feat: configurable booking lead time in admin (default 48h)

Adds leadTimeHours to HoursConfig. Slot generation, calendar minDate,
and pickup disabled-date precomputation all read from the config.
Admin hours page has a new input to adjust it without a redeploy.

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

estore/src/app/admin/page.tsx

@@ -281,6 +281,26 @@ function HoursEditor() {
         </div>
       ))}
 
+      <div style={{ marginBottom: '1.5rem' }}>
+        <label style={{ fontWeight: 600, fontSize: '0.85rem', display: 'block', marginBottom: '0.4rem' }}>
+          Booking lead time (hours)
+        </label>
+        <p style={{ fontSize: '0.78rem', color: '#888', marginBottom: '0.5rem' }}>
+          Minimum notice required before a delivery or pickup can be booked. Dates within this window are greyed out on the calendar.
+        </p>
+        <input
+          type="number"
+          className="input is-small"
+          min={1}
+          max={168}
+          step={1}
+          value={config.leadTimeHours ?? 48}
+          onChange={(e) => setConfig((prev) => prev ? { ...prev, leadTimeHours: Math.max(1, parseInt(e.target.value) || 48) } : prev)}
+          style={{ width: 100 }}
+        />
+        <span style={{ marginLeft: 8, fontSize: '0.82rem', color: '#666' }}>hours</span>
+      </div>
+
       <div style={{ marginBottom: '1.5rem' }}>
         <label style={{ fontWeight: 600, fontSize: '0.85rem', display: 'block', marginBottom: '0.4rem' }}>
           Delivery arrival window (minutes)

estore/src/components/CartDrawer.tsx

@@ -196,7 +196,8 @@ export default function CartDrawer() {
   const fullAddress  = [street, city, state, zip].filter(Boolean).join(', ')
   const canQuote     = street.trim() && city.trim()
   const pickupSlots  = useMemo(() => getPickupSlots(pickupDate, hoursConfig), [pickupDate, hoursConfig])
-  const todayStr     = new Date(Date.now() + 24 * 60 * 60 * 1000).toISOString().slice(0, 10)
+  const leadMs       = (hoursConfig?.leadTimeHours ?? 48) * 60 * 60 * 1000
+  const todayStr     = new Date(Date.now() + leadMs).toISOString().slice(0, 10)
   const maxDateStr   = new Date(Date.now() + 90 * 86400_000).toISOString().slice(0, 10)
 
   // Unit price — uses selected variation price if set, otherwise product default
@@ -221,13 +222,13 @@ export default function CartDrawer() {
   // Pre-compute pickup disabled dates (closed days) for the next 90 days
   const pickupDisabledDates = useMemo(() => {
     const disabled = new Set<string>()
-    const base = Date.now() + 24 * 60 * 60 * 1000  // start from tomorrow
+    const base = Date.now() + leadMs
     for (let i = 0; i < 90; i++) {
       const d = new Date(base + i * 86400_000).toISOString().slice(0, 10)
       if (getPickupSlots(d, hoursConfig).length === 0) disabled.add(d)
     }
     return disabled
-  }, [hoursConfig])
+  }, [hoursConfig, leadMs])
 
   const CT_TAX_RATE   = 0.0635
   const subtotal      = entries.reduce((sum, e) => sum + entryUnitPrice(e) * e.quantity, 0)

estore/src/components/DeliveryDatePicker.tsx

@@ -23,7 +23,6 @@ interface Props {
 
 type SlotState = 'idle' | 'loading' | 'loaded' | 'error'
 
-const minDate = new Date(Date.now() + 24 * 60 * 60 * 1000).toISOString().slice(0, 10)
 const maxDate = new Date(Date.now() + 90 * 86400_000).toISOString().slice(0, 10)
 
 export default function DeliveryDatePicker({ address, tier, value, onChange }: Props) {
@@ -32,6 +31,7 @@ export default function DeliveryDatePicker({ address, tier, value, onChange }: P
   const [drive,        setDrive]        = useState(0)
   const [status,       setStatus]       = useState<SlotState>('idle')
   const [errMsg,       setErrMsg]       = useState('')
+  const [leadTimeHours, setLeadTimeHours] = useState(48)
 
   // Dates that returned 0 slots — shown as strikethrough on the calendar
   const [noSlotDates, setNoSlotDates] = useState<Set<string>>(new Set())
@@ -39,14 +39,18 @@ export default function DeliveryDatePicker({ address, tier, value, onChange }: P
   // Busy dates from CalDAV — shown with an orange dot
   const [busyDates, setBusyDates] = useState<Set<string>>(new Set())
 
