diff --git a/frontend-web/src/components/workspace/agents/agent-chat-sidebar.tsx b/frontend-web/src/components/workspace/agents/agent-chat-sidebar.tsx
index 03fddad8..6863e4c4 100644
--- a/frontend-web/src/components/workspace/agents/agent-chat-sidebar.tsx
+++ b/frontend-web/src/components/workspace/agents/agent-chat-sidebar.tsx
@@ -1,10 +1,46 @@
 "use client";
 
-import { Bot, Loader2, Search, X } from "lucide-react";
+import {
+  Bot,
+  Download,
+  FileJson,
+  FileText,
+  Loader2,
+  MessageSquare,
+  MoreHorizontal,
+  Pencil,
+  Pin,
+  PinOff,
+  Search,
+  Share2,
+  Star,
+  Trash2,
+  X,
+} from "lucide-react";
 import Link from "next/link";
-import { useEffect, useMemo, useState } from "react";
+import { useParams, usePathname, useRouter } from "next/navigation";
+import { useCallback, useEffect, useMemo, useState } from "react";
+import { toast } from "sonner";
 
 import { agentColor } from "@/components/workspace/agent-icon-color";
+import { Button } from "@/components/ui/button";
+import {
+  Dialog,
+  DialogContent,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuSub,
+  DropdownMenuSubContent,
+  DropdownMenuSubTrigger,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
 import { Input } from "@/components/ui/input";
 import {
   Select,
@@ -13,11 +49,35 @@ import {
   SelectTrigger,
   SelectValue,
 } from "@/components/ui/select";
+import { ShareConversationDialog } from "@/components/workspace/thread-share-dialogs";
 import { useTheme } from "@/contexts/ThemeContext";
 import { useAgentsPaginated } from "@/core/agents";
+import { getAPIClient } from "@/core/api";
+import { useI18n } from "@/core/i18n/hooks";
 import { useRouteBase } from "@/core/route-base";
 import { usePublishSquares } from "@/core/system-settings/hooks";
+import {
+  exportThreadAsJSON,
+  exportThreadAsMarkdown,
+} from "@/core/threads/export";
+import {
+  useDeleteThread,
+  useRenameThread,
+  useThreads,
+  useToggleThreadFavorite,
+  useToggleThreadPin,
+} from "@/core/threads/hooks";
+import type { AgentThread, AgentThreadState } from "@/core/threads/types";
+import {
+  isThreadFavorite,
+  isThreadPinned,
+  sortThreadsPinnedFirst,
+  titleOfThread,
+  usePathOfThread,
+} from "@/core/threads/utils";
+import { env } from "@/env";
 import { desensitize } from "@/lib/desensitize";
+import { isIMEComposing } from "@/lib/ime";
 import { cn } from "@/lib/utils";
 
 /** 「我的」作用域的下拉选项值；其余选项值为各发布广场（publish square）的 id。 */
@@ -27,18 +87,23 @@ const MINE_SCOPE = "mine";
 // 避免静默截断。侧边栏只做快速切换，不在此分页。
 const LIST_PAGE_SIZE = 50;
 
+// 「最近的对话」未搜索时最多展示条数（与首页「通用问答」左栏一致）。
+const MAX_RECENT_CHATS = 10;
+
 /**
- * 智能体问答页左侧「智能体列表」栏。
+ * 智能体问答页左侧「智能体列表 + 最近对话」栏（参考首页通用问答左栏）。
  *
- * - 顶部下拉：选「我的」（默认，= 我创建/收藏的）或任一「广场」（发布广场 publish square），
- *   与「智能体管理」页的主标签一致。
- * - 下方：所选作用域下的智能体列表；点击进入该智能体的新对话（保持当前路由命名空间）。
- * - 当前正在对话的智能体高亮。
+ * 自上而下：
+ *   1. 顶部下拉：选「我的」（默认，= 我创建/收藏的）或任一「广场」（发布广场），
+ *      与「智能体管理」页主标签一致；下方为智能体名称模糊搜索框。
+ *   2. 智能体列表：所选作用域下的智能体；点击进入该智能体的新对话。当前智能体高亮。
+ *   3. 最近的对话：跨智能体的近期会话（参考首页），点击打开；支持重命名/置顶/收藏/
+ *      分享/导出/删除。当前会话高亮。
  *
- * 仅在独立的智能体问答整页（/page/strategy|workspace/agents/:id/chats/:thread）展示；
- * 任务工作区 / zzJC·zzXD 模块 / 嵌入态不展示（它们各有自己的左栏）。
+ * 仅在独立的智能体问答整页展示；任务工作区 / zzJC·zzXD 模块 / 嵌入态不展示。
  */
 export function AgentChatSidebar({ activeAgentId }: { activeAgentId?: string }) {
+  const { t } = useI18n();
   const routeBase = useRouteBase();
   const { theme } = useTheme();
   const isDark = theme === "dark";
@@ -124,8 +189,11 @@ export function AgentChatSidebar({ activeAgentId }: { activeAgentId?: string })
         </div>
       </div>
 
-      {/* 智能体列表 */}
-      <div className="flex min-h-0 flex-1 flex-col overflow-y-auto px-2 py-3">
+      {/* 智能体列表（上半，独立滚动） */}
+      <div className="flex min-h-0 flex-[3] flex-col overflow-y-auto px-2 py-3">
+        <h2 className="mb-1 px-3 py-1 text-[11px] font-semibold tracking-[0.04em] text-muted-foreground/80 select-none">
+          智能体
+        </h2>
         {isLoading && agents.length === 0 ? (
           <div className="text-muted-foreground flex h-24 items-center justify-center gap-2 text-xs">
             <Loader2 className="size-3.5 animate-spin" />
@@ -186,19 +254,325 @@ export function AgentChatSidebar({ activeAgentId }: { activeAgentId?: string })
                 </Link>
               );
             })}
+            {/* 超出一页时引导到完整的智能体管理页（不在侧边栏静默截断） */}
