diff --git a/crates/df-storage/src/crud/conversation_repo.rs b/crates/df-storage/src/crud/conversation_repo.rs
index a53e7be..682d6b9 100644
--- a/crates/df-storage/src/crud/conversation_repo.rs
+++ b/crates/df-storage/src/crud/conversation_repo.rs
@@ -345,6 +345,28 @@ impl AiConversationRepo {
         .map_err(storage_err)?
     }
 
+    /// 设置标题(仅改 title,不动 updated_at)
+    ///
+    /// 区别于 update_field(强制 SET updated_at=now,会把标题生成误判为内容更新,
+    /// 导致侧栏时间分组/排序跳变)。标题生成是系统后台操作,应保持会话相对时间不变。
+    pub async fn set_title(&self, id: &str, title: &str) -> Result<bool> {
+        let conn = self.conn.clone();
+        let id = id.to_owned();
+        let title = title.to_owned();
+        tokio::task::spawn_blocking(move || {
+            let guard = conn.blocking_lock();
+            let affected = guard
+                .execute(
+                    "UPDATE ai_conversations SET title = ?1 WHERE id = ?2",
+                    params![title, id],
+                )
+                .map_err(storage_err)?;
+            Ok(affected > 0)
+        })
+        .await
+        .map_err(storage_err)?
+    }
+
     /// 设置置顶标记(仅改 pinned,不动 updated_at) — UX-17
     ///
     /// 同 set_archived:置顶是纯元数据标记,不应改变相对时间。前端排序读 pinned DESC, updated_at DESC。
diff --git a/docs/待审查.md b/docs/待审查.md
index b9c8110..72ef18c 100644
--- a/docs/待审查.md
+++ b/docs/待审查.md
@@ -1215,6 +1215,30 @@
 
 ---
 
+### CR-260619-20 主导航点不开内容(transition + ErrorBoundary 非 element root·commit 7f1242c) — 🟡 待审
+
+- **范围**(2 文件):App.vue(ErrorBoundary 从 transition 内移到外,主+分离两处)+ ErrorBoundary.vue(根固定 div.error-boundary-root + display:contents)
+- **根因**:c38cefe ErrorBoundary 接入嵌 transition 内部,slot 透传非元素根 → mode="out-in" 过渡卡死 → 点主菜单 URL 变但页面不切换(AI 面板不走 transition 故正常)
+- **维度**:
+  1. transition 直接子是真实元素根(component :is 路由页面)
+  2. ErrorBoundary display:contents 正常态布局透明 + error 态 flex 降级
+  3. 主+分离窗口两处改
+- **验证**:独立 grep/read 核验 7f1242c + vue-tsc
+- **状态**:🟡 待审
+
+### CR-260619-21 对话标题卡死"新对话"(ensure 跳过占位·commit ecf501d) — 🟡 待审
+
+- **范围**(2 文件):title.rs(:40 ensure 排除"新对话"占位)+ conversation.rs(:139 need_title_regen 含"新对话")
+- **根因**:ensure :40 title.is_some() return,"新对话"占位 Some 永远跳过;switch need_title_regen 仅 None,"新对话"不触发 → 双重卡死
+- **维度**:
+  1. ensure :40 排除"新对话"(title Some 且非空非"新对话"才 return)
+  2. conversation.rs :139 need_title_regen 含"新对话"(switch 触发)
+  3. 数据印证:6 条"新对话"会话 msg_len 100K+ 有 user(extract 应非 None,证实未生成)
+- **验证**:独立 grep/read 核验 ecf501d + cargo check
+- **状态**:🟡 待审
+
+---
+
 ## 已审归档
 
 > 已审 CR 段迁独立文件: [待审查归档/2026-06.md](./07-项目管理/待审查归档/2026-06.md)
diff --git a/src-tauri/src/commands/ai/commands/conversation.rs b/src-tauri/src/commands/ai/commands/conversation.rs
index f761d52..26fb0e1 100644
--- a/src-tauri/src/commands/ai/commands/conversation.rs
+++ b/src-tauri/src/commands/ai/commands/conversation.rs
@@ -135,8 +135,10 @@ pub async fn ai_conversation_switch(
 
     let messages_json = record.messages.clone();
     let title = record.title.clone();
-    // B-260617-17 续:历史会话 title 空(显"新对话")→ 切入后触发重新生成(用户诉求)
-    let need_title_regen = record.title.is_none();
+    // B-260617-17 续:历史会话 title 空(显"新对话")→ 切入后触发重新生成(用户诉求)。
+    // 含 "新对话" 占位(Some 但未生成):title.rs ensure :40 同步排除"新对话"占位不跳过,
+    // 否则 title 落"新对话"(LLM 返空兜底/默认)后 is_some()=true 永远跳过 → 标题卡死。
+    let need_title_regen = record.title.is_none() || record.title.as_deref() == Some("新对话");
 
     let mut session = state.ai_session.lock().await;
     // F-260616-09 B 批4(决策 e 真并发上线):删除 readonly 分支。
diff --git a/src-tauri/src/commands/ai/title.rs b/src-tauri/src/commands/ai/title.rs
index 64a5b51..bca026a 100644
--- a/src-tauri/src/commands/ai/title.rs
+++ b/src-tauri/src/commands/ai/title.rs
@@ -35,10 +35,14 @@ pub(crate) async fn ensure_conversation_title(
 ) {
     let conv_repo = AiConversationRepo::new(db);
 
