feat(admin): finish the screens that were stopping one step short

Five places where the data existed and the screen did not use it.

Booking a whole course had no button because it needs a doctor and the course
does not carry one — each session can be with a different doctor. The page now
asks for the doctor the same way the resource booking page does, and the button
explains that it is all-or-nothing before it is pressed.

A course whose package does not cover the remaining sessions is still valid —
the rest is simply charged normally — but nobody was told. The course response
carries package_balance and the shortfall, and the page warns. Before session
six, not during it.

The credit ledger already returned who recorded a row and which appointment it
belonged to, and showed neither. An adjustable ledger without the name of the
person who adjusted it is half an audit trail.

Version history printed a JSON blob of each version's effects, which does not
answer the question anyone actually has: what changed? It now diffs each
version against the previous one, field by field, and says so plainly when a
version changed nothing meaningful.

A resource with no calendar showed "—" for utilization. Null means undefined,
not zero, and the next step is always the same: set up the calendar. It is a
link now. The report range also accepts a custom from/to, kept in the URL like
the rest.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

assets/admin/pages/TreatmentCoursePage.tsx

@@ -8,6 +8,8 @@ import { formatDate, formatNumber } from '../lib/utils';
 import { usePermissions } from '../hooks/usePermissions';
 import { useBranches } from '../hooks/useBranches';
 import { useNextSlotSuggestion, useTreatmentCourse } from '../hooks/useCourses';
+import { useQuery } from '@tanstack/react-query';
+import { api, type ApiResponse } from '../lib/api';
 import type { CourseSessionRow } from '../types';
 
 const SESSION_STATUS: Record<CourseSessionRow['status'], { label: string; className: string }> = {
@@ -25,17 +27,27 @@ const SESSION_STATUS: Record<CourseSessionRow['status'], { label: string; classN
  */
 export default function TreatmentCoursePage() {
   const { courseUuid } = useParams<{ courseUuid: string }>();
-  const { course, loading, abandon } = useTreatmentCourse(courseUuid);
+  const { course, loading, abandon, bookAll } = useTreatmentCourse(courseUuid);
   const { branches } = useBranches();
   const { can } = usePermissions();
   const canManage = can('appointment_settings', 'update');
 
   const [branchUuid, setBranchUuid] = useState('');
+  const [doctorUuid, setDoctorUuid] = useState('');
   const [abandoning, setAbandoning] = useState(false);
   const [reason, setReason] = useState('');
 
   const { suggestion } = useNextSlotSuggestion(courseUuid, branchUuid || undefined);
 
+  /** همان اندپوینتی که صفحهٔ رزرو منبع‌محور استفاده می‌کند — منشی فقط پزشکان خودش را می‌بیند. */
+  const doctorsQuery = useQuery<ApiResponse<{ data: { uuid: string; name: string }[] }>>({
+    queryKey: ['booking-doctors'],
+    queryFn: () => api.get('/api/v1/my/clinic-doctors'),
+    staleTime: 60_000,
+  });
+
+  const doctors = doctorsQuery.data?.data?.data ?? [];
+
   /**
    * دوره‌ای که وسطش لغو شده، بی‌صدا کِش می‌آید: جلسه به «برنامه‌ریزی‌شده» برمی‌گردد و
    * هیچ‌کس خبردار نمی‌شود.
@@ -173,6 +185,25 @@ export default function TreatmentCoursePage() {
             )}
           </div>
 
+          {/* پکیجی که کفاف جلسات باقی‌مانده را نمی‌دهد، دوره را باطل نمی‌کند — بقیه‌اش
+              نقدی می‌شود. ولی باید قبل از جلسهٔ ششم دانسته شود، نه سرِ آن. */}
+          {(course.package_shortfall ?? 0) > 0 && (
+            <span
+              style={{
+                fontSize: 13,
+                lineHeight: 1.8,
+                color: 'var(--warning)',
+                background: 'var(--warning-bg)',
+                borderRadius: 'var(--r-sm)',
+                padding: '8px 10px',
+              }}
+            >
+              اعتبار پکیج برای {formatNumber(course.package_shortfall ?? 0)} جلسه کم می‌آید
+              (مانده: {formatNumber(course.package_balance ?? 0)}). بقیهٔ جلسات با قیمت
+              عادی حساب می‌شوند.
+            </span>
+          )}
+
           {overdue !== null && (
             <span
               style={{
@@ -204,6 +235,36 @@ export default function TreatmentCoursePage() {
               />
             </div>
 
+            {/* رزرو گروهی پزشک لازم دارد؛ خودِ دوره پزشکی ندارد چون هر جلسه می‌تواند
+                با پزشک دیگری باشد. */}
+            {canManage && course.status === 'active' && (
+              <div className="field-block" style={{ minWidth: 220, margin: 0 }}>
+                <label>پزشک برای رزرو گروهی</label>
+                <SearchableSelect
+                  value={doctorUuid}
+                  onChange={(v) => setDoctorUuid(String(v ?? ''))}
+                  options={doctors.map((d) => ({ value: d.uuid, label: d.name }))}
+                  placeholder="انتخاب پزشک"
+                />
+              </div>
+            )}
+
+            {canManage && course.status === 'active' && (
+              <button
+                type="button"
+                className="btn primary sm"
+                disabled={branchUuid === '' || doctorUuid === '' || bookAll.isPending}
+                title={
+                  branchUuid === '' || doctorUuid === ''
+                    ? 'شعبه و پزشک را انتخاب کنید'
+                    : 'همهٔ جلسات برنامه‌ریزی‌شده یکجا رزرو می‌شوند — همه یا هیچ'
+                }
+                onClick={() => bookAll.mutate({ branch_uuid: branchUuid, doctor_uuid: doctorUuid })}
+              >
+                رزرو همهٔ جلسات
+              </button>
+            )}
+
             {canManage && course.status === 'active' && (
               <button type="button" className="btn secondary sm" onClick={() => setAbandoning(true)}>
                 رهاکردن دوره