feat(shift): two-pane shift history — list + per-shift activity log, timeframe presets

Rework the shift screen into a master/detail view on /shift: the shift CONTROL
(open/close, drawer vouchers, X-report) on top, then a two-pane history below —
shift list on the LEFT, the selected shift's signed activity log on the RIGHT.

- Timeframe presets replace the bare from/to inputs: Yesterday / Last week /
  Last month / All / Custom (custom reveals the date pickers). Filters the shift
  list by start time.
- Activity log = every ledger event in the selected shift's [start, end] window
  (entries, exits, payments, vouchers, anomalies, the Z-report), rendered like the
  booth live feed (same EVENT_STYLE), with the shift's drawer reconciliation in the
  pane header.
- Scope unchanged + enforced SERVER-SIDE: an operator sees only their own shifts
  (no operator filter); an admin (shift:cash) sees all + the operator filter. The
  list auto-selects the newest shift.

API: /api/events gains an optional `until` (ISO) upper bound so a shift's window
can be fetched ([start,end]); fetchEvents passes it. Verified on live data: a
closed shift window returns just its 20 events out of 260.

Build+lint 12/12 (i18n parity). The same component also backs /setup/shifts.

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

apps/web/src/api.ts

@@ -862,9 +862,11 @@ export type { AppLogRecord };
 export function fetchEvents(
   limit = 100,
   since?: string,
+  until?: string,
 ): Promise<{ events: import("@parking/shared").LedgerEvent[] }> {
   const qs = new URLSearchParams({ limit: String(limit) });
   if (since) qs.set("since", since);
+  if (until) qs.set("until", until);
   return apiFetch(`/api/events?${qs.toString()}`);
 }