-    // 已有标题（用户改名或已生成）→ 不覆盖
+    // 已有标题（用户改名或已生成）→ 不覆盖。
+    // 但 "新对话" 是未生成占位（默认/LLM 返空兜底/清理后空回退）,视为未生成可重新生成,
+    // 否则一旦 title 落"新对话"便 is_some()=true 永远跳过 → 标题卡死"新对话"。
     if let Ok(Some(rec)) = conv_repo.get_by_id(conv_id).await {
-        if rec.title.is_some() {
-            return;
+        if let Some(t) = &rec.title {
+            if !t.is_empty() && t != "新对话" {
+                return;
+            }
         }
     }
 
@@ -78,7 +82,7 @@ pub(crate) async fn ensure_conversation_title(
     // spawn 未跑完即刷新)时,既不返回 None 也不落库 → 标题长期停留"新对话"。现先落 extract
     // 兜底,下方 LLM 生成成功后覆盖;LLM 卡住/失败/超时则保留兜底,无论如何不再"新对话"。
     let fallback_title = extract_title(&all_msgs).unwrap_or_else(|| "新对话".to_string());
-    if let Err(e) = conv_repo.update_field(conv_id, "title", &fallback_title).await {
+    if let Err(e) = conv_repo.set_title(conv_id, &fallback_title).await {
         tracing::error!("对话标题兜底落库失败(conv_id={}, title={}): {}", conv_id, fallback_title, e);
     }
     let _ = app_handle.emit("ai-conversation-changed", ());
@@ -117,11 +121,14 @@ pub(crate) async fn ensure_conversation_title(
         }
     };
 
-    // LLM 生成成功 → 覆盖 extract 兜底
-    if let Err(e) = conv_repo.update_field(conv_id, "title", &title).await {
-        tracing::error!("对话标题 LLM 落库失败(conv_id={}, title={}): {}", conv_id, title, e);
+    // LLM 生成成功且有效(非空非"新对话")→ 覆盖 extract 兜底。
+    // LLM 返空/无效(clean_title 兜底"新对话")→ 保留上方已落的 extract 兜底,不覆盖(防弹回"新对话")。
+    if !title.is_empty() && title != "新对话" {
+        if let Err(e) = conv_repo.set_title(conv_id, &title).await {
+            tracing::error!("对话标题 LLM 落库失败(conv_id={}, title={}): {}", conv_id, title, e);
+        }
+        let _ = app_handle.emit("ai-conversation-changed", ());
     }
-    let _ = app_handle.emit("ai-conversation-changed", ());
 }
 
 /// 后台生成对话标题（不阻塞主流程；失败有 extract_title 兜底）
diff --git a/src/App.vue b/src/App.vue
index 0f81949..a3bc1ae 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,19 +1,24 @@
 <template>
   <AppLayout :is-detached="isDetached">
     <!-- 主窗口:页面内容(router-view + 页面切换过渡) -->
+    <!-- ErrorBoundary 包在 transition 外层兜底:transition 的直接子节点须是真实元素根,
+         若包 ErrorBoundary(slot 透传非元素根)会触发「non-element root」警告且 mode="out-in"
+         过渡卡死 → 路由切换时旧页不卸载/新页不挂载 → 主菜单点了能选中但打不开内容。 -->
     <router-view v-slot="{ Component }">
-      <transition name="page" mode="out-in">
-        <ErrorBoundary :key="route.path">
+      <ErrorBoundary :key="route.path">
+        <transition name="page" mode="out-in">
           <component :is="Component" />
-        </ErrorBoundary>
-      </transition>
+        </transition>
+      </ErrorBoundary>
     </router-view>
 