+            {total > agents.length && (
+              <Link
+                href={`${routeBase}/agents`}
+                className="text-muted-foreground hover:text-foreground mt-0.5 rounded-lg px-3 py-1.5 text-center text-xs transition-colors hover:bg-accent/50"
+              >
+                共 {total} 个，查看全部 →
+              </Link>
+            )}
           </div>
         )}
       </div>
 
-      {/* 底部：超出一页时引导到完整的智能体管理页（不在侧边栏静默截断） */}
-      {total > agents.length && (
-        <Link
-          href={`${routeBase}/agents`}
-          className="text-muted-foreground hover:text-foreground shrink-0 border-t border-border/60 px-3 py-2 text-center text-xs transition-colors"
-        >
-          共 {total} 个，查看全部 →
-        </Link>
-      )}
+      {/* 最近的对话（下半，独立滚动）—— 参考首页通用问答左栏 */}
+      <RecentChatsPane activeAgentId={activeAgentId} />
     </aside>
   );
 }
+
+/**
+ * 「最近的对话」面板（参考首页 GeneralQaSidebar 的「最近的对话」区块）。
+ * 跨智能体的近期会话，点击打开；支持重命名/置顶/收藏/分享/导出/删除。
+ */
+function RecentChatsPane({ activeAgentId }: { activeAgentId?: string }) {
+  const { t } = useI18n();
+  const pathname = usePathname();
+  const router = useRouter();
+  const pathOf = usePathOfThread();
+
+  const { thread_id: threadIdFromPath } = useParams<{ thread_id: string }>();
+  const { data: threads = [] } = useThreads();
+  const { mutate: deleteThread } = useDeleteThread();
+  const { mutate: renameThread } = useRenameThread();
+  const { toggle: togglePin } = useToggleThreadPin();
+  const { toggle: toggleFavorite } = useToggleThreadFavorite();
+
+  const [query, setQuery] = useState("");
+  const [renameDialogOpen, setRenameDialogOpen] = useState(false);
+  const [renameThreadId, setRenameThreadId] = useState<string | null>(null);
+  const [renameValue, setRenameValue] = useState("");
+  const [shareThreadId, setShareThreadId] = useState<string | null>(null);
+
+  // 排除调度/引导/会商类会话，与首页一致；置顶优先。
+  const visibleThreads = useMemo(
+    () =>
+      sortThreadsPinnedFirst(
+        threads.filter(
+          (thread) =>
+            thread.metadata?.thread_type !== "scheduler" &&
+            thread.metadata?.thread_type !== "bootstrap" &&
+            thread.metadata?.thread_type !== "roundtable",
+        ),
+      ),
+    [threads],
+  );
+
+  const filteredThreads = useMemo(() => {
+    const q = query.trim().toLowerCase();
+    const list = q
+      ? visibleThreads.filter((thread) =>
+          titleOfThread(thread, t.pages.newChat).toLowerCase().includes(q),
+        )
+      : visibleThreads;
+    return q ? list : list.slice(0, MAX_RECENT_CHATS);
+  }, [visibleThreads, query, t.pages.newChat]);
+
+  const handleDelete = useCallback(
+    (threadId: string) => {
+      deleteThread({ threadId });
+      if (threadId === threadIdFromPath) {
+        const threadIndex = threads.findIndex((th) => th.thread_id === threadId);
+        let nextThreadPath = pathOf("new", { agent_id: activeAgentId });
+        if (threadIndex > -1) {
+          if (threads[threadIndex + 1]) {
+            nextThreadPath = pathOf(threads[threadIndex + 1]!);
+          } else if (threads[threadIndex - 1]) {
+            nextThreadPath = pathOf(threads[threadIndex - 1]!);
+          }
+        }
+        void router.push(nextThreadPath);
+      }
+    },
+    [activeAgentId, deleteThread, pathOf, router, threadIdFromPath, threads],
+  );
+
+  const handleRenameClick = useCallback(
+    (threadId: string, currentTitle: string) => {
+      setRenameThreadId(threadId);
+      setRenameValue(currentTitle);
+      setRenameDialogOpen(true);
+    },
+    [],
+  );
+
+  const handleRenameSubmit = useCallback(() => {
+    if (renameThreadId && renameValue.trim()) {
+      renameThread({ threadId: renameThreadId, title: renameValue.trim() });
+      setRenameDialogOpen(false);
+      setRenameThreadId(null);
+      setRenameValue("");
+    }
+  }, [renameThread, renameThreadId, renameValue]);
+
+  const handleExport = useCallback(
+    async (thread: AgentThread, format: "markdown" | "json") => {
+      try {
+        const apiClient = getAPIClient();
+        const state = await apiClient.threads.getState<AgentThreadState>(
+          thread.thread_id,
+        );
+        const messages = state.values?.messages ?? [];
+        if (messages.length === 0) {
+          toast.error(t.conversation.noMessages);
+          return;
+        }
+        if (format === "markdown") exportThreadAsMarkdown(thread, messages);
