统一日期时间选择器为中文

- 全局初始化 dayjs zh-cn，修复日历周/月英文
- 新增 AdminDatePicker / AdminRangePicker 统一格式与占位文案
- 任务、审计、云触手、行业售后等筛选统一使用

apps/frontend/src/components/admin/AdminDatePicker.tsx

@@ -0,0 +1,52 @@
+import { DatePicker } from 'antd'
+import type { DatePickerProps } from 'antd'
+import type { RangePickerProps } from 'antd/es/date-picker'
+
+import {
+  ADMIN_DATE_FORMAT,
+  ADMIN_DATE_RANGE_PLACEHOLDER,
+  ADMIN_DATE_TIME_FORMAT,
+  ADMIN_DATE_TIME_RANGE_PLACEHOLDER,
+} from '@/lib/dayjs'
+
+type AdminDatePickerProps = DatePickerProps
+
+type AdminRangePickerProps = RangePickerProps
+
+/**
+ * 后台统一日期选择：中文 locale（依赖全局 dayjs zh-cn + ConfigProvider zh_CN）。
+ */
+export function AdminDatePicker({
+  format,
+  placeholder = '请选择日期',
+  ...rest
+}: AdminDatePickerProps) {
+  const resolvedFormat =
+    format ?? (rest.showTime ? ADMIN_DATE_TIME_FORMAT : ADMIN_DATE_FORMAT)
+
+  return <DatePicker format={resolvedFormat} placeholder={placeholder} {...rest} />
+}
+
+/**
+ * 后台统一日期范围：默认 YYYY-MM-DD；showTime 时 YYYY-MM-DD HH:mm:ss。
+ */
+export function AdminRangePicker({
+  format,
+  placeholder,
+  ...rest
+}: AdminRangePickerProps) {
+  const withTime = Boolean(rest.showTime)
+  const resolvedFormat = format ?? (withTime ? ADMIN_DATE_TIME_FORMAT : ADMIN_DATE_FORMAT)
+  const resolvedPlaceholder =
+    placeholder ?? (withTime ? ADMIN_DATE_TIME_RANGE_PLACEHOLDER : ADMIN_DATE_RANGE_PLACEHOLDER)
+
+  return (
+    <DatePicker.RangePicker
+      format={resolvedFormat}
+      placeholder={resolvedPlaceholder}
+      {...rest}
+    />
+  )
+}
+
+export default AdminDatePicker