feat(resources): one tabbed page per resource

In the resource-first model a resource is the unit of capacity, so its
working hours, holidays, services, skills and categories belong to it — not
scattered across a list page's modals plus a separate calendar page.

/admin/resources/{uuid} now carries six tabs and the active tab lives in the
query string, so back and refresh land on the same view. The old
/calendar URL redirects to ?tab=hours instead of 404ing.

The skills and services modal bodies became panels the tab renders directly;
the modals are now thin wrappers, so the list page keeps working unchanged
and there is still one implementation of each editor.

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

docs/api/resource-calendar.md

@@ -2,6 +2,10 @@
 
 > **Base:** `/api/v1` · **Auth:** JWT · **مجوز:** `appointment_settings`
 > مکمل [resource.md](resource.md) — منبع آنجا ساخته می‌شود، تقویمش اینجا.
+>
+> **پنل:** این اندپوینت‌ها در تب‌های «ساعات کاری» و «تعطیلات و استثنا»ی صفحهٔ
+> `/admin/resources/{uuid}` مصرف می‌شوند. مسیر قدیمی `/admin/resources/{uuid}/calendar`
+> با redirect به `?tab=hours` می‌رود.
 
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