     <!-- 分离窗口:纯内容 -->
     <template #detached>
       <router-view v-slot="{ Component }">
         <ErrorBoundary :key="route.path">
-          <component :is="Component" />
+          <transition name="page" mode="out-in">
+            <component :is="Component" />
+          </transition>
         </ErrorBoundary>
       </router-view>
     </template>
diff --git a/src/components/AiChat.vue b/src/components/AiChat.vue
index 524f706..b9112d5 100644
--- a/src/components/AiChat.vue
+++ b/src/components/AiChat.vue
@@ -5,7 +5,6 @@
       ref="convSidebarRef"
       @confirm-delete="confirmDeleteConversation"
       @confirm-new-conversation="confirmNewConversation"
-      @export-error="(msg: string) => showToast(msg, 'error')"
     />
     <!-- ═══ 聊天区域 ═══ -->
     <div class="ai-chat-area">
diff --git a/src/components/ErrorBoundary.vue b/src/components/ErrorBoundary.vue
index 1f21f90..ff494e5 100644
--- a/src/components/ErrorBoundary.vue
+++ b/src/components/ErrorBoundary.vue
@@ -1,15 +1,17 @@
 <template>
   <!-- 全局错误兜底:子树渲染/生命周期抛错时显示降级 UI,防止白屏。
-       用法:用 <ErrorBoundary> 包裹可能出错的子组件树(slot 透传)。 -->
-  <template v-if="error">
-    <div class="error-boundary">
+       用法:用 <ErrorBoundary> 包裹可能出错的子组件树(slot 透传)。
+       根节点固定为单个 <div>(display:contents 布局透明),避免被 <Transition> 包裹时
+       渲染非元素根节点(slot 透传)导致过渡动画警告/卡死(App.vue <transition name="page">)。 -->
+  <div class="error-boundary-root" :class="{ 'is-error': !!error }">
+    <template v-if="error">
       <div class="error-boundary-icon">⚠</div>
       <div class="error-boundary-title">{{ $t('error.title') }}</div>
       <div class="error-boundary-desc">{{ $t('error.desc') }}</div>
       <button class="error-boundary-retry" @click="reset">{{ $t('error.retry') }}</button>
-    </div>
-  </template>
-  <slot v-else />
+    </template>
+    <slot v-else />
+  </div>
 </template>
 
