fix: rental booking buffer applied to end times + phone mask

- getMaxEndHour now subtracts breakHours from next booking's start,
  so you can't book right up to a slot that needs buffer time before it
- effectiveStartHour moved before availableEndHours so equal start/end
  times are no longer possible
- maskPhone (+7 (XXX) XXX-XX-XX) applied to phone field in RentalBookingModal

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

src/components/rental/RentalBookingModal.tsx

@@ -21,6 +21,15 @@ function hourOptions(from: number, to: number): number[] {
   return Array.from({ length: to - from + 1 }, (_, i) => from + i)
 }
 
+function maskPhone(raw: string): string {
+  const d = raw.replace(/\D/g, '').replace(/^8/, '7').replace(/^(?!7)/, '7').slice(0, 11)
+  if (d.length <= 1) return d.length === 0 ? '' : '+7'
+  if (d.length <= 4) return `+7 (${d.slice(1)}`
+  if (d.length <= 7) return `+7 (${d.slice(1, 4)}) ${d.slice(4)}`
+  if (d.length <= 9) return `+7 (${d.slice(1, 4)}) ${d.slice(4, 7)}-${d.slice(7)}`
+  return `+7 (${d.slice(1, 4)}) ${d.slice(4, 7)}-${d.slice(7, 9)}-${d.slice(9, 11)}`
+}
+
 function formatHour(h: number): string {
   return `${h}:00`
 }
@@ -100,21 +109,21 @@ export function RentalBookingModal({
     !timedBookings.some(b => h >= b.startHour && h < b.endHour + breakHours),
   )
 
-  // Max end hour for a given start: limited by the next booking that starts after `start`
+  // Max end hour for a given start: limited by next booking minus buffer
   const getMaxEndHour = (start: number) => {
     const next = timedBookings
       .filter(b => b.startHour >= start + 1)
       .sort((a, b) => a.startHour - b.startHour)[0]
-    return next ? next.startHour : obj.closeHour
+    return next ? next.startHour - breakHours : obj.closeHour
   }
 
-  const availableEndHours = hourOptions(startHour + 1, getMaxEndHour(startHour))
-
   // If current startHour is blocked, snap to first available
   const effectiveStartHour = availableStartHours.includes(startHour)
     ? startHour
     : (availableStartHours[0] ?? obj.openHour)
 
+  const availableEndHours = hourOptions(effectiveStartHour + 1, getMaxEndHour(effectiveStartHour))
+
   const hours = isFullDay
     ? obj.closeHour - obj.openHour
     : Math.max(0, endHour - effectiveStartHour)
@@ -400,7 +409,7 @@ export function RentalBookingModal({
                   className={cn('input pl-8 text-sm', phoneRequired && !guestPhone.trim() && 'border-red-400 focus:ring-red-400')}
                   placeholder={phoneRequired ? '+7 999 000 11 22 (обязательно)' : '+7 999 000 11 22'}
                   value={guestPhone}
-                  onChange={e => setGuestPhone(e.target.value)}
+                  onChange={e => setGuestPhone(maskPhone(e.target.value))}
                 />
               </div>
               {phoneRequired && !guestPhone.trim() && (