feat(tickets): allow custom status key in status create/edit

- Validate status_key (^[a-z][a-z0-9_]{1,23}$, unique) on create/update
- Renaming a key moves aksrt_ticket.status in the same transaction
- Default statuses remain immutable

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

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

@@ -39,6 +39,22 @@
         <n-form-item label="状态名称" path="name">
           <n-input v-model:value="form.name" placeholder="如：处理中" maxlength="60" show-count />
         </n-form-item>
+        <n-form-item label="标识" path="status_key">
+          <div class="aksrt-status-key">
+            <n-input
+              v-model:value="form.status_key"
+              class="aksrt-status-key__input"
+              :placeholder="editing ? '' : '留空则按名称自动生成'"
+              maxlength="24"
+              show-count
+              :input-props="{ autocomplete: 'off', spellcheck: false }"
+              @blur="form.status_key = normalizeKey(form.status_key)"
+            />
+            <span class="aksrt-ticket-status__hint">
+              小写字母开头，仅含小写字母、数字与下划线（2–24 位）。修改后，使用该状态的工单会同步改为新标识。
+            </span>
+          </div>
+        </n-form-item>
         <n-form-item label="状态颜色" path="color">
           <div class="aksrt-status-color">
             <div class="aksrt-status-color__swatches" role="radiogroup" aria-label="状态颜色">
@@ -132,7 +148,14 @@ const rows = ref([])
 const DEFAULT_COLOR = '#6b7280'
 const HEX_RE = /^#(?:[0-9a-f]{3}|[0-9a-f]{6})$/i
 
-const form = ref({ name: '', color: DEFAULT_COLOR, is_closed: false })
+/** 与 TicketStatusService::KEY_PATTERN 保持一致。 */
+const KEY_RE = /^[a-z][a-z0-9_]{1,23}$/
+
+const form = ref({ name: '', status_key: '', color: DEFAULT_COLOR, is_closed: false })
+
+function normalizeKey(value) {
+  return String(value || '').trim().toLowerCase()
+}
 
 /**
  * 归一化为 TicketStatusService::sanitize_color() 接受的小写 #rgb / #rrggbb；
@@ -149,6 +172,26 @@ const rules = {
     { required: true, message: '请填写状态名称', trigger: 'blur' },
     { max: 60, message: '状态名称不能超过 60 字', trigger: 'blur' },
   ],
+  status_key: [
+    {
+      // 新增时可留空（后端按名称生成）；编辑时必须填写。
+      validator: (_rule, value) => {
+        const key = normalizeKey(value)
+        if (key === '') return !editing.value
+        return KEY_RE.test(key)
+      },
+      message: '标识需以小写字母开头，仅含小写字母、数字与下划线，长度 2–24 位',
+      trigger: ['blur', 'input'],
+    },
+    {
+      validator: (_rule, value) => {
+        const key = normalizeKey(value)
+        return key === '' || !rows.value.some((row) => row.status_key === key && row.id !== editing.value?.id)
+      },
+      message: '该标识已被其他状态使用',
+      trigger: ['blur', 'input'],
+    },
+  ],
   color: [
     {
       validator: (_rule, value) => toHex(value) !== '',
@@ -245,7 +288,7 @@ async function load() {
 
 function openCreate() {
   editing.value = null
-  form.value = { name: '', color: DEFAULT_COLOR, is_closed: false }
+  form.value = { name: '', status_key: '', color: DEFAULT_COLOR, is_closed: false }
   visible.value = true
 }
 
@@ -253,6 +296,7 @@ function openEdit(row) {
   editing.value = row
   form.value = {
     name: String(row.name || ''),
+    status_key: String(row.status_key || ''),
     color: toHex(row.color) || DEFAULT_COLOR,
     is_closed: !!row.is_closed,
   }
@@ -269,6 +313,7 @@ async function handleSubmit() {
   try {
     const payload = {
       name: form.value.name.trim(),
+      status_key: normalizeKey(form.value.status_key),
       color: currentHex.value,
       is_closed: form.value.is_closed ? 1 : 0,
     }
@@ -466,6 +511,18 @@ defineExpose({ reload: load })
   box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.12);
 }
 
+/* —— 弹窗：标识 —— */
+.aksrt-status-key {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  width: 100%;
+}
+
+.aksrt-status-key__input {
+  font-family: var(--n-font-family-mono, ui-monospace, SFMono-Regular, Menlo, Consolas, monospace);
+}
+
 /* —— 弹窗：完结开关 —— */
 .aksrt-status-closed {
   display: flex;