bugfix(on werid sequence of chat histories)

query.py

@@ -256,11 +256,20 @@ def add_history(state, request, type, message, name:str = None):
 def load_history(state, history_id):
     state["history"] = History.load(history_id)
 
-    history = [m.content for m in state["history"].messages()]
-    history = itertools.batched(history, 2)
-    history = [m for m in history]
+    history = []
+    for msg in state["history"].messages():
+        if   type(msg) is HumanMessage:
+            history.append([msg.content, ''])
+        elif type(msg) is AIMessage:
+            if not history:
+                history.append(['',''])
+            last = history[-1]
+            if last[1]:
+                history.append(['', msg.content])
+            else:
+                last[1] = msg.content
     
-    if len(history) and len(history[-1]) == 1:
+    if history and len(history[-1]) == 1:
         user_input = history[-1][0]
         history = history[:-1]
     else: