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>

assets/admin/pages/ResourcesPage.tsx

@@ -194,8 +194,8 @@ export default function ResourcesPage() {
                   <button type="button" className="btn secondary sm" onClick={() => setServicesFor(r)}>
                     سرویس‌ها
                   </button>
-                  <Link className="btn secondary sm" to={`/admin/resources/${r.uuid}/calendar`}>
-                    تقویم
+                  <Link className="btn secondary sm" to={`/admin/resources/${r.uuid}`}>
+                    تنظیمات
                   </Link>
                   {/* مسدودسازی موردی از تقویم جداست: آن الگوی کاری را عوض می‌کند،
                       این یک بازهٔ مشخص را می‌بندد. */}