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/approvals/page.tsx

@@ -9,6 +9,7 @@ import {
   type ApprovalCategory,
   type ApprovalSeverity,
 } from "@/lib/api/chair";
+import { formatDateLong } from "@/lib/format-date";
 
 /**
  * מרכז אישורים — דפנה (INV-G10).
@@ -35,18 +36,7 @@ const SEVERITY_RAIL: Record<ApprovalSeverity, string> = {
   ok: "border-s-success",
 };
 
-function formatDate(iso?: string | null): string {
-  if (!iso) return "";
-  try {
-    return new Date(iso).toLocaleDateString("he-IL", {
-      day: "numeric",
-      month: "long",
-      year: "numeric",
-    });
-  } catch {
-    return "";
-  }
-}
+const formatDate = (iso?: string | null) => formatDateLong(iso);
 
 function ApprovalCard({ cat }: { cat: ApprovalCategory }) {
   const cleared = cat.count === 0;

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

@@ -28,19 +28,7 @@ import {
 import { useCases, useRestoreCase, type Case } from "@/lib/api/cases";
 import { subtypeOf } from "@/components/cases/appeal-type-bars";
 import { APPEAL_SUBTYPE_LABELS, type AppealSubtype } from "@/lib/practice-area";
-
-function formatDate(iso?: string | null) {
-  if (!iso) return "—";
-  try {
-    return new Date(iso).toLocaleDateString("he-IL", {
-      day: "2-digit",
-      month: "2-digit",
-      year: "numeric",
-    });
-  } catch {
-    return iso;
-  }
-}
+import { formatDate, getIsraelYear } from "@/lib/format-date";
 
 // type chip styling per mockup 05 (.t-lic / .t-bet / .t-comp)
 const TYPE_CHIP: Record<string, string> = {
@@ -177,8 +165,8 @@ export default function ArchivePage() {
     const set = new Set<string>();
     for (const c of rows) {
       if (!c.archived_at) continue;
-      const y = new Date(c.archived_at).getFullYear();
-      if (!Number.isNaN(y)) set.add(String(y));
+      const y = getIsraelYear(c.archived_at);
+      if (y !== null) set.add(String(y));
     }
     return [...set].sort((a, b) => Number(b) - Number(a));
   }, [rows]);
@@ -209,7 +197,7 @@ export default function ArchivePage() {
     if (yearFilter !== "all") {
       all = all.filter((r) => {
         const iso = r.original.archived_at;
-        return iso != null && String(new Date(iso).getFullYear()) === yearFilter;
+        return iso != null && String(getIsraelYear(iso)) === yearFilter;
       });
     }
     return all;

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

@@ -16,6 +16,7 @@ import {
   type ChairFeedback,
   type FeedbackCategory,
 } from "@/lib/api/feedback";
+import { formatDateLong } from "@/lib/format-date";
 
 /**
  * מרכז הערות יו"ר — הדף המרכזי לטיפול בכל הערות דפנה שנרשמו על טיוטות
@@ -33,18 +34,7 @@ const CAT_CHIP: Record<FeedbackCategory, string> = {
   other: "bg-rule-soft text-ink-soft",
 };
 
-function formatDate(iso?: string | null): string {
-  if (!iso) return "";
-  try {
-    return new Date(iso).toLocaleDateString("he-IL", {
-      day: "numeric",
-      month: "long",
-      year: "numeric",
-    });
-  } catch {
-    return "";
-  }
-}
+const formatDate = (iso?: string | null) => formatDateLong(iso);
 
 function FeedbackCard({ fb }: { fb: ChairFeedback }) {
   const resolve = useResolveFeedback();

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 }) {

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

@@ -26,6 +26,7 @@ import {
   useRunScript,
   type ScriptRunResult,
 } from "@/lib/api/scripts";
+import { formatDateLong } from "@/lib/format-date";
 
 /*
  * /scripts — catalog of everything under scripts/, rendered as the
@@ -354,11 +355,7 @@ export default function ScriptsPage() {
 
   const lastModified =
     data?.last_modified != null
-      ? new Date(data.last_modified * 1000).toLocaleDateString("he-IL", {
-          year: "numeric",
-          month: "long",
-          day: "numeric",
-        })
+      ? formatDateLong(data.last_modified * 1000)
       : null;
 
   const giteaBase = data?.gitea_url ?? null;

web-ui/src/app/settings/_components/agents-tab.tsx

@@ -19,6 +19,7 @@ import {
   type DriftEntry,
   type PaperclipAgent,
 } from "@/lib/api/paperclip-agents";
+import { formatDateShort } from "@/lib/format-date";
 
 const ROLE_LABEL: Record<string, string> = {
   ceo: "CEO",
@@ -211,7 +212,7 @@ function PairCard({ pair }: { pair: AgentPair }) {
           </Button>
           {pair.master?.updated_at && (
             <span className="text-[0.7rem] text-ink-light">
-              עודכן: {new Date(pair.master.updated_at).toLocaleDateString("he-IL")}
+              עודכן: {formatDateShort(pair.master.updated_at)}
             </span>
           )}
         </div>

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

@@ -13,6 +13,7 @@ import {
   TableRow,
 } from "@/components/ui/table";
 import { useSkills, type Skill } from "@/lib/api/skills";
+import { formatIsoDate } from "@/lib/format-date";
 
 function formatChars(skill: Skill): string {
   // Mockup column = "גודל (תווים)" — the DB markdown char count, grouped.
@@ -21,13 +22,8 @@ function formatChars(skill: Skill): string {
 }
 
 function formatUpdated(iso: string | null): string {
-  if (!iso) return "—";
-  try {
-    // ISO-style date to match the mockup (2026-06-09), tabular.
-    return new Date(iso).toISOString().slice(0, 10);
-  } catch {
-    return "—";
-  }
+  // ISO-style date to match the mockup (2026-06-09), tabular — Israel-time day.
+  return formatIsoDate(iso);
 }
 
 /**