fix(admin): resolve Tiptap editor bugs, dynamic RTL/LTR layout, sticky TOC, and equalize Bidi typography

frontend/src/admin/EntityDrawer.tsx

@@ -5,6 +5,7 @@ import Swal from 'sweetalert2'
 import { useSiteData } from '../api'
 import { useAdmin, useFieldSaver } from './AdminContext'
 import { adminApi } from './adminClient'
+import { toArticleBodyDoc } from '../utils/tiptapDoc'
 import type { EntityConfig, FieldConfig } from './entities'
 import { ImageField } from '../components/admin/ImageField'
 import { JalaliDatePicker } from '../components/admin/JalaliDatePicker'
@@ -413,10 +414,9 @@ function WysiwygField({
   onSave: (value: unknown) => Promise<boolean>
   registerFlush?: (fn: () => void) => void
 }) {
-  const [doc, setDoc] = useState<Record<string, unknown>>(() =>
-    value && typeof value === 'object' && !Array.isArray(value)
-      ? (value as Record<string, unknown>)
-      : { type: 'doc', content: [{ type: 'paragraph' }] },
+  const [doc, setDoc] = useState<Record<string, unknown>>(
+    // بدنه ذخیره‌شده (سند جدید، رشته JSON یا پاراگراف‌های قدیمی) به سند قابل ویرایش تبدیل می‌شود
+    () => toArticleBodyDoc(value),
   )
   const timer = useRef<ReturnType<typeof setTimeout> | null>(null)
   const pending = useRef<Record<string, unknown> | null>(null)