feat(webui): add safety confirms and local-time rendering; support install.sh -ui

webui/src/utils/time.ts

@@ -0,0 +1,49 @@
+type DateLike = string | number | Date | null | undefined;
+
+function parseDateLike(value: DateLike): Date | null {
+  if (value == null) return null;
+  if (value instanceof Date) {
+    return Number.isNaN(value.getTime()) ? null : value;
+  }
+  if (typeof value === 'number') {
+    const d = new Date(value);
+    return Number.isNaN(d.getTime()) ? null : d;
+  }
+  const s = String(value).trim();
+  if (!s) return null;
+
+  if (/^\d+$/.test(s)) {
+    const n = Number(s);
+    const ms = n > 1e12 ? n : n * 1000;
+    const d = new Date(ms);
+    return Number.isNaN(d.getTime()) ? null : d;
+  }
+
+  const d = new Date(s);
+  return Number.isNaN(d.getTime()) ? null : d;
+}
+
+export function formatLocalDateTime(value: DateLike, fallback = '-'): string {
+  const d = parseDateLike(value);
+  if (!d) {
+    const raw = value == null ? '' : String(value).trim();
+    return raw || fallback;
+  }
+  return d.toLocaleString();
+}
+
+export function formatLocalTime(value: DateLike, fallback = '--:--:--'): string {
+  const d = parseDateLike(value);
+  if (!d) {
+    const raw = value == null ? '' : String(value).trim();
+    return raw || fallback;
+  }
+  return d.toLocaleTimeString();
+}
+
+export function localDateInputValue(base = new Date()): string {
+  const d = new Date(base.getTime());
+  d.setMinutes(d.getMinutes() - d.getTimezoneOffset());
+  return d.toISOString().slice(0, 10);
+}
+