fix(webui): reconcile threads after browser resume

tests/command/test_router_dispatchable.py

@@ -6,7 +6,10 @@ from unittest.mock import AsyncMock, MagicMock
 
 import pytest
 
-from nanobot.command.builtin import register_builtin_commands
+from nanobot.command.builtin import (
+    builtin_command_starts_agent_turn,
+    register_builtin_commands,
+)
 from nanobot.command.router import CommandContext, CommandRouter
 
 
@@ -64,6 +67,20 @@ class TestIsDispatchableCommand:
         assert not router.is_dispatchable_command("/foo bar")
 
 
+@pytest.mark.parametrize(
+    ("content", "expected"),
+    [
+        ("/status", False),
+        ("/history 5", False),
+        ("/goal", False),
+        ("/goal migrate the database", True),
+        ("regular prompt", True),
+    ],
+)
+def test_builtin_command_agent_turn_lifecycle(content: str, expected: bool) -> None:
+    assert builtin_command_starts_agent_turn(content) is expected
+
+
 class TestMidTurnCommandDispatchedDirectly:
     """Verify that commands matching is_dispatchable_command() are dispatched
     correctly when session=None (the mid-turn path)."""