diff --git a/backend/app/sanitize.py b/backend/app/sanitize.py
index bd86fb3..a479cfb 100644
--- a/backend/app/sanitize.py
+++ b/backend/app/sanitize.py
@@ -44,6 +44,64 @@ def _is_junk_paragraph(node: Any) -> bool:
     )
 
 
+def _lift_lists_flat(node: Any) -> list[Any]:
+    """گره را به دنباله‌ای از گره‌های نرمال تبدیل می‌کند — نقل‌قول‌های داخل
+    آیتم فهرست به سطح خود فهرست می‌آیند تا خط مسی همهٔ نقل‌قول‌ها یک‌خط شود."""
+    if not isinstance(node, dict):
+        return [node]
+    flat_content: list[Any] = []
+    for child in node.get("content") or []:
+        flat_content.extend(_lift_lists_flat(child))
+    node["content"] = flat_content
+
+    if node.get("type") not in ("bulletList", "orderedList"):
+        return [node]
+
+    rebuilt: list[Any] = []
+    pending_items: list[Any] = []
+    for li in node.get("content") or []:
+        if not isinstance(li, dict) or li.get("type") != "listItem":
+            pending_items.append(li)
+            continue
+        parts: list[list[Any]] = [[]]
+        for child in li.get("content") or []:
+            if isinstance(child, dict) and child.get("type") == "blockquote":
+                parts.append(child)
+                parts.append([])
+            else:
+                parts[-1].append(child)
+        if len(parts) == 1:
+            pending_items.append(li)
+            continue
+        if parts[0]:
+            li["content"] = parts[0]
+            pending_items.append(li)
+        for part in parts[1:]:
+            if isinstance(part, dict) and part.get("type") == "blockquote":
+                if pending_items:
+                    rebuilt.append({**node, "content": pending_items})
+                    pending_items = []
+                rebuilt.append(part)
+            else:
+                pending_items.extend(part)
+    if pending_items:
+        rebuilt.append({**node, "content": pending_items})
+    return rebuilt
+
+
+def _lift_doc(doc: Any) -> Any:
+    lifted = _lift_lists_flat(doc)
+    if len(lifted) == 1 and isinstance(lifted[0], dict) and lifted[0].get("type") == "doc":
+        return lifted[0]
+    content: list[Any] = []
+    for part in lifted:
+        if isinstance(part, dict) and part.get("type") == "doc":
+            content.extend(part.get("content") or [])
+        else:
+            content.append(part)
+    return {"type": "doc", "content": content}
+
+
 def _walk(node: Any) -> Any:
     if isinstance(node, list):
         return [_walk(item) for item in node]
@@ -73,4 +131,5 @@ def sanitize_doc(doc: Any) -> Any:
     """سند TipTap را درجا پاک می‌کند (سایر ساختارها دست‌نخورده برمی‌گردند)."""
     if not isinstance(doc, dict):
         return doc
-    return _walk(doc)
+    walked = _walk(doc)
+    return _lift_doc(walked)