Improve error emails and invoice mailto with full order details

Admin error email now includes: Square error code, category, and
detail string; full customer name/email/phone; fulfillment type,
address, date/time, and delivery instructions; per-item options,
colors, and notes; itemised price breakdown with delivery and
estimated tax; idempotency key for debugging.

Customer invoice mailto now includes: full name/email/phone; per-item
options, colors, and notes; delivery date, address, and instructions;
itemised subtotal/delivery/tax/total breakdown.

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

estore/src/app/api/checkout/route.ts

@@ -515,21 +515,51 @@ export async function POST(req: NextRequest) {
             if (li.note)              parts.push(`    Note: ${li.note}`)
             return parts.join('\n')
           }).join('\n')
-          const fulfillmentStr = deliveryAddress
+
-            ? `Delivery to ${deliveryAddress}${deliverySlotISO ? ` at ${new Date(deliverySlotISO).toLocaleString('en-US', { timeZone: 'America/New_York', dateStyle: 'medium', timeStyle: 'short' })}` : ''}`
+          const fmtET = (iso: string) =>
-            : pickupSlotISO ? `Pickup at ${new Date(pickupSlotISO).toLocaleString('en-US', { timeZone: 'America/New_York', dateStyle: 'medium', timeStyle: 'short' })}` : 'Unknown'
+            new Date(iso).toLocaleString('en-US', { timeZone: 'America/New_York', dateStyle: 'full', timeStyle: 'short' })
+
+          const fulfillmentLines = deliveryAddress
+            ? [
+                `Type:         Delivery`,
+                `Address:      ${deliveryAddress}`,
+                deliverySlotISO ? `Date/time:    ${fmtET(deliverySlotISO)}` : null,
+                deliveryNotes   ? `Instructions: ${deliveryNotes}`           : null,
+              ].filter(Boolean)
+            : pickupSlotISO
+              ? [`Type:      Pickup`, `Date/time: ${fmtET(pickupSlotISO)}`]
+              : [`Type: Unknown`]
+
+          const itemSubtotal = lineItems.reduce((s, li) => s + li.priceCents * li.quantity, 0)
+          const estTax       = Math.round(itemSubtotal * 0.0635)
+          const estTotal     = itemSubtotal + (deliveryCents ?? 0) + estTax
+
+          const squareDetail = squareErrors?.[0]?.detail ?? ''
+          const squareCat    = squareErrors?.[0]?.category ?? ''
+
           await sendAdminErrorAlert({
             subject: 'Checkout error',
             message: [
-              err instanceof Error ? err.message : String(err),
+              `Error code:   ${code || '(none)'}`,
+              squareCat    ? `Category:     ${squareCat}`    : null,
+              squareDetail ? `Detail:       ${squareDetail}` : null,
               '',
-              `Customer: ${customerName ?? '(unknown)'} <${customerEmail ?? '(none)'}>  ${customerPhone ?? ''}`,
+              `Customer:  ${customerName    ?? '(unknown)'}`,
-              `${fulfillmentStr}`,
+              `Email:     ${customerEmail   ?? '(none)'}`,
+              `Phone:     ${customerPhone   ?? '(none)'}`,
+              '',
+              ...fulfillmentLines,
               '',
               'Order:',
               itemLines,
-            ].join('\n'),
+              '',
-            context: { code: code || '(none)' },
+              `Items:     $${(itemSubtotal / 100).toFixed(2)}`,
+              deliveryCents ? `Delivery:  $${(deliveryCents / 100).toFixed(2)}` : null,
+              `Est. tax:  $${(estTax / 100).toFixed(2)}`,
+              `Est. total: $${(estTotal / 100).toFixed(2)}`,
+              idempotencyKey ? `\nIdempotency key: ${idempotencyKey}` : null,
+            ].filter(Boolean).join('\n'),
+            context: {},
           })
         } catch { /* best effort */ }
       })()

estore/src/components/PaymentForm.tsx

@@ -82,6 +82,9 @@ const SDK_URL =
 
 function buildMailtoLink(payload: CheckoutPayload): string {
   const fmtCents = (c: number) => `$${(c / 100).toFixed(2)}`
+  const fmtDate  = (iso: string) =>
+    new Date(iso).toLocaleString('en-US', { dateStyle: 'full', timeStyle: 'short' })
+
   const items = payload.lineItems
     .map((li) => {
       const lines = [`  • ${li.quantity}× ${li.name} — ${fmtCents(li.priceCents * li.quantity)}`]
@@ -91,11 +94,28 @@ function buildMailtoLink(payload: CheckoutPayload): string {
       return lines.join('\n')
     })
     .join('\n')
-  const fulfillment = payload.deliverySlotISO
+
-    ? `Delivery: ${new Date(payload.deliverySlotISO).toLocaleString('en-US', { dateStyle: 'medium', timeStyle: 'short' })} to ${payload.deliveryAddress ?? ''}`
+  const fulfillmentLines: string[] = payload.deliverySlotISO
+    ? [
+        `Delivery date: ${fmtDate(payload.deliverySlotISO)}`,
+        `Address:       ${payload.deliveryAddress ?? '(not set)'}`,
+        ...(payload.deliveryNotes ? [`Instructions:  ${payload.deliveryNotes}`] : []),
+      ]
     : payload.pickupSlotISO
-      ? `Pickup: ${new Date(payload.pickupSlotISO).toLocaleString('en-US', { dateStyle: 'medium', timeStyle: 'short' })}`
+      ? [`Pickup: ${fmtDate(payload.pickupSlotISO)}`]
-      : 'Fulfillment: not set'
+      : [`Fulfillment: not set`]
+
+  const itemSubtotal  = payload.lineItems.reduce((s, li) => s + li.priceCents * li.quantity, 0)
+  const deliveryCents = payload.deliveryCents ?? 0
+  const estTax        = Math.round(itemSubtotal * 0.0635)
+
+  const priceLines = [
+    `Items:    ${fmtCents(itemSubtotal)}`,
+    deliveryCents ? `Delivery: ${fmtCents(deliveryCents)}` : null,
+    `Est. tax: ${fmtCents(estTax)}`,
+    `Total:    ${fmtCents(payload.grandTotal)}`,
+  ].filter(Boolean).join('\n')
+
   const body = [
     `Hi Beach Party Balloons,`,
     ``,
@@ -108,8 +128,9 @@ function buildMailtoLink(payload: CheckoutPayload): string {
     `Order:`,
     items,
     ``,
-    fulfillment,
+    ...fulfillmentLines,
-    `Total: ${fmtCents(payload.grandTotal)}`,
+    ``,
+    priceLines,
   ].join('\n')
 
   const addr = atob('aW5mb0BiZWFjaHBhcnR5YmFsbG9vbnMuY29t')