diff --git a/backend/app/sanitize.py b/backend/app/sanitize.py
index c631772..bd86fb3 100644
--- a/backend/app/sanitize.py
+++ b/backend/app/sanitize.py
@@ -29,6 +29,21 @@ def _clean_url(value: Any) -> str | None:
     return stripped
 
 
+def _is_junk_paragraph(node: Any) -> bool:
+    """پاراگراف خالی یا فقط نویسهٔ خنثی (nbsp/فاصله) — داخل نقل‌قول حذف می‌شود."""
+    if not isinstance(node, dict) or node.get("type") != "paragraph":
+        return False
+    content = node.get("content") or []
+    if not content:
+        return True
+    return all(
+        isinstance(item, dict)
+        and item.get("type") == "text"
+        and not str(item.get("text", "")).replace("\xa0", " ").strip()
+        for item in content
+    )
+
+
 def _walk(node: Any) -> Any:
     if isinstance(node, list):
         return [_walk(item) for item in node]
@@ -48,6 +63,9 @@ def _walk(node: Any) -> Any:
             cleaned[key] = attrs
         else:
             cleaned[key] = _walk(value)
+    # داخل نقل‌قول: پاراگراف‌های خالی/نویسهٔ خنثی حذف — وگرنه خط خالی اضافه رندر می‌شود
+    if cleaned.get("type") == "blockquote" and isinstance(cleaned.get("content"), list):
+        cleaned["content"] = [c for c in cleaned["content"] if not _is_junk_paragraph(c)]
     return cleaned