ref: move duplicated ISO date-string detection into shared utility (#42)

* Initial plan

* refactor: share isDateString utility across admin pages

Co-authored-by: RavelloH <68409330+RavelloH@users.noreply.github.com>

* chore: align shared isDateString signature with existing usage

Co-authored-by: RavelloH <68409330+RavelloH@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: RavelloH <68409330+RavelloH@users.noreply.github.com>

Author: Copilot

apps/web/src/app/(admin)/admin/pages/PagesTable.tsx

@@ -22,6 +22,7 @@ import GridTable from "@/components/ui/GridTable";
 import { useNavigateWithTransition } from "@/components/ui/Link";
 import { useBroadcast } from "@/hooks/use-broadcast";
 import runWithAuth from "@/lib/client/run-with-auth";
+import { isDateString } from "@/lib/shared/date-format";
 import { getPageEditorPathByContentType } from "@/lib/shared/page-editor-route";
 import { AlertDialog } from "@/ui/AlertDialog";
 import { Button } from "@/ui/Button";
@@ -102,19 +103,6 @@ interface PageFormState {
   robotsIndex: boolean;
 }
 
-// 判断是否为日期字符串（从 SettingsSheet 复制）
-const isDateString = (value: unknown): boolean => {
-  if (typeof value !== "string") return false;
-
-  // ISO 8601 格式检测
-  const isoDateRegex = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\.\d{3})?Z?$/;
-  if (!isoDateRegex.test(value)) return false;
-
-  // 验证是否为有效日期
-  const date = new Date(value);
-  return !isNaN(date.getTime());
-};
-
 // 获取页面配置字段输入组件配置（参考 SettingsSheet 的 getInputConfig）
 const getPageConfigInputConfig = (
   value: unknown,

apps/web/src/app/(admin)/admin/settings/SettingsSheet.tsx

@@ -13,6 +13,7 @@ import {
 } from "@/data/default-configs";
 import { useBroadcast } from "@/hooks/use-broadcast";
 import runWithAuth from "@/lib/client/run-with-auth";
+import { isDateString } from "@/lib/shared/date-format";
 import generateGradient from "@/lib/shared/gradient";
 import { AutoTransition } from "@/ui/AutoTransition";
 import { Button } from "@/ui/Button";
@@ -500,19 +501,6 @@ export default function SettingSheet() {
     fetchSettings();
   };
 
-  // 判断是否为日期字符串
-  const isDateString = (value: unknown): boolean => {
-    if (typeof value !== "string") return false;
-
-    // ISO 8601 格式检测
-    const isoDateRegex = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\.\d{3})?Z?$/;
-    if (!isoDateRegex.test(value)) return false;
-
-    // 验证是否为有效日期
-    const date = new Date(value);
-    return !isNaN(date.getTime());
-  };
-
   // 获取原始显示值（不考虑编辑状态）
   const getOriginalDisplayValue = (setting: SettingConfig): string => {
     // 提取 default 字段

apps/web/src/lib/shared/date-format.ts

@@ -99,3 +99,17 @@ export function formatDateTimeLocale(date: DateInput, fallback = "-"): string {
     return fallback;
   }
 }
+
+/**
+ * 判断值是否为 ISO 8601 日期字符串
+ * @param value 输入值
+ */
+export function isDateString(value: unknown): boolean {
+  if (typeof value !== "string") return false;
+
+  const isoDateRegex = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\.\d{3})?Z?$/;
+  if (!isoDateRegex.test(value)) return false;
+
+  const date = new Date(value);
+  return !isNaN(date.getTime());
+}