feat(orders): order detail modal, list actions, use configured prefix

Wire admin payment_order_prefix into order number generation (with 32-char
cap for gateways), make 查看 open a full order-detail modal with
status-aware footer actions, keep type badge top-left only, and right-align
unpaid list actions with countdown on the left.

assets/css/routes/orders.css

@@ -521,6 +521,159 @@
   font-variant-numeric: tabular-nums;
 }
 
+/* Order detail modal content */
+.aksrt-order-detail-dialog {
+  width: min(560px, 100%);
+}
+
+.aksrt-order-detail__list {
+  margin: 0;
+  display: grid;
+  gap: 10px;
+}
+
+.aksrt-order-detail__row {
+  display: grid;
+  grid-template-columns: 96px minmax(0, 1fr);
+  gap: 10px 14px;
+  align-items: start;
+  font-size: 13.5px;
+}
+
+.aksrt-order-detail__row dt {
+  margin: 0;
+  color: var(--color-ink-3, #8b8f97);
+  font-weight: 500;
+}
+
+.aksrt-order-detail__row dd {
+  margin: 0;
+  color: var(--color-ink, #1f2329);
+  font-weight: 600;
+  word-break: break-all;
+  font-variant-numeric: tabular-nums;
+}
+
+.aksrt-order-detail__items,
+.aksrt-order-detail__timeline {
+  margin-top: 16px;
+  padding-top: 14px;
+  border-top: 1px dashed color-mix(in srgb, var(--color-line, #e5e7eb) 85%, transparent);
+}
+
+.aksrt-order-detail__items h4,
+.aksrt-order-detail__timeline h4 {
+  margin: 0 0 10px;
+  font-size: 13.5px;
+  font-weight: 700;
+  color: var(--color-ink, #1f2329);
+}
+
+.aksrt-order-detail__items ul,
+.aksrt-order-detail__timeline ol {
+  margin: 0;
+  padding: 0;
+  list-style: none;
+  display: grid;
+  gap: 8px;
+}
+
+.aksrt-order-detail__items li {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto auto;
+  gap: 10px;
+  align-items: center;
+  font-size: 13px;
+  color: var(--color-ink-2, #4b5563);
+}
+
+.aksrt-order-detail__items li em {
+  font-style: normal;
+  color: var(--color-ink-3, #8b8f97);
+}
+
+.aksrt-order-detail__items li strong {
+  font-weight: 700;
+  color: var(--color-ink, #1f2329);
+  font-variant-numeric: tabular-nums;
+}
+
+.aksrt-order-detail__timeline li {
+  display: grid;
+  grid-template-columns: 140px minmax(0, 1fr);
+  gap: 10px;
+  font-size: 12.5px;
+  color: var(--color-ink-2, #4b5563);
+}
+
+.aksrt-order-detail__timeline time {
+  color: var(--color-ink-3, #8b8f97);
+  font-variant-numeric: tabular-nums;
+}
+
+.aksrt-modal__footer .btn-primary,
+.aksrt-modal__footer .btn-outline,
+.aksrt-modal__footer .btn-ghost,
+.aksrt-modal__footer a.btn-ghost,
+.aksrt-modal__footer a.btn-outline {
+  min-height: 34px;
+  padding: 0 14px;
+  border-radius: 999px;
+  font-size: 13px;
+  font-weight: 600;
+  line-height: 32px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  text-decoration: none;
+  cursor: pointer;
+}
+
+.aksrt-modal__footer .btn-primary {
+  border: 1px solid transparent;
+  background: var(--color-primary, #3b82f6);
+  color: var(--color-on-primary, #fff);
+}
+
+.aksrt-modal__footer .btn-primary.c-green {
+  background: var(--color-success, #16a34a);
+}
+
+.aksrt-modal__footer .btn-outline {
+  border: 1px solid var(--color-line, #e5e7eb);
+  background: var(--surface-1, #fff);
+  color: var(--color-ink-2, #4b5563);
+}
+
+.aksrt-modal__footer .btn-ghost {
+  border: 1px solid transparent;
+  background: transparent;
+  color: var(--color-ink-3, #8b8f97);
+}
+
+@media (max-width: 767px) {
+  .aksrt-order-detail__row {
+    grid-template-columns: 1fr;
+    gap: 2px;
+  }
+
+  .aksrt-order-detail__timeline li {
+    grid-template-columns: 1fr;
+    gap: 2px;
+  }
+
+  .aksrt-modal__footer {
+    flex-wrap: wrap;
+  }
+
+  .aksrt-modal__footer .btn-primary,
+  .aksrt-modal__footer .btn-outline,
+  .aksrt-modal__footer .btn-ghost,
+  .aksrt-modal__footer a {
+    flex: 1 1 auto;
+  }
+}
+
 /* legacy item classes (if any remain) */
 .aksrt-orders-page__item {
   background: var(--surface-1);