优化: 脉络卡归属置顶与源会话跳转

- 当前会话归属项目组置顶,focused 标记高亮
- source_ref 解析出可跳转会话 id,消息级引用反查补全
- 条目相对时间/空态引导/标题点击跳源,失败静默

src/api/ai.ts

@@ -421,9 +421,10 @@ export const aiApi = {
 
   /**
    * 脉络卡:published 知识按 source_project 聚合(每项目取复用最高 perProject 条)。
+   * focusConv 标记来源为当前会话的分组(focused=true 供前端高亮);后端未合版本会忽略该参数。
    * 纯读侧;用户点「带入上下文」才经正常发送路径显式注入,不触碰 L3 工具召回铁律。
    */
-  listContextBriefs(perProject?: number): Promise<{ source_project: string; briefs: { title: string; summary: string; source_ref: string | null; source_project: string | null; reuse_count: number }[] }[]> {
-    return invoke('ai_context_briefs', { perProject: perProject ?? null })
+  listContextBriefs(perProject?: number, focusConv?: string): Promise<{ source_project: string; focused?: boolean; briefs: { title: string; summary: string; source_ref: string | null; source_conv: string | null; source_project: string | null; reuse_count: number; updated_at: string }[] }[]> {
+    return invoke('ai_context_briefs', { perProject: perProject ?? null, focusConv: focusConv ?? null })
   },
  }