fix: enforce message snapshot invariants

packages/session-query/session-query/src/index.ts

@@ -5,7 +5,7 @@
  */
 
 import { Context, Service } from 'cordis'
-import { Session, type SessionId } from '@deepseek-ai/dsh-session'
+import { Session, snapshotSessionEvent, type SessionId } from '@deepseek-ai/dsh-session'
 import { foldSessionTitle } from '@deepseek-ai/dsh-session-title'
 import type { SessionTitleSnapshot } from '@deepseek-ai/dsh-session-title'
 import type {
@@ -45,7 +45,6 @@ import {
   materializeSessionResultFilters,
 } from './filters.ts'
 import * as tracing from './tracing.ts'
-import { snapshotEvent } from './snapshot.ts'
 
 export type * from './types.ts'
 export { SessionSearchCursor } from './cursor.ts'
@@ -147,7 +146,7 @@ export abstract class SessionQueryService extends Service {
     new Session(sessionId, loaded.events, loaded.header)
     return {
       session: structuredClone(loaded.header),
-      events: loaded.events.map(snapshotEvent),
+      events: loaded.events.map(snapshotSessionEvent),
     }
   }
 
@@ -331,9 +330,11 @@ export abstract class SessionQueryService extends Service {
     }
     const startSeq = Math.max(0, seq - before)
     const endSeq = Math.min(loaded.events.length - 1, seq + after)
-    const targetSnapshot = snapshotEvent(target)
+    const targetSnapshot = snapshotSessionEvent(target)
     const events = loaded.events.slice(startSeq, endSeq + 1)
-      .map(event => event === target ? targetSnapshot : snapshotEvent(event))
+      .map(event => event === target
+        ? targetSnapshot
+        : snapshotSessionEvent(event))
     return {
       session: structuredClone(loaded.header),
       target: targetSnapshot,