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/PatientPackageLedgerPage.tsx

@@ -1,5 +1,5 @@
 import React, { useState } from 'react';
-import { useParams } from 'react-router-dom';
+import { Link, useParams } from 'react-router-dom';
 import PageHeader from '../components/ui/PageHeader';
 import DataTable, { type Column } from '../components/ui/DataTable';
 import Modal from '../components/ui/Modal';
@@ -66,6 +66,30 @@ export default function PatientPackageLedgerPage() {
         </span>
       ),
     },
+    {
+      // «چه کسی» و «کدام نوبت» از قبل در پاسخ بودند و نمایش داده نمی‌شدند. دفترِ
+      // اصلاح‌پذیر بدون نامِ اصلاح‌کننده، نصف حسابرسی است.
+      key: 'created_by',
+      header: 'ثبت‌کننده',
+      render: (r) => (
+        <span style={{ fontSize: 12, color: 'var(--text-3)' }}>{r.created_by ?? 'سیستم'}</span>
+      ),
+    },
+    {
+      key: 'appointment_uuid',
+      header: 'نوبت',
+      render: (r) =>
+        r.appointment_uuid ? (
+          <Link
+            to={`/admin/appointments/${r.appointment_uuid}`}
+            style={{ fontSize: 12, color: 'var(--primary)' }}
+          >
+            مشاهدهٔ نوبت
+          </Link>
+        ) : (
+          <span style={{ fontSize: 12, color: 'var(--text-3)' }}>—</span>
+        ),
+    },
   ];
 
   return (