新增: 跨会话召回四层架构与脉络卡

- 会话终态提炼: 删除前+停靠双挂点,快照与清水位同临界区
- 目标快照: 恢复引导按最终有效意图生成,旧目标不复活
- 知识检索项目维度软排序,WorkingContext 持久化迁移
- 脉络卡: published 知识按项目聚合纯读侧,带入上下文经输入框显式注入
- 压缩与缓存能力在主循环/子代理/提示词三面接线
- 两份专项设计文档与看板销账

src/i18n/en/aiChat.ts

@@ -363,5 +363,10 @@ export default {
     outboxActionFail: 'Action failed, please retry',
     outboxDuePast: 'Scheduled time must be in the future',
     outboxNeedConv: 'No target conversation; create one first',
+    contextBriefsToggle: 'Expand or collapse project briefs',
+    contextBriefsTitle: 'Project briefs',
+    contextBriefsLoading: 'Loading…',
+    contextBriefsEmpty: 'No published knowledge yet',
+    contextBriefsBringIn: 'Bring into context',
   },
 }