fix: hide internal cron prompts from webui

nanobot/webui/transcript.py

@@ -17,6 +17,7 @@ from urllib.parse import unquote, urlparse
 from loguru import logger
 
 from nanobot.config.paths import get_webui_dir
+from nanobot.cron.session_turns import CRON_HISTORY_META
 from nanobot.session.manager import SessionManager
 from nanobot.webui.metadata import WEBUI_MESSAGE_SOURCE_METADATA_KEY, WEBUI_TURN_METADATA_KEY
 
@@ -854,6 +855,8 @@ def _session_user_event(
 ) -> dict[str, Any] | None:
     if message.get("role") != "user":
         return None
+    if message.get(CRON_HISTORY_META) is True:
+        return None
     content = message.get("content")
     text = content if isinstance(content, str) else ""
     media = message.get("media")