Fix drag-to-move and WS keepalive

drag-to-move: use window-level mousemove/mouseup listeners for reliable
drag detection — React synthetic events on container were unreliable

WS keepalive: server sends ping JSON every 25s so nginx proxy_read_timeout
never fires; client ignores pings (not broadcast to peers anymore)

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

backend/src/routes/ws.ts

@@ -6,6 +6,8 @@ import type { RawData } from 'ws'
 // hotel slug → set of connected streams
 const hotelRooms = new Map<string, Set<SocketStream>>()
 
+const PING_INTERVAL_MS = 25_000 // ping every 25s — keeps nginx proxy_read_timeout alive
+
 const ws: FastifyPluginAsync = async (fastify) => {
   await fastify.register(fastifyWebsocket)
 
@@ -19,8 +21,21 @@ const ws: FastifyPluginAsync = async (fastify) => {
       if (!hotelRooms.has(hotel)) hotelRooms.set(hotel, new Set())
       hotelRooms.get(hotel)!.add(connection)
 
+      // Send periodic ping so nginx proxy_read_timeout never fires
+      const pingTimer = setInterval(() => {
+        if (connection.socket.readyState === 1) {
+          connection.socket.send(JSON.stringify({ type: 'ping' }))
+        }
+      }, PING_INTERVAL_MS)
+
       connection.socket.on('message', (raw: RawData) => {
         const data = raw.toString()
+        // Ignore client pings — no need to broadcast them
+        try {
+          const msg = JSON.parse(data) as { type?: string }
+          if (msg.type === 'ping') return
+        } catch { /* not JSON, fall through */ }
+
         const peers = hotelRooms.get(hotel)
         if (!peers) return
         peers.forEach(peer => {
@@ -31,6 +46,7 @@ const ws: FastifyPluginAsync = async (fastify) => {
       })
 
       connection.socket.on('close', () => {
+        clearInterval(pingTimer)
         hotelRooms.get(hotel)?.delete(connection)
         if (hotelRooms.get(hotel)?.size === 0) hotelRooms.delete(hotel)
       })

src/components/calendar/BookingCalendar.tsx

@@ -83,13 +83,9 @@ export function BookingCalendar({ rooms, bookings, onBookingCreate, onBookingUpd
   // Drag-to-move booking state
   const [movingBooking, setMovingBooking] = useState<Booking | null>(null)
   const [moveTargetRoomId, setMoveTargetRoomId] = useState<string | null>(null)
-  const pendingMoveBooking = useRef<Booking | null>(null)
-  const moveStartPos = useRef<{ x: number; y: number } | null>(null)
   const movingBookingRef = useRef<Booking | null>(null)
-  const moveTargetRoomIdRef = useRef<string | null>(null)
   const didDragRef = useRef(false)
   movingBookingRef.current = movingBooking
-  moveTargetRoomIdRef.current = moveTargetRoomId
 
   // Compact mode (default from Settings → Appearance)
   const [compact, setCompact] = useState(
@@ -141,7 +137,7 @@ export function BookingCalendar({ rooms, bookings, onBookingCreate, onBookingUpd
 
   const handleCellMouseDown = useCallback((roomId: string, dayIdx: number, e: React.MouseEvent) => {
     if (e.button !== 0) return
-    if (pendingMoveBooking.current || movingBookingRef.current) return
+    if (movingBookingRef.current) return
     e.preventDefault()
     setDragStart({ roomId, dayIdx })
     setDragEnd(dayIdx)
@@ -152,50 +148,7 @@ export function BookingCalendar({ rooms, bookings, onBookingCreate, onBookingUpd
     setDragEnd(dayIdx)
   }, [dragStart])
 