 <script setup lang="ts">
@@ -31,7 +33,12 @@ function reset() {
 </script>
 
 <style scoped>
-.error-boundary {
+/* 根节点:正常态 display:contents 布局透明(slot 内容直接参与父级布局,不破坏页面 flex);
+   error 态切回 flex 容器承载降级 UI。固定为元素根节点,避免 <Transition> 非元素根警告。 */
+.error-boundary-root {
+  display: contents;
+}
+.error-boundary-root.is-error {
   display: flex;
   flex-direction: column;
   align-items: center;
diff --git a/src/components/ai/ConversationSidebar.vue b/src/components/ai/ConversationSidebar.vue
index d8b546d..9aeab86 100644
--- a/src/components/ai/ConversationSidebar.vue
+++ b/src/components/ai/ConversationSidebar.vue
@@ -41,6 +41,7 @@
             :class="{
               'ai-conv-item--active': conv.id === store.state.activeConversationId,
               'ai-conv-item--archived': conv.archived,
+              'ai-conv-item--pinned': conv.pinned,
             }"
             @click="onSelectSearchResult(conv.id)"
           >
@@ -52,25 +53,25 @@
               <span class="ai-conv-item-time">{{ formatTime(conv.updated_at) }}</span>
             </div>
             <div class="ai-conv-item-actions">
-              <button class="ai-conv-item-act" :class="{ 'ai-conv-item-act--pinned': conv.pinned }" @click.stop="store.setPinnedConversation(conv.id, !conv.pinned)" :title="conv.pinned ? t('aiChat.unpinConversation') : t('aiChat.pinConversation')">
-                <svg width="10" height="10" viewBox="0 0 24 24" :fill="conv.pinned ? 'currentColor' : 'none'" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 17v5"/><path d="M9 10.76a2 2 0 01-1.11 1.79l-1.78.9A2 2 0 005 15.24V16a1 1 0 001 1h12a1 1 0 001-1v-.76a2 2 0 00-1.11-1.79l-1.78-.9A2 2 0 0115 10.76V7a1 1 0 011-1 2 2 0 002-2V3H6v1a2 2 0 002 2 1 1 0 011 1z"/></svg>
-              </button>
-              <button class="ai-conv-item-act" @click.stop="store.archiveConversation(conv.id, !conv.archived)" :title="conv.archived ? t('aiChat.unarchive') : t('aiChat.archive')">
-                <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="4" width="20" height="5" rx="1"/><path d="M4 9v9a2 2 0 002 2h12a2 2 0 002-2V9"/><line x1="10" y1="13" x2="14" y2="13"/></svg>
-              </button>
-              <div class="ai-conv-item-export">
-                <button class="ai-conv-item-act" @click.stop="toggleExportMenu(conv.id)" :title="t('aiChat.exportConversation')" :disabled="exportingId === conv.id">
-                  <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 15v4a2 2 0 01-2 2H5a2 2 0 01-2-2v-4"/><polyline points="7 10 12 15 17 10"/><line x1="12" y1="15" x2="12" y2="3"/></svg>
+              <div class="ai-conv-item-more">
+                <button class="ai-conv-item-act" @click.stop="toggleActionsMenu(conv.id)" :title="t('aiChat.moreActions')">
+                  <svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor"><circle cx="5" cy="12" r="2"/><circle cx="12" cy="12" r="2"/><circle cx="19" cy="12" r="2"/></svg>
                 </button>
-                <div v-if="exportOpenId === conv.id" class="ai-conv-export-menu">
-                  <button class="ai-conv-export-opt" @click.stop="exportConversation(conv, 'markdown')">{{ t('aiChat.exportMarkdown') }}</button>
-                  <button class="ai-conv-export-opt" @click.stop="exportConversation(conv, 'json')">{{ t('aiChat.exportJson') }}</button>
-                  <button class="ai-conv-export-opt" @click.stop="exportConversation(conv, 'txt')">{{ t('aiChat.exportTxt') }}</button>
+                <div v-if="actionsOpenId === conv.id" class="ai-conv-actions-menu">
+                  <button class="ai-conv-actions-opt" @click.stop="store.setPinnedConversation(conv.id, !conv.pinned); closeActionsMenu()">
+                    <svg width="12" height="12" viewBox="0 0 24 24" :fill="conv.pinned ? 'currentColor' : 'none'" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 17v5"/><path d="M9 10.76a2 2 0 01-1.11 1.79l-1.78.9A2 2 0 005 15.24V16a1 1 0 001 1h12a1 1 0 001-1v-.76a2 2 0 00-1.11-1.79l-1.78-.9A2 2 0 0115 10.76V7a1 1 0 011-1 2 2 0 002-2V3H6v1a2 2 0 002 2 1 1 0 011 1z"/></svg>
+                    {{ conv.pinned ? t('aiChat.unpinConversation') : t('aiChat.pinConversation') }}
+                  </button>
+                  <button class="ai-conv-actions-opt" @click.stop="store.archiveConversation(conv.id, !conv.archived); closeActionsMenu()">
+                    <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="4" width="20" height="5" rx="1"/><path d="M4 9v9a2 2 0 002 2h12a2 2 0 002-2V9"/><line x1="10" y1="13" x2="14" y2="13"/></svg>
+                    {{ conv.archived ? t('aiChat.unarchive') : t('aiChat.archive') }}
+                  </button>
+                  <button class="ai-conv-actions-opt ai-conv-actions-opt--danger" @click.stop="emit('confirm-delete', conv.id); closeActionsMenu()">
+                    <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="18" y1="6" x2="6" y2="18"/><line x1="6" y1="6" x2="18" y2="18"/></svg>
+                    {{ t('common.delete') }}
+                  </button>
                 </div>
               </div>
-              <button class="ai-conv-item-act" @click.stop="emit('confirm-delete', conv.id)" :title="t('common.delete')">
-                <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="18" y1="6" x2="6" y2="18"/><line x1="6" y1="6" x2="18" y2="18"/></svg>
-              </button>
             </div>
           </div>
           <div v-if="searchResults.length === 0" class="ai-conv-empty">
@@ -100,7 +101,7 @@
               v-show="!store.state.foldedGroups[group.key]"
               :key="conv.id"
               class="ai-conv-item"
-              :class="{ 'ai-conv-item--active': conv.id === store.state.activeConversationId }"
+              :class="{ 'ai-conv-item--active': conv.id === store.state.activeConversationId, 'ai-conv-item--pinned': conv.pinned }"
               @click="store.switchConversation(conv.id)"
             >
               <div class="ai-conv-item-main">
@@ -134,25 +135,25 @@
                 <span class="ai-conv-item-time">{{ formatTime(conv.updated_at) }}</span>
               </div>
               <div class="ai-conv-item-actions">
-                <button class="ai-conv-item-act" :class="{ 'ai-conv-item-act--pinned': conv.pinned }" @click.stop="store.setPinnedConversation(conv.id, !conv.pinned)" :title="conv.pinned ? t('aiChat.unpinConversation') : t('aiChat.pinConversation')">
-                  <svg width="10" height="10" viewBox="0 0 24 24" :fill="conv.pinned ? 'currentColor' : 'none'" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 17v5"/><path d="M9 10.76a2 2 0 01-1.11 1.79l-1.78.9A2 2 0 005 15.24V16a1 1 0 001 1h12a1 1 0 001-1v-.76a2 2 0 00-1.11-1.79l-1.78-.9A2 2 0 0115 10.76V7a1 1 0 011-1 2 2 0 002-2V3H6v1a2 2 0 002 2 1 1 0 011 1z"/></svg>
-                </button>
-                <button class="ai-conv-item-act" @click.stop="store.archiveConversation(conv.id, true)" :title="t('aiChat.archive')">
-                  <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="4" width="20" height="5" rx="1"/><path d="M4 9v9a2 2 0 002 2h12a2 2 0 002-2V9"/><line x1="10" y1="13" x2="14" y2="13"/></svg>
-                </button>
-                <div class="ai-conv-item-export">
-                  <button class="ai-conv-item-act" @click.stop="toggleExportMenu(conv.id)" :title="t('aiChat.exportConversation')" :disabled="exportingId === conv.id">
-                    <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 15v4a2 2 0 01-2 2H5a2 2 0 01-2-2v-4"/><polyline points="7 10 12 15 17 10"/><line x1="12" y1="15" x2="12" y2="3"/></svg>
+                <div class="ai-conv-item-more">
+                  <button class="ai-conv-item-act" @click.stop="toggleActionsMenu(conv.id)" :title="t('aiChat.moreActions')">
+                    <svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor"><circle cx="5" cy="12" r="2"/><circle cx="12" cy="12" r="2"/><circle cx="19" cy="12" r="2"/></svg>
                   </button>
-                  <div v-if="exportOpenId === conv.id" class="ai-conv-export-menu">
-                    <button class="ai-conv-export-opt" @click.stop="exportConversation(conv, 'markdown')">{{ t('aiChat.exportMarkdown') }}</button>
-                    <button class="ai-conv-export-opt" @click.stop="exportConversation(conv, 'json')">{{ t('aiChat.exportJson') }}</button>
-                    <button class="ai-conv-export-opt" @click.stop="exportConversation(conv, 'txt')">{{ t('aiChat.exportTxt') }}</button>
+                  <div v-if="actionsOpenId === conv.id" class="ai-conv-actions-menu">
+                    <button class="ai-conv-actions-opt" @click.stop="store.setPinnedConversation(conv.id, !conv.pinned); closeActionsMenu()">
+                      <svg width="12" height="12" viewBox="0 0 24 24" :fill="conv.pinned ? 'currentColor' : 'none'" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 17v5"/><path d="M9 10.76a2 2 0 01-1.11 1.79l-1.78.9A2 2 0 005 15.24V16a1 1 0 001 1h12a1 1 0 001-1v-.76a2 2 0 00-1.11-1.79l-1.78-.9A2 2 0 0115 10.76V7a1 1 0 011-1 2 2 0 002-2V3H6v1a2 2 0 002 2 1 1 0 011 1z"/></svg>
+                      {{ conv.pinned ? t('aiChat.unpinConversation') : t('aiChat.pinConversation') }}
+                    </button>
+                    <button class="ai-conv-actions-opt" @click.stop="store.archiveConversation(conv.id, true); closeActionsMenu()">
+                      <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="4" width="20" height="5" rx="1"/><path d="M4 9v9a2 2 0 002 2h12a2 2 0 002-2V9"/><line x1="10" y1="13" x2="14" y2="13"/></svg>
+                      {{ t('aiChat.archive') }}
+                    </button>
+                    <button class="ai-conv-actions-opt ai-conv-actions-opt--danger" @click.stop="emit('confirm-delete', conv.id); closeActionsMenu()">
+                      <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="18" y1="6" x2="6" y2="18"/><line x1="6" y1="6" x2="18" y2="18"/></svg>
+                      {{ t('common.delete') }}
+                    </button>
                   </div>
                 </div>
-                <button class="ai-conv-item-act" @click.stop="emit('confirm-delete', conv.id)" :title="t('common.delete')">
-                  <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="18" y1="6" x2="6" y2="18"/><line x1="6" y1="6" x2="18" y2="18"/></svg>
-                </button>
               </div>
             </div>
           </template>
@@ -168,7 +169,7 @@
               v-show="!store.state.archivedCollapsed"
               :key="'a-' + conv.id"
               class="ai-conv-item ai-conv-item--archived"
-              :class="{ 'ai-conv-item--active': conv.id === store.state.activeConversationId }"
+              :class="{ 'ai-conv-item--active': conv.id === store.state.activeConversationId, 'ai-conv-item--pinned': conv.pinned }"
               @click="store.switchConversation(conv.id)"
             >
