fix(staff): format time columns in detail modal

YkStaffDetailModal Col gains optional formatter; baseCustomerCols time cols render via formatTime instead of raw epoch.

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

yunkes/src/components/YkStaffDetailModal.vue

@@ -12,6 +12,8 @@ interface Col {
   width?: number | string
   minWidth?: number | string
   align?: 'left' | 'center' | 'right'
+  /** el-table-column formatter (row, column, cellValue, index) → display string. */
+  formatter?: (row: any, column: any, cellValue: any, index: number) => string
 }
 const props = defineProps<{
   modelValue: boolean
@@ -68,6 +70,7 @@ watch(
         :width="c.width"
         :min-width="c.minWidth"
         :align="c.align"
+        :formatter="c.formatter"
         show-overflow-tooltip
       />
     </el-table>