fix max-bot, add tests

adapter/max/handlers/attachments.py

@@ -9,7 +9,7 @@ class AttachmentHandler:
     def handle_list(self, max_chat_id: str) -> str:
         attachments = self.store.get_attachments(max_chat_id)
         if not attachments:
-            return "Attachment queue is empty."
+            return "Очередь вложений пуста."
         lines = [f"  {i+1}. {name}" for i, (_, name) in enumerate(attachments)]
         return "\n".join(lines)
 
@@ -17,13 +17,13 @@ class AttachmentHandler:
         attachments = self.store.staged_attachments.get(max_chat_id, [])
         if index.lower() == "all":
             self.store.staged_attachments[max_chat_id] = []
-            return "All attachments removed from queue."
+            return "Все вложения удалены из очереди."
 
         try:
             idx = int(index) - 1
             if 0 <= idx < len(attachments):
                 removed = attachments.pop(idx)
-                return f"Removed: {removed[1]}"
-            return "Invalid index."
+                return f"Удалено: {removed[1]}"
+            return "Неверный номер."
         except ValueError:
-            return "Usage: !remove <number> or !remove all"
+            return "Использование: /remove <номер> или /remove all"