feat(web): one date standard across the UI — "25 Qer 14:30"

Dates were a mix: catalog-formatted "25 Qershor 20:01" where screens used
formatRelativeDateTime, and browser-locale "7/6/2026, 9:34 AM" in ~20
places that called raw toLocaleString/-Date-/-Time-String. Unified:

- common.monthsShort in both catalogs (Jan/Shk/…/Qer/Korr/…/Dhj);
  formatDate ("25 Qer", year only when not current), formatDateTime
  ("25 Qer 14:30", optional seconds), formatClock ("HH:mm", 24h) in
  lib/format.ts. formatRelativeDateTime keeps Sot/Dje and switches its
  older-dates branch to the same short months.
- Every raw toLocale* DATE call swept: shifts X-report line, plan
  effective dates, sub version labels, drawer today feed, snapshot
  tooltips, device footer checkedAt, event-detail timestamp (keeps
  seconds — chain evidence), tariff composer active-since + version
  sidebar. Number toLocaleString (thousand separators) untouched.

The catalogs in this commit also carry the keys for the two follow-up
commits (fee breakdown, composer increment labels).

Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V

apps/web/src/SubscriptionPlansManager.tsx

@@ -14,6 +14,7 @@ import {
   type SubscriptionPlan,
 } from "./api.js";
 import { Modal } from "./ui/Modal.js";
+import { formatDate } from "./lib/format.js";
 import { currencyOptions } from "./lib/currencies.js";
 
 // Admin-only subscription PLAN catalog. Plans are admin-composed, versioned config the
@@ -277,7 +278,7 @@ export function SubscriptionPlansManager() {
                     {(p.pricePerPeriodMinor / 100).toLocaleString()} {p.currency} / {t(PERIOD_KEY[p.period])}
                   </span>
                   <span>{timeframesSummary(p.timeframes, t)}</span>
-                  <span>{t("plans.colEffective")}: {new Date(p.effectiveFrom).toLocaleDateString()}</span>
+                  <span>{t("plans.colEffective")}: {formatDate(p.effectiveFrom, t)}</span>
                 </div>
 
                 {/* Used by */}