feat: unify debug runtime timelines

backend/services/brains/prompt_brain.py

@@ -231,6 +231,22 @@ class PromptBrain(BaseBrain):
                     speech,
                     opening_message,
                 )
+                await self._emit_trace(
+                    "message_started",
+                    phase="opening",
+                    hasSpeech=bool(speech),
+                    showsMessage=True,
+                    completionPolicy=MESSAGE_CONFIRMATION,
+                    requiresConfirmation=True,
+                    messageTitle=message_spec.display.title,
+                    messageContent=message_spec.display.message,
+                    messageActions=[
+                        {
+                            "id": "confirmed",
+                            "label": message_spec.display.confirm_label,
+                        }
+                    ],
+                )
                 message_result = await self._message_stages.run(
                     message_spec,
                     speak=self._speak_opening,
@@ -242,10 +258,20 @@ class PromptBrain(BaseBrain):
                     release_input_on_failure=False,
                 )
                 if not message_result.succeeded:
+                    await self._emit_trace(
+                        "message_failed",
+                        phase="opening",
+                        error=message_result.error or "开场消息显示失败",
+                    )
                     await self._fail_opening(
                         message_result.error or "开场消息显示失败"
                     )
                     return
+                await self._emit_trace(
+                    "message_completed",
+                    phase="opening",
+                    action=message_result.action,
+                )
                 context_message = confirmation_context_message(
                     message_result,
                     source="prompt-opening",