Decouple cutover HF from portrait and tighten ops UI.

Portrait stays on biz-monitor; cutover create/ensure owns purpose=cutover_hf slots with project collect override, multi-interval bindings, window pause, and industrial detail UX. Also expand ZTE collect/config parsers and TextFSM for route/BGP/L2VPN/VRRP coverage.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/utils/time.ts

@@ -44,3 +44,31 @@ export function formatSystemTime(
     timeZone: systemTimeZone,
   });
 }
+
+/**
+ * `<input type="datetime-local">` (browser system wall clock) → UTC ISO with `Z` for API/DB.
+ * Global deployments store UTC; each operator edits in their local timezone.
+ */
+export function localDatetimeInputToUtcIso(localValue: string): string | null {
+  const v = String(localValue || "").trim();
+  if (!v) return null;
+  const m = /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(?::(\d{2}))?/.exec(v);
+  if (!m) return null;
+  const y = Number(m[1]);
+  const mo = Number(m[2]) - 1;
+  const day = Number(m[3]);
+  const h = Number(m[4]);
+  const mi = Number(m[5]);
+  const sec = Number(m[6] || 0);
+  const local = new Date(y, mo, day, h, mi, sec);
+  if (Number.isNaN(local.getTime())) return null;
+  return local.toISOString();
+}
+
+/** API/DB UTC (naive or `Z`) → `datetime-local` value in the browser system timezone. */
+export function utcIsoToLocalDatetimeInput(iso: string | null | undefined): string {
+  const d = parseApiTime(iso);
+  if (!d) return "";
+  const pad = (n: number) => String(n).padStart(2, "0");
+  return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())}T${pad(d.getHours())}:${pad(d.getMinutes())}`;
+}