feat(patients): phase B5 — wire service creation into the detail page

Reuse the existing NewSessionPage (service section/item + insurance coverage +
payment flow → POST /patient/{recordUuid}/session) from the new patient detail:
add a patients-scoped route /admin/patients/:recordUuid/session/new and a
"سرویس جدید" action on the services tab. The multi-step visual restyle and the
standalone invoice-issuance screen remain a follow-up (the underlying
session/billing endpoints already exist).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

assets/admin/pages/PatientDetailPage.tsx

@@ -122,8 +122,13 @@ export default function PatientDetailPage() {
           <InfoRow label="توضیحات" value={profile.description} />
         </div>
       ) : tab === 'services' ? (
-        <TabList q={sessionsQ} emptyLabel="سرویسی ثبت نشده است"
-          row={(s) => ({ title: s.section_name || s.name || 'سرویس', meta: s.created_at ? formatDate(s.created_at) : '', badge: s.status })} />
+        <div>
+          <div style={{ marginBottom: 14 }}>
+            <Link to={`/admin/patients/${uuid}/session/new`} className="btn primary"><PlusIcon style={{ width: 16 }} /> سرویس جدید</Link>
+          </div>
+          <TabList q={sessionsQ} emptyLabel="سرویسی ثبت نشده است"
+            row={(s) => ({ title: s.section_name || s.name || 'سرویس', meta: s.created_at ? formatDate(s.created_at) : '', badge: s.status })} />
+        </div>
       ) : tab === 'appointments' ? (
         <TabList q={appointmentsQ} emptyLabel="نوبتی ثبت نشده است"
           row={(a) => ({ title: a.service_name || a.doctor_name || 'نوبت', meta: a.date ? formatDate(a.date) : (a.starts_at ? formatDate(a.starts_at) : ''), badge: a.status_label || a.status })} />