Fix empty records bug and return empty string if state is not found

src/backend/langflow/components/utilities/RecordsAsText.py

@@ -25,6 +25,8 @@ class RecordsAsTextComponent(CustomComponent):
         records: list[Record],
         template: str = "Text: {text}\nData: {data}",
     ) -> Text:
+        if not records:
+            return ""
         if isinstance(records, Record):
             records = [records]
 

src/backend/langflow/graph/graph/state_manager.py

@@ -27,7 +27,7 @@ class GraphStateManager:
 
     def get_state(self, key):
         with self.lock:
-            return self.states.get(key, None)
+            return self.states.get(key, "")
 
     def subscribe(self, key, observer: Callable):
         with self.lock: