修改了nanobot，往Hermes agent的风格走，进度1/3

app-instance/backend/beaver/memory/search/__init__.py

@@ -0,0 +1,5 @@
+"""Session transcript search storage."""
+
+from .transcript_store import TranscriptStore
+
+__all__ = ["TranscriptStore"]

app-instance/backend/beaver/memory/search/transcript_store.py

@@ -0,0 +1,46 @@
+"""兼容层：过渡期把旧 transcript store 导向新的 session 子系统。
+
+真正的主实现现在在：
+1. `beaver.engine.session.store`
+2. `beaver.engine.session.search`
+3. `beaver.engine.session.manager`
+
+保留这个文件只是为了避免已经写好的 MCP server / tool 导入立刻断掉。
+"""
+
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Any
+
+from beaver.engine.session.manager import SessionManager
+
+
+class TranscriptStore:
+    """兼容旧接口的薄封装。"""
+
+    def __init__(self, db_path: str | Path) -> None:
+        path = Path(db_path)
+        workspace = path.parent.parent if path.parent.name == "sessions" else path.parent
+        self.manager = SessionManager(workspace=workspace, db_path=path)
+
+    def close(self) -> None:
+        self.manager.close()
+
+    def ensure_session(self, session_id: str, **kwargs: Any) -> str:
+        return self.manager.ensure_session(session_id, **kwargs)
+
+    def append_message(self, session_id: str, **kwargs: Any) -> int:
+        return self.manager.append_message(session_id, **kwargs)
+
+    def get_session(self, session_id: str) -> dict[str, Any] | None:
+        return self.manager.get_session(session_id)
+
+    def list_sessions_rich(self, **kwargs: Any) -> list[dict[str, Any]]:
+        return self.manager.list_sessions_rich(**kwargs)
+
+    def get_messages_as_conversation(self, session_id: str) -> list[dict[str, Any]]:
+        return self.manager.get_messages_as_conversation(session_id)
+
+    def search_messages(self, **kwargs: Any) -> list[dict[str, Any]]:
+        return self.manager.search_messages(**kwargs)