feat: chat stream messages

backend/src/app_mixins/chat.py

@@ -107,7 +107,9 @@ class ChatMixin:
         now = int(datetime.now().timestamp())
 
         if isinstance(content, Stream):
-            initial_content = "..."
+            initial_format = format
+            format = format and "steam-" + format or "stream"
+            initial_content = str(content.id)
         else:
             initial_content = content
 
@@ -169,9 +171,11 @@ class ChatMixin:
             notify_users()
 
             def chunk_fn (chunk):
-                message.content = content.content + "..."
+                pass
             async def end_fn ():
+                message.format = initial_format
                 message.content = content.content
+
                 if db.is_instance(message):
                     await message.save()
                 await notify_agents()
@@ -228,6 +232,7 @@ class ChatMixin:
 
     def notify_message_to_user(self, user_id, message, update=False):
         if user_id in self.user_connections:
+            # TODO: Server's responsibility, and Message.to_json responsibility as well
             user_message = {
                 'action': 'chat-message',
                 'id': message.id,
@@ -235,6 +240,8 @@ class ChatMixin:
                 'time': message.time,
                 'sender': message.sender,
                 'kind': message.kind,
+                'subkind': message.subkind,
+                'format': message.format,
                 'content': message.content,
                 'threadId': message.thread_id,
                 'update': update,