fix(web-ui): display all human-facing timestamps in Asia/Jerusalem (deterministic)

Storage stays UTC (DB TIMESTAMPTZ, API ISO-UTC) — only the display layer is
localized, and now deterministically: every timestamp renders pinned to
Asia/Jerusalem via a single Intl-based formatter, so SSR (UTC container) and
the browser agree on any runtime. No layout/visible-format change — only the tz.

- New single date formatter web-ui/src/lib/format-date.ts (G2): formatDate /
  formatDateShort / formatDateLong / formatDateTime / formatDateTimeFull /
  formatTime / formatIsoDate + Israel helpers getIsraelYear / israelDayKey /
  israelMidnightMs / israelParts + formatRelative (long/short/tight wording).
- Routed all ad-hoc toLocaleDateString/toLocaleTimeString/toLocaleString +
  hand-rolled new Date(...).get*() / toISOString().slice(0,10) timestamp call
  sites (30 files) through it. Number toLocaleString left untouched.
- Spec: added INV-UI9 to docs/spec/X6 (UTC storage, Asia/Jerusalem display).

Display-only; no layout/design/IA change → Claude Design gate N/A.
Invariants: G2 (single date formatter, no parallel ad-hoc formatting), INV-UI9.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web-ui/src/app/operations/page.tsx

@@ -36,6 +36,7 @@ import {
   type SubscriptionUsage,
   type UsageWindow,
 } from "@/lib/api/operations";
+import { formatTime, israelParts } from "@/lib/format-date";
 
 function mb(bytes: number): string {
   return `${Math.round((bytes || 0) / 1024 / 1024)}MB`;
@@ -46,8 +47,7 @@ function mb(bytes: number): string {
 // and resumes on its own when a window resets.
 function usageResetLabel(iso: string | null): string {
   if (!iso) return "—";
-  const d = new Date(iso);
-  return `איפוס ${d.toLocaleTimeString("he-IL", { hour: "2-digit", minute: "2-digit" })}`;
+  return `איפוס ${formatTime(iso)}`;
 }
 
 function UsageMeter({ label, w }: { label: string; w?: UsageWindow | null }) {
@@ -195,8 +195,9 @@ function nextSaturday18(): Date {
 }
 const HE_DAYS = ["א׳", "ב׳", "ג׳", "ד׳", "ה׳", "ו׳", "ש׳"];
 function fmtDeadline(iso: string): string {
-  const d = new Date(iso);
-  return `${HE_DAYS[d.getDay()]} ${pad2(d.getDate())}/${pad2(d.getMonth() + 1)} ${pad2(d.getHours())}:${pad2(d.getMinutes())}`;
+  const p = israelParts(iso);
+  if (!p) return "—";
+  return `${HE_DAYS[p.weekday]} ${pad2(p.day)}/${pad2(p.month)} ${pad2(p.hour)}:${pad2(p.minute)}`;
 }
 
 function BurstControl({ s }: { s: OpsService }) {