+  const minDate = new Date(Date.now() + leadTimeHours * 60 * 60 * 1000).toISOString().slice(0, 10)
+
   // Pre-mark all closed delivery days from admin hours config
   useEffect(() => {
     fetch(`${BASE}/api/hours`)
       .then(r => r.ok ? r.json() : null)
       .then((config: HoursConfig | null) => {
         if (!config) return
+        const lead   = config.leadTimeHours ?? 48
+        setLeadTimeHours(lead)
         const closed = new Set<string>()
-        const start  = Date.now() + 24 * 60 * 60 * 1000
+        const start  = Date.now() + lead * 60 * 60 * 1000
         for (let i = 0; i < 90; i++) {
           const dateStr = new Date(start + i * 86400_000).toISOString().slice(0, 10)
           const dow     = new Date(`${dateStr}T12:00:00Z`).getUTCDay()

estore/src/lib/hours-config.ts

@@ -11,10 +11,12 @@ export interface HoursConfig {
   delivery:              WeekHours
   pickup:                WeekHours
   deliveryWindowMinutes: number   // customer-facing arrival window (email + Square)
+  leadTimeHours:         number   // minimum hours in advance a slot can be booked
 }
 
 export const DEFAULT_HOURS: HoursConfig = {
   deliveryWindowMinutes: 60,
+  leadTimeHours:         48,
   delivery: {
     '0': { open:  480, close: 1020 },  // Sun  8:00 AM –  5:00 PM
     '1': null,                          // Mon  closed

estore/src/lib/hours.ts

@@ -17,6 +17,7 @@ export function getHoursConfig(): HoursConfig {
       delivery:              { ...DEFAULT_HOURS.delivery, ...(saved.delivery ?? {}) },
       pickup:                { ...DEFAULT_HOURS.pickup,   ...(saved.pickup   ?? {}) },
       deliveryWindowMinutes: saved.deliveryWindowMinutes ?? DEFAULT_HOURS.deliveryWindowMinutes,
+      leadTimeHours:         saved.leadTimeHours         ?? DEFAULT_HOURS.leadTimeHours,
     }
   } catch {
     return DEFAULT_HOURS

estore/src/lib/slots.ts

@@ -111,7 +111,8 @@ export async function getAvailableSlots(
   const closeTotalMin = hours.close
   const closeUTC      = etToUtc(date, Math.floor(hours.close / 60), hours.close % 60)
 
-  const cutoffUTC = new Date(Date.now() + 24 * 60 * 60_000)
+  const leadMs     = (hoursConfig ?? DEFAULT_HOURS).leadTimeHours * 60 * 60_000
+  const cutoffUTC  = new Date(Date.now() + leadMs)
 
   for (let arrivalTotalMin = openTotalMin; arrivalTotalMin < closeTotalMin; arrivalTotalMin += SLOT_STEP) {
     const arrivalH   = Math.floor(arrivalTotalMin / 60)
@@ -120,7 +121,7 @@ export async function getAvailableSlots(
     const departUTC  = new Date(arrivalUTC.getTime() - driveMinutes * 60_000)
     const returnUTC  = new Date(departUTC.getTime() + blockMinutes * 60_000)
 
-    if (arrivalUTC < cutoffUTC) continue   // enforce 24-hour lead time
+    if (arrivalUTC < cutoffUTC) continue   // enforce lead time
     if (returnUTC > closeUTC) break
 
     // Reject any slot whose full driver block overlaps an existing event
@@ -164,14 +165,15 @@ export function getPickupSlots(date: string, hoursConfig?: HoursConfig): TimeSlo
   const openTotalMins  = hours.open
   const closeTotalMins = hours.close
 
-  const cutoffUTC = new Date(Date.now() + 24 * 60 * 60_000)
+  const leadMs    = (hoursConfig ?? DEFAULT_HOURS).leadTimeHours * 60 * 60_000
+  const cutoffUTC = new Date(Date.now() + leadMs)
 
   const slots: TimeSlot[] = []
   for (let total = openTotalMins; total < closeTotalMins; total += SLOT_STEP) {
     const h       = Math.floor(total / 60)
     const m       = total % 60
     const slotUTC = etToUtc(date, h, m)
-    if (slotUTC < cutoffUTC) continue   // enforce 24-hour lead time
+    if (slotUTC < cutoffUTC) continue   // enforce lead time
     slots.push({ startISO: slotUTC.toISOString(), label: fmtLabel(h, m) })
   }
   return slots