-  const handleMouseMove = useCallback((e: React.MouseEvent) => {
-    // Phase 1: detect drag start
-    if (pendingMoveBooking.current && !movingBookingRef.current) {
-      const dx = Math.abs(e.clientX - (moveStartPos.current?.x ?? 0))
-      const dy = Math.abs(e.clientY - (moveStartPos.current?.y ?? 0))
-      if (dx > 5 || dy > 5) {
-        setMovingBooking(pendingMoveBooking.current)
-        setMoveTargetRoomId(pendingMoveBooking.current.roomId)
-      }
-      return
-    }
-    // Phase 2: track which room row the cursor is over
-    if (movingBookingRef.current) {
-      const el = document.elementFromPoint(e.clientX, e.clientY)
-      const rowEl = el?.closest('[data-room-id]') as HTMLElement | null
-      if (rowEl?.dataset.roomId) {
-        setMoveTargetRoomId(rowEl.dataset.roomId)
-      }
-    }
-  }, [])
-
   const handleMouseUp = useCallback(() => {
-    const mb = movingBookingRef.current
-    const targetRoom = moveTargetRoomIdRef.current
-
-    if (mb) {
-      // Was dragging a booking to another room
-      if (targetRoom && targetRoom !== mb.roomId) {
-        didDragRef.current = true
-        onBookingUpdate(mb.id, { roomId: targetRoom })
-      }
-      setMovingBooking(null)
-      setMoveTargetRoomId(null)
-      pendingMoveBooking.current = null
-      moveStartPos.current = null
-      return
-    }
-
-    // No drag — clear pending refs; onClick on booking block will open the panel
-    if (pendingMoveBooking.current) {
-      pendingMoveBooking.current = null
-      moveStartPos.current = null
-    }
-
     if (!dragStart || dragEnd === null) return
     const minDay = Math.min(dragStart.dayIdx, dragEnd)
     const maxDay = Math.max(dragStart.dayIdx, dragEnd)
@@ -225,7 +178,7 @@ export function BookingCalendar({ rooms, bookings, onBookingCreate, onBookingUpd
   }
 
   return (
-    <div className="flex flex-col h-full" onMouseUp={handleMouseUp} onMouseLeave={handleMouseUp} onMouseMove={handleMouseMove}>
+    <div className="flex flex-col h-full" onMouseUp={handleMouseUp} onMouseLeave={handleMouseUp}>
       {/* Toolbar */}
       <div className="flex items-center gap-3 px-4 py-3 border-b border-slate-200 dark:border-slate-700 bg-white dark:bg-slate-800 shrink-0 flex-wrap gap-y-2">
         <div className="flex items-center gap-1.5">
@@ -523,8 +476,39 @@ export function BookingCalendar({ rooms, bookings, onBookingCreate, onBookingUpd
                             if (e.button !== 0) return
                             e.stopPropagation()
                             e.preventDefault()
-                            pendingMoveBooking.current = booking
-                            moveStartPos.current = { x: e.clientX, y: e.clientY }
+                            const startX = e.clientX
+                            const startY = e.clientY
+                            let dragging = false
+                            const onMove = (ev: MouseEvent) => {
+                              if (!dragging) {
+                                if (Math.abs(ev.clientX - startX) > 5 || Math.abs(ev.clientY - startY) > 5) {
+                                  dragging = true
+                                  setMovingBooking(booking)
+                                  setMoveTargetRoomId(booking.roomId)
+                                }
+                                return
+                              }
+                              const el = document.elementFromPoint(ev.clientX, ev.clientY)
+                              const row = el?.closest('[data-room-id]') as HTMLElement | null
+                              if (row?.dataset.roomId) setMoveTargetRoomId(row.dataset.roomId)
+                            }
+                            const onUp = (ev: MouseEvent) => {
+                              window.removeEventListener('mousemove', onMove)
+                              window.removeEventListener('mouseup', onUp)
+                              if (dragging) {
+                                const el = document.elementFromPoint(ev.clientX, ev.clientY)
+                                const row = el?.closest('[data-room-id]') as HTMLElement | null
+                                const targetRoomId = row?.dataset.roomId
+                                if (targetRoomId && targetRoomId !== booking.roomId) {
+                                  didDragRef.current = true
+                                  onBookingUpdate(booking.id, { roomId: targetRoomId })
+                                }
+                                setMovingBooking(null)
+                                setMoveTargetRoomId(null)
+                              }
+                            }
+                            window.addEventListener('mousemove', onMove)
+                            window.addEventListener('mouseup', onUp)
                           }}
                           onClick={(e) => {
                             e.stopPropagation()