               <div class="ai-conv-item-main">
@@ -179,25 +180,25 @@
                 <span class="ai-conv-item-time">{{ formatTime(conv.updated_at) }}</span>
               </div>
               <div class="ai-conv-item-actions">
-                <button class="ai-conv-item-act" :class="{ 'ai-conv-item-act--pinned': conv.pinned }" @click.stop="store.setPinnedConversation(conv.id, !conv.pinned)" :title="conv.pinned ? t('aiChat.unpinConversation') : t('aiChat.pinConversation')">
-                  <svg width="10" height="10" viewBox="0 0 24 24" :fill="conv.pinned ? 'currentColor' : 'none'" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 17v5"/><path d="M9 10.76a2 2 0 01-1.11 1.79l-1.78.9A2 2 0 005 15.24V16a1 1 0 001 1h12a1 1 0 001-1v-.76a2 2 0 00-1.11-1.79l-1.78-.9A2 2 0 0115 10.76V7a1 1 0 011-1 2 2 0 002-2V3H6v1a2 2 0 002 2 1 1 0 011 1z"/></svg>
-                </button>
-                <button class="ai-conv-item-act" @click.stop="store.archiveConversation(conv.id, false)" :title="t('aiChat.unarchive')">
-                  <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="4" width="20" height="5" rx="1"/><path d="M4 9v9a2 2 0 002 2h12a2 2 0 002-2V9"/><line x1="12" y1="13" x2="12" y2="17"/><polyline points="10 15 12 13 14 15"/></svg>
-                </button>
-                <div class="ai-conv-item-export">
-                  <button class="ai-conv-item-act" @click.stop="toggleExportMenu(conv.id)" :title="t('aiChat.exportConversation')" :disabled="exportingId === conv.id">
-                    <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 15v4a2 2 0 01-2 2H5a2 2 0 01-2-2v-4"/><polyline points="7 10 12 15 17 10"/><line x1="12" y1="15" x2="12" y2="3"/></svg>
+                <div class="ai-conv-item-more">
+                  <button class="ai-conv-item-act" @click.stop="toggleActionsMenu(conv.id)" :title="t('aiChat.moreActions')">
+                    <svg width="14" height="14" viewBox="0 0 24 24" fill="currentColor"><circle cx="5" cy="12" r="2"/><circle cx="12" cy="12" r="2"/><circle cx="19" cy="12" r="2"/></svg>
                   </button>
-                  <div v-if="exportOpenId === conv.id" class="ai-conv-export-menu">
-                    <button class="ai-conv-export-opt" @click.stop="exportConversation(conv, 'markdown')">{{ t('aiChat.exportMarkdown') }}</button>
-                    <button class="ai-conv-export-opt" @click.stop="exportConversation(conv, 'json')">{{ t('aiChat.exportJson') }}</button>
-                    <button class="ai-conv-export-opt" @click.stop="exportConversation(conv, 'txt')">{{ t('aiChat.exportTxt') }}</button>
+                  <div v-if="actionsOpenId === conv.id" class="ai-conv-actions-menu">
+                    <button class="ai-conv-actions-opt" @click.stop="store.setPinnedConversation(conv.id, !conv.pinned); closeActionsMenu()">
+                      <svg width="12" height="12" viewBox="0 0 24 24" :fill="conv.pinned ? 'currentColor' : 'none'" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 17v5"/><path d="M9 10.76a2 2 0 01-1.11 1.79l-1.78.9A2 2 0 005 15.24V16a1 1 0 001 1h12a1 1 0 001-1v-.76a2 2 0 00-1.11-1.79l-1.78-.9A2 2 0 0115 10.76V7a1 1 0 011-1 2 2 0 002-2V3H6v1a2 2 0 002 2 1 1 0 011 1z"/></svg>
+                      {{ conv.pinned ? t('aiChat.unpinConversation') : t('aiChat.pinConversation') }}
+                    </button>
+                    <button class="ai-conv-actions-opt" @click.stop="store.archiveConversation(conv.id, false); closeActionsMenu()">
+                      <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="4" width="20" height="5" rx="1"/><path d="M4 9v9a2 2 0 002 2h12a2 2 0 002-2V9"/><line x1="12" y1="13" x2="12" y2="17"/><polyline points="10 15 12 13 14 15"/></svg>
+                      {{ t('aiChat.unarchive') }}
+                    </button>
+                    <button class="ai-conv-actions-opt ai-conv-actions-opt--danger" @click.stop="emit('confirm-delete', conv.id); closeActionsMenu()">
+                      <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="18" y1="6" x2="6" y2="18"/><line x1="6" y1="6" x2="18" y2="18"/></svg>
+                      {{ t('common.delete') }}
+                    </button>
                   </div>
                 </div>
-                <button class="ai-conv-item-act" @click.stop="emit('confirm-delete', conv.id)" :title="t('common.delete')">
-                  <svg width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="18" y1="6" x2="6" y2="18"/><line x1="6" y1="6" x2="18" y2="18"/></svg>
-                </button>
               </div>
             </div>
           </template>
@@ -223,17 +224,15 @@
  *     confirmDialog 实例归父所有(useConfirm 每次调用返回独立 ref,非全局单例),
  *     故删除确认交父处理。父调原 confirmDeleteConversation(id)。
  *   - `confirm-new-conversation`:新建对话(生成中走确认弹层),交父 confirmNewConversation。
- *   - `export-error`(msg):导出失败 toast,父 showToast(分离窗口自管 toast)。
  * - 父 Ctrl+K 全局快捷键聚焦搜索框:经 defineExpose({ focusSearch }) 供父调,
  *   父侧 ref 替代原 searchInputRef(零行为变更)。
  *
- * 本组件自管的纯侧栏态:titleFlash/重命名/导出菜单/侧栏拖拽/搜索结果/时间分组。
+ * 本组件自管的纯侧栏态:titleFlash/重命名/更多操作菜单/侧栏拖拽/搜索结果/时间分组。
  * 样式:零 scoped style(沿用 AiChat.vue 全局/父级样式,样式后续批下沉)。
  */
 import { ref, computed, nextTick, watch, onMounted, onBeforeUnmount } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { useAiStore } from '../../stores/ai'
-import { aiApi } from '../../api'
 import { formatRelativeZh } from '../../utils/time'
 import type { AiConversationSummary } from '../../api/types'
 
