diff --git a/modules/web_api/llm/db/db_chat.py b/modules/web_api/llm/db/db_chat.py
index 8835ab2..9caa95c 100644
--- a/modules/web_api/llm/db/db_chat.py
+++ b/modules/web_api/llm/db/db_chat.py
@@ -7,7 +7,7 @@ from .connection import get_db_connection
 
 def db_save_chat_message(session_id: str, role: str, content: str, is_ephemeral: int = 0) -> None:
     """Сохраняет сообщение в БД (is_ephemeral=1 для временных служебных шагов, 0 для постоянных)."""
-    conn = get_db_connection()
+    conn = get_db_connection(row_factory=True)
     cursor = conn.cursor()
     cursor.execute("""
         INSERT INTO chat_messages (session_id, role, content, is_ephemeral)
@@ -17,20 +17,19 @@ def db_save_chat_message(session_id: str, role: str, content: str, is_ephemeral:
     conn.close()
 
 
-def db_get_chat_history(session_id: str, limit: int = 20) -> List[Dict[str, Any]]:
-    """Получает последние сообщения истории диалога в хронологическом порядке."""
-    conn = get_db_connection()
-    cursor = conn.cursor()
-    cursor.execute("""
-        SELECT role, content 
-        FROM chat_messages 
-        WHERE session_id = ? 
-        ORDER BY id DESC 
-        LIMIT ?
-    """, (session_id, limit))
-    rows = cursor.fetchall()
-    conn.close()
-    return [{"role": r["role"], "content": r["content"]} for r in reversed(rows)]
+def db_get_chat_history(session_id: str, limit: int = 50) -> list:
+    """Возвращает историю сообщений диалога для сессии."""
+    with get_db_connection(row_factory=True) as conn:
+        cursor = conn.cursor()
+        cursor.execute("""
+            SELECT role, content, is_ephemeral, created_at
+            FROM chat_messages
+            WHERE session_id = ?
+            ORDER BY id DESC
+            LIMIT ?
+        """, (session_id, limit))
+        rows = cursor.fetchall()
+        return [{"role": r["role"], "content": r["content"], "is_ephemeral": r["is_ephemeral"]} for r in reversed(rows)]
 
 
 def db_purge_ephemeral_messages(session_id: str) -> int:
@@ -38,7 +37,7 @@ def db_purge_ephemeral_messages(session_id: str) -> int:
     Физически удаляет все временные служебные сообщения выбранной сессии
     после завершения сценария работы с инструментом.
     """
-    conn = get_db_connection()
+    conn = get_db_connection(row_factory=True)
     cursor = conn.cursor()
     cursor.execute("DELETE FROM chat_messages WHERE session_id = ? AND is_ephemeral = 1", (session_id,))
     deleted = cursor.rowcount
@@ -49,7 +48,7 @@ def db_purge_ephemeral_messages(session_id: str) -> int:
 
 def db_clear_chat_history(session_id: str) -> None:
     """Полная очистка всех сообщений сессии."""
-    conn = get_db_connection()
+    conn = get_db_connection(row_factory=True)
     cursor = conn.cursor()
     cursor.execute("DELETE FROM chat_messages WHERE session_id = ?", (session_id,))
     conn.commit()
@@ -57,7 +56,7 @@ def db_clear_chat_history(session_id: str) -> None:
 
 def db_clear_all_chat_context(session_id: str = None, purge_all: bool = False) -> int:
     """Удаляет сообщения чата и стейты сессий."""
-    with get_db_connection() as conn:
+    with get_db_connection(row_factory=True) as conn:
         cursor = conn.cursor()
         if purge_all:
             if session_id: