test(webui): cover turn-end streaming regressions

tests/agent/test_loop_progress.py

@@ -149,6 +149,7 @@ class TestToolEventProgress:
         provider.chat_with_retry = AsyncMock()
         loop = AgentLoop(bus=bus, provider=provider, workspace=tmp_path, model="openai-codex/gpt-5.5")
         loop.tools.get_definitions = MagicMock(return_value=[])
+        loop.consolidator.maybe_consolidate_by_tokens = AsyncMock(return_value=False)  # type: ignore[method-assign]
 
         await loop._dispatch(InboundMessage(
             channel="websocket",
@@ -165,7 +166,8 @@ class TestToolEventProgress:
         final = [m for m in outbound if not m.metadata.get("_progress")]
 
         assert [m.content for m in progress] == ["Hel", "lo"]
-        assert final[-1].content == "Hello"
+        assert final[-2].content == "Hello"
+        assert (final[-1].metadata or {}).get("_turn_end") is True
         provider.chat_with_retry.assert_not_awaited()
 
     @pytest.mark.asyncio
@@ -214,3 +216,30 @@ class TestToolEventProgress:
             'custom_tool("foo.txt")',
         ]
         assert all(item[0] != "I will inspect it." for item in progress)
+
+    @pytest.mark.asyncio
+    async def test_websocket_dispatch_publishes_final_turn_end_marker(self, tmp_path: Path) -> None:
+        bus = MessageBus()
+        provider = MagicMock()
+        provider.get_default_model.return_value = "test-model"
+        provider.chat_with_retry = AsyncMock(return_value=LLMResponse(content="Done", tool_calls=[]))
+        loop = AgentLoop(bus=bus, provider=provider, workspace=tmp_path, model="test-model")
+        loop.tools.get_definitions = MagicMock(return_value=[])
+        loop.consolidator.maybe_consolidate_by_tokens = AsyncMock(return_value=False)  # type: ignore[method-assign]
+
+        await loop._dispatch(InboundMessage(
+            channel="websocket",
+            sender_id="u1",
+            chat_id="chat1",
+            content="say hello",
+        ))
+
+        outbound = []
+        while bus.outbound_size > 0:
+            outbound.append(await bus.consume_outbound())
+
+        assert outbound[-2].content == "Done"
+        assert (outbound[-2].metadata or {}).get("_turn_end") is not True
+        assert outbound[-1].content == ""
+        assert (outbound[-1].metadata or {}).get("_turn_end") is True
+        assert outbound[-1].chat_id == "chat1"