+        else exportThreadAsJSON(thread, messages);
+        toast.success(t.common.exportSuccess);
+      } catch {
+        toast.error("Failed to export conversation");
+      }
+    },
+    [t],
+  );
+
+  const isStatic = env.NEXT_PUBLIC_STATIC_WEBSITE_ONLY === "true";
+
+  return (
+    <div className="flex min-h-0 flex-[2] flex-col overflow-y-auto border-t border-border/60 px-2 py-3">
+      <h2 className="mb-1 flex items-center gap-1.5 px-3 py-1 text-[11px] font-semibold tracking-[0.04em] text-muted-foreground/80 select-none">
+        <span>{t.sidebar.recentChats}</span>
+        <span className="rounded-full bg-muted px-1.5 py-0.5 text-[10px] font-normal text-muted-foreground tabular-nums">
+          {visibleThreads.length}
+        </span>
+      </h2>
+
+      {/* 历史会话搜索框 */}
+      <div className="relative mb-1.5 px-1">
+        <Search className="text-muted-foreground/60 pointer-events-none absolute top-1/2 left-3.5 size-3.5 -translate-y-1/2" />
+        <Input
+          value={query}
+          onChange={(e) => setQuery(e.target.value)}
+          placeholder="搜索历史会话…"
+          className="h-8 rounded-lg border-border bg-card pl-8 text-[12px]"
+        />
+      </div>
+
+      <div className="flex flex-col gap-0.5">
+        {filteredThreads.length === 0 ? (
+          <div className="text-muted-foreground/70 px-3 py-4 text-center text-[12px]">
+            {query ? "没有匹配的会话" : t.chats.noChats}
+          </div>
+        ) : (
+          filteredThreads.map((thread) => {
+            const href = pathOf(thread);
+            const isActive = href === pathname;
+            const pinned = isThreadPinned(thread);
+            const favorited = isThreadFavorite(thread);
+            return (
+              <div
+                key={thread.thread_id}
+                className="group/item relative flex items-center"
+              >
+                <Link
+                  href={href}
+                  className={cn(
+                    "relative flex h-9 min-w-0 flex-1 items-center gap-2 rounded-lg px-2.5 text-[13px] transition-colors",
+                    isActive
+                      ? "border border-primary/40 bg-primary/5 font-medium text-primary"
+                      : "text-muted-foreground hover:bg-accent/60 hover:text-foreground",
+                  )}
+                >
+                  <MessageSquare
+                    className={cn(
+                      "size-3.5 shrink-0",
+                      isActive ? "text-primary" : "text-muted-foreground/70",
+                    )}
+                  />
+                  {pinned && (
+                    <Pin className="text-muted-foreground/70 size-3 shrink-0" />
+                  )}
+                  <span className="truncate">
+                    {desensitize(titleOfThread(thread, t.pages.newChat))}
+                  </span>
+                  {isActive && (
+                    <span className="absolute top-1/2 right-1 h-5 w-1 -translate-y-1/2 rounded-full bg-primary" />
+                  )}
+                </Link>
+                {!isStatic && (
+                  <DropdownMenu>
+                    <DropdownMenuTrigger asChild>
+                      <button
+                        type="button"
+                        className="text-muted-foreground hover:bg-background group-hover/item:opacity-100 data-[state=open]:opacity-100 absolute right-1 flex size-6 items-center justify-center rounded-md opacity-0 transition-opacity"
+                      >
+                        <MoreHorizontal className="size-4" />
+                        <span className="sr-only">{t.common.more}</span>
+                      </button>
+                    </DropdownMenuTrigger>
+                    <DropdownMenuContent
+                      className="w-48 rounded-lg"
+                      side="right"
+                      align="start"
+                    >
+                      <DropdownMenuItem
+                        onSelect={() =>
+                          handleRenameClick(
+                            thread.thread_id,
+                            titleOfThread(thread, t.pages.newChat),
+                          )
+                        }
+                      >
+                        <Pencil className="text-muted-foreground" />
+                        <span>{t.common.rename}</span>
