fix: only update most_recent if we have a value

x_notes/meta.py

@@ -31,10 +31,13 @@ def update_meta(update: dict[str, Any]) -> None:
 def update_meta_from_notes(notes: dict[str, dict[str, Any]]) -> None:
     update = {
         "scraped_at": datetime.now(timezone.utc).isoformat(),
-        "most_recent": list(notes.values())[0]["created_at"] if notes else None,
         "total_tweets": len({note["tweet_id"] for note in notes.values()}),
         "total_fetched": len(
             {note["tweet_id"] for note in notes.values() if "dl" in note}
         ),
     }
+
+    if update["total_tweets"]:
+        update["most_recent"] = list(notes.values())[0]["created_at"]
+
     update_meta(update)