fix: use standard error stub in instruct module

instruct/handlers.py

@@ -16,6 +16,7 @@ from utils.texts import (
     INSTRUCT_TRUECONF_WITH_AD,
     INSTRUCT_TRUECONF_PENDING_TEXT,
     INSTRUCT_EMAIL_TEXT,
+    INSTRUCT_ERROR_MSG,
 )
 from utils.states import get_state, set_state, clear_state
 from utils.stats_logger import log_menu_stats
@@ -332,7 +333,7 @@ async def instruct_router_handler(msg: Message):
                 text = INSTRUCT_TRUECONF_WITH_AD(EMOJI_DIGITS, cn, ticket_id)
                 await msg.answer(text, parse_mode="html")
             else:
-                await msg.answer("❌ Не удалось создать заявку. Попробуйте позже.", parse_mode="html")
+                await msg.answer(INSTRUCT_ERROR_MSG, parse_mode="html")
         else:
             await msg.answer(UNKNOWN_MAIN_CMD_TEXT, parse_mode="html")