refactor: unify agent session persistence

src/routes/chatSession.ts

@@ -1,5 +1,5 @@
 import { logger } from "../logger.js";
-import { type SessionTurnRecord } from "../history/store.js";
+import { type SessionTurnRecord } from "../sessions/transcriptStore.js";
 import { MemoryStore } from "../memory/store.js";
 import { type OpencodeRuntimeAdapter } from "../runtime/opencode.js";