconnectTimer) clearTimeout(reconnectTimer)
+      wsRef.current?.close()
+      wsRef.current = null
+      setConnected(false)
+    }
   }, [slug, token])
 
   const send = useCallback((msg: WsMessage) => {
     const ws = wsRef.current
-    if (ws?.readyState === WebSocket.OPEN) ws.send(JSON.stringify(msg))
+    if (ws?.readyState === WebSocket.OPEN) {
+      ws.send(JSON.stringify(msg))
+    } else {
+      console.warn('[WS] send skipped — not connected', msg)
+    }
   }, [])
 
-  return { send }
+  return { send, connected }
 }

src/pages/CalendarPage.tsx

@@ -49,7 +49,7 @@ export function CalendarPage() {
     }
   }, [])
 
-  const { send } = useHotelSocket({ slug, token: session?.token ?? null, onMessage: handleWsMessage })
+  const { send, connected } = useHotelSocket({ slug, token: session?.token ?? null, onMessage: handleWsMessage })
 
   const handleCreate = async (data: Partial<Booking>) => {
     try {
@@ -134,6 +134,7 @@ export function CalendarPage() {
           locks={locks}
           onDraftStart={handleDraftStart}
           onDraftCancel={handleDraftCancel}
+          wsConnected={connected}
         />
       </div>
     </div>