feat(agent-office): BaseAgent FSM with idle/break behavior

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

agent-office/app/agents/__init__.py

@@ -0,0 +1,17 @@
+from .stock import StockAgent
+from .music import MusicAgent
+
+AGENT_REGISTRY = {}
+
+def init_agents():
+    AGENT_REGISTRY["stock"] = StockAgent()
+    AGENT_REGISTRY["music"] = MusicAgent()
+
+def get_agent(agent_id: str):
+    return AGENT_REGISTRY.get(agent_id)
+
+def get_all_agent_states() -> list:
+    return [
+        {"agent_id": aid, "state": agent.state, "detail": agent.state_detail}
+        for aid, agent in AGENT_REGISTRY.items()
+    ]