fix: record message confirmations in context

backend/services/brains/prompt_brain.py

@@ -43,6 +43,7 @@ from services.message_stage import (
     MessageDisplaySpec,
     MessageStageRunner,
     MessageStageSpec,
+    confirmation_context_message,
 )
 from services.runtime_variables import DynamicVariableError, DynamicVariableStore
 from services.system_tools import state_update_properties, system_tool_kind
@@ -226,8 +227,12 @@ class PromptBrain(BaseBrain):
             self.prepare_greeting_context(speech, runtime.context)
         try:
             if opening_message is not None:
+                message_spec = self._opening_message_stage_spec(
+                    speech,
+                    opening_message,
+                )
                 message_result = await self._message_stages.run(
-                    self._opening_message_stage_spec(speech, opening_message),
+                    message_spec,
                     speak=self._speak_opening,
                     set_input_enabled=runtime.set_input_enabled,
                     input_already_blocked=self._opening_input_blocked,
@@ -241,6 +246,12 @@ class PromptBrain(BaseBrain):
                         message_result.error or "开场消息显示失败"
                     )
                     return
+                context_message = confirmation_context_message(
+                    message_result,
+                    source="prompt-opening",
+                )
+                if context_message is not None:
+                    runtime.context.add_message(context_message)
 
             if opening_actions:
                 result = await self._action_stages.run(