fix: improve bool param validation and preserve None tools

- Fix bool type checking in CommandFilter.validate_and_convert_params
  (was using isinstance(bool_instance, bool) instead of 'bool is bool')
- Preserve tools=None when persona explicitly has no tools
- Add missing provider_wake_prefix in test setup

tests/unit/test_internal_agent_sub_stage.py

@@ -28,6 +28,8 @@ async def test_internal_stage_uses_effective_runner_streaming_flag():
     stage = InternalAgentSubStage()
     stage.ctx = MagicMock()
     stage.ctx.plugin_manager.context = MagicMock()
+    stage.ctx.astrbot_config = {"provider_settings": {"wake_prefix": "!"}}
+    stage.provider_wake_prefix = "!"
     stage.streaming_response = True
     stage.unsupported_streaming_strategy = "realtime_segmenting"
     stage.max_step = 5