+                      </DropdownMenuItem>
+                      <DropdownMenuItem
+                        onSelect={() => togglePin(thread.thread_id, !pinned)}
+                      >
+                        {pinned ? (
+                          <PinOff className="text-muted-foreground" />
+                        ) : (
+                          <Pin className="text-muted-foreground" />
+                        )}
+                        <span>{pinned ? t.common.unpin : t.common.pin}</span>
+                      </DropdownMenuItem>
+                      <DropdownMenuItem
+                        onSelect={() =>
+                          toggleFavorite(thread.thread_id, !favorited)
+                        }
+                      >
+                        <Star
+                          className={
+                            favorited
+                              ? "fill-amber-400 text-amber-400"
+                              : "text-muted-foreground"
+                          }
+                        />
+                        <span>
+                          {favorited ? t.common.unfavorite : t.common.favorite}
+                        </span>
+                      </DropdownMenuItem>
+                      <DropdownMenuItem
+                        onSelect={() => setShareThreadId(thread.thread_id)}
+                      >
+                        <Share2 className="text-muted-foreground" />
+                        <span>{t.common.share}</span>
+                      </DropdownMenuItem>
+                      <DropdownMenuSub>
+                        <DropdownMenuSubTrigger>
+                          <Download className="text-muted-foreground" />
+                          <span>{t.common.export}</span>
+                        </DropdownMenuSubTrigger>
+                        <DropdownMenuSubContent>
+                          <DropdownMenuItem
+                            onSelect={() => handleExport(thread, "markdown")}
+                          >
+                            <FileText className="text-muted-foreground" />
+                            <span>{t.common.exportAsMarkdown}</span>
+                          </DropdownMenuItem>
+                          <DropdownMenuItem
+                            onSelect={() => handleExport(thread, "json")}
+                          >
+                            <FileJson className="text-muted-foreground" />
+                            <span>{t.common.exportAsJSON}</span>
+                          </DropdownMenuItem>
+                        </DropdownMenuSubContent>
+                      </DropdownMenuSub>
+                      <DropdownMenuSeparator />
+                      <DropdownMenuItem
+                        onSelect={() => handleDelete(thread.thread_id)}
+                      >
+                        <Trash2 className="text-muted-foreground" />
+                        <span>{t.common.delete}</span>
+                      </DropdownMenuItem>
+                    </DropdownMenuContent>
+                  </DropdownMenu>
+                )}
+              </div>
+            );
+          })
+        )}
+      </div>
+
+      {/* 重命名弹窗 */}
+      <Dialog open={renameDialogOpen} onOpenChange={setRenameDialogOpen}>
+        <DialogContent className="sm:max-w-[425px]">
+          <DialogHeader>
+            <DialogTitle>{t.common.rename}</DialogTitle>
+          </DialogHeader>
+          <div className="py-4">
+            <Input
+              value={renameValue}
+              onChange={(e) => setRenameValue(e.target.value)}
+              placeholder={t.common.rename}
+              onKeyDown={(e) => {
+                if (e.key === "Enter" && !isIMEComposing(e)) {
+                  e.preventDefault();
+                  handleRenameSubmit();
+                }
+              }}
+            />
+          </div>
+          <DialogFooter>
+            <Button variant="outline" onClick={() => setRenameDialogOpen(false)}>
+              {t.common.cancel}
+            </Button>
+            <Button onClick={handleRenameSubmit}>{t.common.save}</Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+
+      {/* 分享弹窗 */}
+      <ShareConversationDialog
+        threadId={shareThreadId}
+        open={shareThreadId !== null}
+        onOpenChange={(o) => {
+          if (!o) setShareThreadId(null);
+        }}
+      />
+    </div>
+  );
+}