refactor(admin): unify sortable/draggable/repeater list UI

- Add shared sortable-list.css, SORTABLE_LIST_ATTRS and AksSortHandle
- Migrate schema sortable, selected order, inline/modal repeater, sorter,
  floating buttons, footer tabbar and ticket prereply lists to the shared design
- Split AksField.vue (1885 -> 969 lines) into focused components/helpers
- Remove dead AksArrayTable/AksRepeaterField and move-up/down helpers
- Replace hardcoded colors and --n-* vars with --aksrt-color-* tokens

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

assets/admin/src/pages/users/partials/ticket/TicketPrereplyPanel.vue

@@ -19,20 +19,23 @@
     <draggable
       v-else
       v-model="rows"
+      v-bind="SORTABLE_LIST_ATTRS"
       item-key="id"
-      handle=".aksrt-ticket-prereply__handle"
-      :animation="160"
-      class="aksrt-ticket-prereply"
+      class="aksrt-sortable"
     >
       <template #item="{ element, index }">
-        <div class="aksrt-ticket-prereply__row">
-          <span class="aksrt-ticket-prereply__handle" title="拖动排序">⋮⋮</span>
-          <span class="aksrt-ticket-prereply__index">{{ index + 1 }}</span>
-          <span class="aksrt-ticket-prereply__content">{{ element.content }}</span>
-          <n-space size="small">
-            <n-button size="tiny" type="primary" quaternary @click="openEdit(element)">编辑</n-button>
-            <n-button size="tiny" type="error" quaternary @click="handleDelete(element)">删除</n-button>
-          </n-space>
+        <div class="aksrt-sortable__item">
+          <div class="aksrt-sortable__head">
+            <AksSortHandle />
+            <span class="aksrt-sortable__index">{{ index + 1 }}</span>
+            <div class="aksrt-sortable__main">
+              <span class="aksrt-ticket-prereply__content">{{ element.content }}</span>
+            </div>
+            <div class="aksrt-sortable__actions">
+              <n-button size="tiny" type="primary" quaternary @click="openEdit(element)">编辑</n-button>
+              <n-button size="tiny" type="error" quaternary @click="handleDelete(element)">删除</n-button>
+            </div>
+          </div>
         </div>
       </template>
     </draggable>
@@ -71,6 +74,8 @@ import { computed, onMounted, ref } from 'vue'
 import { NButton, NSpace, useDialog, useMessage } from 'naive-ui'
 import draggable from 'vuedraggable'
 import api from '@/api'
+import AksSortHandle from '@/components/form/AksSortHandle.vue'
+import { SORTABLE_LIST_ATTRS } from '@/components/form/sortable-options.js'
 
 const message = useMessage()
 const dialog = useDialog()
@@ -188,38 +193,11 @@ defineExpose({ reload: load })
 </script>
 
 <style scoped>
-.aksrt-ticket-prereply {
-  display: grid;
-  gap: 8px;
-}
-
-.aksrt-ticket-prereply__row {
-  display: grid;
-  grid-template-columns: 20px 28px 1fr auto;
-  align-items: center;
-  gap: 10px;
-  padding: 10px 12px;
-  border: 1px var(--n-border-color, #efeff5) solid;
-  border-radius: 8px;
-  background: var(--n-color, #fff);
-}
-
-.aksrt-ticket-prereply__handle {
-  color: var(--aksrt-color-muted);
-  cursor: grab;
-  user-select: none;
-}
-
-.aksrt-ticket-prereply__index {
-  color: var(--aksrt-color-muted);
-  font-size: 12px;
-  font-variant-numeric: tabular-nums;
-}
-
 .aksrt-ticket-prereply__content {
-  white-space: pre-wrap;
-  word-break: break-word;
+  color: var(--aksrt-color-text, #1F2923);
   font-size: 13px;
   line-height: 1.6;
+  white-space: pre-wrap;
+  word-break: break-word;
 }
 </style>