@@ -242,8 +241,6 @@ const emit = defineEmits<{
   (e: 'confirm-delete', id: string): void
   /** 新建对话(生成中需二次确认),父调 confirmNewConversation() */
   (e: 'confirm-new-conversation'): void
-  /** 导出失败,父 showToast(msg, 'error') */
-  (e: 'export-error', msg: string): void
 }>()
 
 const { t } = useI18n()
@@ -304,57 +301,23 @@ function cancelRename() {
   editingConvId.value = null
 }
 
-// ── UX-18: 对话导出 ──
-const exportOpenId = ref<string | null>(null)
-const exportingId = ref<string | null>(null)
+// ── 会话项「更多」操作菜单(置顶/归档/删除)──
+const actionsOpenId = ref<string | null>(null)
 
-function toggleExportMenu(id: string) {
-  exportOpenId.value = exportOpenId.value === id ? null : id
+function toggleActionsMenu(id: string) {
+  actionsOpenId.value = actionsOpenId.value === id ? null : id
 }
 
-function sanitizeFilename(title: string | null | undefined, fallback: string): string {
-  const raw = (title || '').trim()
-  if (!raw) return fallback
-  const cleaned = raw.replace(/[\\/:*?"<>|\r\n\t]+/g, '_').replace(/\s+/g, '_')
-  return (cleaned.replace(/^_+|_+$/g, '').slice(0, 60)) || fallback
+function closeActionsMenu() {
+  actionsOpenId.value = null
 }
 
-async function exportConversation(conv: AiConversationSummary, format: 'markdown' | 'json' | 'txt') {
-  exportOpenId.value = null
-  if (exportingId.value) return
-  exportingId.value = conv.id
-  try {
-    const content = await aiApi.exportConversation(conv.id, format)
-    const ext = format === 'markdown' ? 'md' : format === 'json' ? 'json' : 'txt'
-    const mime = format === 'markdown' ? 'text/markdown;charset=utf-8'
-      : format === 'json' ? 'application/json;charset=utf-8'
-      : 'text/plain;charset=utf-8'
-    const base = sanitizeFilename(conv.title, conv.id)
-    const filename = `conversation-${base}.${ext}`
-    const blob = new Blob([content], { type: mime })
-    const url = URL.createObjectURL(blob)
-    const a = document.createElement('a')
-    a.href = url
-    a.download = filename
-    document.body.appendChild(a)
-    a.click()
-    document.body.removeChild(a)
-    setTimeout(() => URL.revokeObjectURL(url), 0)
-  } catch (e: any) {
-    const msg = e?.message || String(e)
-    console.error('[AI] 导出对话失败:', e)
-    emit('export-error', t('aiChat.exportFailed', { msg }))
-  } finally {
-    exportingId.value = null
-  }
-}
-
-// 点击外部关闭导出菜单
-function onExportOutsideClick(e: MouseEvent) {
-  if (!exportOpenId.value) return
+// 点击外部关闭更多操作菜单
+function onActionsOutsideClick(e: MouseEvent) {
+  if (!actionsOpenId.value) return
   const target = e.target as HTMLElement | null
-  if (target?.closest('.ai-conv-item-export')) return
-  exportOpenId.value = null
+  if (target?.closest('.ai-conv-item-more')) return
+  actionsOpenId.value = null
 }
 
 /**
@@ -444,12 +407,12 @@ function onResizeStart(e: MouseEvent) {
 }
 
 onMounted(() => {
-  // UX-18: 点击外部关闭导出格式菜单(原 AiChat onMounted 同段迁移)
-  document.addEventListener('click', onExportOutsideClick)
+  // 点击外部关闭更多操作菜单
+  document.addEventListener('click', onActionsOutsideClick)
 })
 
