feat(tui): add agent interaction workflows

nanobot/agent/turn_delivery.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 import dataclasses
 import time
-from collections.abc import Awaitable, Callable
+from collections.abc import Awaitable, Callable, Mapping
 from dataclasses import dataclass, field
 from typing import TYPE_CHECKING, Any, cast
 
@@ -203,6 +203,9 @@ class TurnDelivery:
     def record_latency(self, latency_ms: int | None) -> None:
         self.runtime_event_publisher.record_turn_latency(self.session_key, latency_ms)
 
+    def record_usage(self, usage: Mapping[str, int]) -> None:
+        self.runtime_event_publisher.record_turn_usage(self.session_key, usage)
+
     def background_response(
         self,
         content: str | None,