perf：优化麦麦观察体验，优化推理检索体验

src/maisaka/monitor_events.py

@@ -367,6 +367,47 @@ async def emit_session_start(
     })
 
 
+async def emit_stage_status(
+    *,
+    session_id: str,
+    session_name: str,
+    stage: str,
+    detail: str = "",
+    round_text: str = "",
+    agent_state: str = "",
+    stage_started_at: float,
+    updated_at: float,
+    timestamp: float,
+) -> None:
+    """广播单个聊天流的当前阶段状态。"""
+
+    await _broadcast("stage.status", {
+        "session_id": session_id,
+        "session_name": session_name,
+        "stage": stage,
+        "detail": detail,
+        "round_text": round_text,
+        "agent_state": agent_state,
+        "stage_started_at": stage_started_at,
+        "updated_at": updated_at,
+        "timestamp": timestamp,
+    })
+
+
+async def emit_stage_removed(
+    *,
+    session_id: str,
+    session_name: str = "",
+) -> None:
+    """广播聊天流阶段状态移除事件。"""
+
+    await _broadcast("stage.removed", {
+        "session_id": session_id,
+        "session_name": session_name,
+        "timestamp": time.time(),
+    })
+
+
 async def emit_message_ingested(
     session_id: str,
     speaker_name: str,
@@ -385,6 +426,26 @@ async def emit_message_ingested(
     })
 
 
+async def emit_message_sent(
+    session_id: str,
+    speaker_name: str,
+    content: str,
+    message_id: str,
+    timestamp: float,
+    source_kind: str = "",
+) -> None:
+    """广播 MaiSaka 自己发送的消息事件。"""
+
+    await _broadcast("message.sent", {
+        "session_id": session_id,
+        "speaker_name": speaker_name,
+        "content": content,
+        "message_id": message_id,
+        "source_kind": source_kind,
+        "timestamp": timestamp,
+    })
+
+
 async def emit_cycle_start(
     session_id: str,
     cycle_id: int,
@@ -404,6 +465,23 @@ async def emit_cycle_start(
     })
 
 
+async def emit_cycle_end(
+    session_id: str,
+    cycle_id: int,
+    time_records: Dict[str, float],
+    agent_state: str,
+) -> None:
+    """广播单个推理循环结束事件。"""
+
+    await _broadcast("cycle.end", {
+        "session_id": session_id,
+        "cycle_id": cycle_id,
+        "time_records": _normalize_payload_value(time_records),
+        "agent_state": agent_state,
+        "timestamp": time.time(),
+    })
+
+
 async def emit_timing_gate_result(
     session_id: str,
     cycle_id: int,