 onBeforeUnmount(() => {
-  document.removeEventListener('click', onExportOutsideClick)
+  document.removeEventListener('click', onActionsOutsideClick)
   // UX-2025-16:拖拽中途卸载兜底摘临时 document listener(原 AiChat 同段迁移)
   document.removeEventListener('mousemove', onResizeMove)
   document.removeEventListener('mouseup', onResizeEnd)
@@ -684,6 +647,10 @@ body.ai-sidebar-resizing * {
 .ai-conv-item:hover .ai-conv-item-actions {
   display: flex;
 }
+/* 菜单展开时强制 actions 可见(鼠标移到菜单上 item 不再 hover,防菜单消失) */
+.ai-conv-item:has(.ai-conv-actions-menu) .ai-conv-item-actions {
+  display: flex;
+}
 .ai-conv-item-act {
   display: flex;
   align-items: center;
@@ -701,36 +668,27 @@ body.ai-sidebar-resizing * {
   background: var(--df-sidebar-hover);
   color: var(--df-text);
 }
-.ai-conv-item-act:last-child:hover {
-  background: var(--df-danger-bg);
-  color: var(--df-danger);
-}
-/* UX-17: 置顶按钮高亮态(已置顶时常驻强调色,不依赖 hover) */
-.ai-conv-item-act--pinned {
-  color: var(--df-accent, var(--df-text));
-}
-/* CR-22-1: 已置顶对话视觉强调(左边线,不依赖 hover 图钉一眼识别)。
-   原方案「图钉常驻」与 hover 浮出 actions 矛盾(父 display:none 压制子),
-   改用 :has 给已置顶 item 左 accent 边线,hover 浮出操作不变。 */
-.ai-conv-item:has(.ai-conv-item-act--pinned) {
+/* CR-22-1: 已置顶对话视觉强调(左边线,不依赖菜单展开,一眼识别)。
+   pinned 类挂在 .ai-conv-item 上(操作收进更多菜单后,按钮不再常驻,改 item 级类)。 */
+.ai-conv-item--pinned {
   box-shadow: inset 2px 0 0 var(--df-accent, var(--df-text));
 }
-/* ── UX-18: 对话导出按钮 + 格式菜单 ──
-   导出按钮位于归档与删除之间(非 last-child,保持删除按钮 :last-child 红色态不被破坏)。
-   菜单绝对定位浮于 item 下方右侧,窄侧栏优先避免溢出。 */
-.ai-conv-item-export {
+/* ── 「更多」操作菜单(置顶/归档/删除)──
+   「...」按钮 hover 时随 actions 浮出(同原 4 按钮交互),点击展开下拉。
+   菜单绝对定位浮于 item 下方右侧,窄侧栏避免溢出。 */
+.ai-conv-item-more {
   position: relative;
   display: flex;
   align-items: center;
   flex-shrink: 0;
 }
-.ai-conv-export-menu {
+.ai-conv-actions-menu {
   position: absolute;
   top: 100%;
   right: 0;
   margin-top: 2px;
   z-index: 20;
-  min-width: 84px;
+  min-width: 104px;
   padding: 2px;
   display: flex;
   flex-direction: column;
@@ -740,20 +698,27 @@ body.ai-sidebar-resizing * {
   border-radius: var(--df-radius-sm);
   box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
 }
-.ai-conv-export-opt {
+.ai-conv-actions-opt {
+  display: flex;
+  align-items: center;
+  gap: 6px;
   border: none;
   background: transparent;
   text-align: left;
-  padding: 4px 8px;
+  padding: 5px 8px;
   font-size: 11px;
   color: var(--df-text);
   cursor: pointer;
   border-radius: var(--df-radius-sm);
   white-space: nowrap;
 }
-.ai-conv-export-opt:hover {
+.ai-conv-actions-opt:hover {
   background: var(--df-sidebar-hover);
 }
+.ai-conv-actions-opt--danger:hover {
+  background: var(--df-danger-bg);
+  color: var(--df-danger);
+}
 .ai-conv-empty {
   padding: 16px 8px;
   text-align: center;
diff --git a/src/i18n/en/aiChat.ts b/src/i18n/en/aiChat.ts
index 4472cc1..73b3db8 100644
--- a/src/i18n/en/aiChat.ts
+++ b/src/i18n/en/aiChat.ts
@@ -9,6 +9,7 @@ export default {
     unarchive: 'Unarchive',
     pinConversation: 'Pin',
     unpinConversation: 'Unpin',
+    moreActions: 'More actions',
     archived: 'Archived',
     archivedCount: 'Archived ({n})',
     emptyConversation: 'No conversations',
@@ -154,12 +155,6 @@ export default {
     dirAuthDeny: 'Deny',
     dirAuthFailed: 'Authorization failed: {msg}',
 
-    // ── UX-18: conversation export (sidebar hover, pick format to download) ──
-    exportConversation: 'Export chat',
-    exportMarkdown: 'Markdown',
-    exportJson: 'JSON',
-    exportTxt: 'Plain text',
-    exportFailed: 'Export failed: {msg}',
 
     // ── F-15 phase 2: manual context management (clear / compress) ──
     // Buttons (Header action area: trash + compress icon)
diff --git a/src/i18n/zh-CN/aiChat.ts b/src/i18n/zh-CN/aiChat.ts
index c8265ba..613fe75 100644
--- a/src/i18n/zh-CN/aiChat.ts
+++ b/src/i18n/zh-CN/aiChat.ts
@@ -9,6 +9,7 @@ export default {
     unarchive: '取消归档',
     pinConversation: '置顶',
     unpinConversation: '取消置顶',
+    moreActions: '更多操作',
     archived: '已归档',
     archivedCount: '已归档 ({n})',
     emptyConversation: '暂无对话',
@@ -155,12 +156,6 @@ export default {
     dirAuthDeny: '拒绝',
     dirAuthFailed: '授权失败:{msg}',
 
-    // ── UX-18:对话导出(侧栏 hover 浮出,选格式下载) ──
-    exportConversation: '导出对话',
-    exportMarkdown: 'Markdown',
-    exportJson: 'JSON',
-    exportTxt: '纯文本',
-    exportFailed: '导出失败:{msg}',
 
     // ── F-15 阶段2: 手动上下文管理(清空 / 压缩) ──
     // 按钮(Header 操作区:垃圾桶 + 压缩图标)