feat: trigger prompt reply after opening confirmation

backend/tests/test_brains.py

@@ -353,7 +353,7 @@ class PromptBrainTests(unittest.IsolatedAsyncioTestCase):
             ["preflight_1", "preflight_2"],
         )
 
-    async def test_opening_stage_starts_speech_and_releases_on_confirmation(self):
+    async def test_opening_stage_triggers_reply_after_confirmation(self):
         tool = RuntimeTool(
             id="opening_data",
             name="加载开场数据",
@@ -454,6 +454,10 @@ class PromptBrainTests(unittest.IsolatedAsyncioTestCase):
         await opening_task
         self.assertEqual(input_states, [False, True])
         self.assertEqual(called_tool_ids, ["opening_data"])
+        self.assertEqual(
+            sum(isinstance(frame, LLMRunFrame) for frame in queued),
+            1,
+        )
         self.assertEqual(
             len(
                 [
@@ -469,6 +473,10 @@ class PromptBrainTests(unittest.IsolatedAsyncioTestCase):
         # Replayed client-ready must not execute startup actions twice.
         await brain.on_client_ready()
         self.assertEqual(brain._actions.execute.await_count, 1)
+        self.assertEqual(
+            sum(isinstance(frame, LLMRunFrame) for frame in queued),
+            1,
+        )
 
     async def test_required_opening_failure_keeps_input_blocked_and_ends_call(self):
         cfg = AssistantConfig(