feat(settings): manage resource schedules beside the doctors'

A resource carries its own working hours and holidays in the resource-first
model, so it belongs on the same settings page as a doctor's schedule rather
than on a page of its own. The page now has a scope switch — doctors or
resources — with the per-item tab bar below it, and both scopes reuse the
panels that already existed: ScheduleSection for a doctor, the working-hours
and exceptions panels for a resource. The selection lives in the query
string, so back and refresh return to the same tab.

The screenshot of the finished tab caught two real defects, both fixed here:

Dates in the resource panels and the holidays page read as year 57932.
formatDate already multiplies seconds by 1000, and five call sites passed
`x * 1000` on top of it. This predates the tab — the code was inherited from
the old calendar page — but it was invisible until a two-week preview was put
on screen.

The working-hours panel still told the user their hours were intersected with
the branch's. Branches are gone; the shift is the only source now.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

assets/admin/components/resources/ResourceExceptionsPanel.tsx

@@ -74,7 +74,7 @@ export default function ResourceExceptionsPanel({ resourceUuid, canUpdate }: {
               style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between', gap: 8, fontSize: 13 }}
             >
               <span style={{ color: 'var(--text-2)' }}>
-                {DAY_LABELS[day.day_of_week]} · {formatDate(day.date * 1000)}
+                {DAY_LABELS[day.day_of_week]} · {formatDate(day.date)}
               </span>
               {day.intervals.length === 0 ? (
                 <span style={{ fontSize: 12, color: 'var(--text-3)' }}>
@@ -139,7 +139,7 @@ function ExceptionsCard({
             <div key={e.uuid} style={{ display: 'flex', alignItems: 'center', gap: 8, fontSize: 13 }}>
               <span className="badge amber" style={{ fontSize: 11 }}>{e.type_label}</span>
               <span style={{ flex: 1, color: 'var(--text-2)' }}>
-                {formatDate(e.starts_at * 1000)} تا {formatDate(e.ends_at * 1000)}
+                {formatDate(e.starts_at)} تا {formatDate(e.ends_at)}
                 {e.reason ? ` · ${e.reason}` : ''}
               </span>
               {canUpdate && (