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/holidays/NationalHolidaysCard.tsx

@@ -26,7 +26,7 @@ export default function NationalHolidaysCard({ canUpdate, year = currentJalaliYe
 
   return (
     <div className="card" style={{ padding: 14 }}>
-      <h2 className="section-title" style={{ margin: '0 0 4px' }}>تعطیلات رسمی {year}</h2>
+      <h2 className="section-title" style={{ margin: '0 0 4px' }}>تعطیلات رسمی {year.toLocaleString('fa-IR', { useGrouping: false })}</h2>
       <p style={{ fontSize: 12, color: 'var(--text-3)', margin: '0 0 10px', lineHeight: 1.9 }}>
         این‌ها برای همهٔ پزشکان و منابع اعمال می‌شوند. اگر این محیط روزی را باز است،
         همین‌جا استثنا بزنید — مدیریت کاملشان در{' '}
@@ -37,7 +37,7 @@ export default function NationalHolidaysCard({ canUpdate, year = currentJalaliYe
         <span style={{ fontSize: 13, color: 'var(--text-3)' }}>در حال بارگذاری...</span>
       ) : holidays.length === 0 ? (
         <p style={{ fontSize: 13, color: 'var(--text-3)', margin: 0 }}>
-          برای سال {year} تعطیلی رسمی ثبت نشده است.
+          برای سال {year.toLocaleString('fa-IR', { useGrouping: false })} تعطیلی رسمی ثبت نشده است.
         </p>
       ) : (
         <div style={{ display: 'grid', gap: 8 }}>
@@ -51,7 +51,7 @@ export default function NationalHolidaysCard({ canUpdate, year = currentJalaliYe
                   {open ? 'باز' : 'تعطیل'}
                 </span>
                 <span style={{ flex: 1, color: 'var(--text-2)' }}>
-                  {formatDate(h.date * 1000)} · {h.title}
+                  {formatDate(h.date)} · {h.title}
                 </span>
                 {canUpdate && (
                   open ? (