重构: AI聊天可靠性批次(审批累计计数/write_file diff预览/会话隔离补清/token缓存)

src/composables/ai/useAiEvents.ts

@@ -235,6 +235,8 @@ export function handleEvent(event: AiChatEvent) {
       if (tc) {
         tc.status = 'pending_approval'
         tc.reason = event.reason
+        // AE-2025-03: write_file 审批注入行级 diff（旧文件 vs 新内容），前端审批卡预览
+        if (event.diff) tc.diff = event.diff
       }
       // B-260616-12: 进入审批等待→取消该工具慢执行计时器(审批耗时由用户主导,非执行慢)
       clearToolSlowTimer(event.id)