feat: refine topic insights and learner experience

ai_knowledge_base_v2/apps/admin-web/src/components/SystemConfigView.vue

@@ -61,14 +61,18 @@ const groupBlueprints: Record<string, SettingGroupBlueprint[]> = {
   "AI 问答": [
     {
       title: "回答体验",
-      description: "控制会话记忆、引用展示和模型请求的基本行为。",
+      description: "控制引用展示和模型请求的基本行为。",
       keys: [
         "ai_timeout_seconds",
         "mock_model_enabled",
-        "chat_context_message_count",
         "show_reference_sources",
       ],
     },
+    {
+      title: "主题与记忆",
+      description: "控制会话记忆，以及成功问答达到多少轮后开始自动提炼主题内容。",
+      keys: ["chat_context_message_count", "topic_auto_settle_successful_rounds"],
+    },
     {
       title: "模型分流",
       description: "决定正式问答在不同问题类型下如何选择模型。",