Improve local agent chat and device health detection

apps/device-host-agent/host_agent/app.py

@@ -12,6 +12,7 @@ from device.manager import DeviceManager
 from host_agent.assignment import AssignmentExecutor
 from host_agent.client import HostAgentClient, HostAgentEnrollmentClient
 from host_agent.config import HostAgentConfig, load_host_agent_config
+from host_agent.conversation import ConversationAgent
 from host_agent.dependency_supervisor import DependencySupervisor
 from host_agent.devices import register_local_device
 from host_agent.enrollment import resolve_host_identity
@@ -33,6 +34,8 @@ from host_agent.status import AgentStatusTracker
 from host_agent.web.app import create_console_app
 from host_agent.web.auth import SessionManager
 from host_agent.web.mcp import build_mcp_server
+from runtime.executor import default_tool_registry
+from runtime.planner_config import load_config as load_planner_config
 from storage.artifact_store import ArtifactStore
 from storage.device_config import DeviceConfigStore
 from storage.task_metadata import TaskMetadataStore
@@ -241,6 +244,15 @@ def create_application(
             mcp_busy_tracker=mcp_busy_tracker,
             status_tracker=status_tracker,
         )
+        planner_config = load_planner_config()
+        conversation_agent = (
+            ConversationAgent(
+                config=planner_config,
+                tools=default_tool_registry(manager=resolved_manager),
+            )
+            if resolved_config.ai_planner_transport == "direct"
+            else None
+        )
         console_app = create_console_app(
             config=resolved_config,
             manager=resolved_manager,
@@ -260,6 +272,7 @@ def create_application(
             mcp_server=mcp_server,
             mcp_token_store=mcp_token_store,
             mcp_busy_tracker=mcp_busy_tracker,
+            conversation_agent=conversation_agent,
         )
         console_server = _EmbeddedConsoleServer(
             uvicorn.Config(