diff --git a/frontend-web/src/components/page-sidebar-v1.tsx b/frontend-web/src/components/page-sidebar-v1.tsx
new file mode 100644
index 00000000..58e59a72
--- /dev/null
+++ b/frontend-web/src/components/page-sidebar-v1.tsx
@@ -0,0 +1,303 @@
+import { useEffect, useState } from "react";
+import { useNavigate, useLocation } from "react-router-dom";
+import {
+  Bell,
+  ChevronLeft,
+  ChevronRight,
+  ChevronsUpDown,
+  Folder,
+  FolderOpen,
+  Settings,
+  User,
+  Wrench,
+} from "lucide-react";
+
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+import { NotificationDialog } from "@/components/workspace/notification-dialog";
+import { SettingsDialog } from "@/components/workspace/settings";
+import { useTheme } from "@/contexts/ThemeContext";
+import { getStoredAuth } from "@/core/auth";
+import { useI18n } from "@/core/i18n/hooks";
+import { useUnreadCount } from "@/core/notifications";
+import {
+  defaultExpandedIds,
+  type MenuItem,
+} from "@/core/page-layout/sidebar-menu";
+import { useSidebarMenuItems } from "@/core/page-layout/use-sidebar-menu";
+
+type PageSidebarProps = {
+  collapsed: boolean;
+  onToggleCollapsed: () => void;
+};
+
+type SettingsSection = "account" | "appearance" | "memory" | "tools" | "about";
+
+export function PageSidebar({
+  collapsed,
+  onToggleCollapsed,
+}: PageSidebarProps) {
+  const { theme } = useTheme();
+  const isDark = theme === "dark";
+  const isAdmin = getStoredAuth()?.system_role === "admin";
+  const visibleMenuItems = useSidebarMenuItems(!!isAdmin);
+  const { t } = useI18n();
+  const { data: unreadCount = 0 } = useUnreadCount();
+  // defaultExpandedIds 是共享的 ReadonlySet，复制一份给 useState（避免外部突变）
+  const [expandedIds, setExpandedIds] = useState<Set<string>>(() => new Set(defaultExpandedIds));
+  const [settingsOpen, setSettingsOpen] = useState(false);
+  const [settingsDefaultSection, setSettingsDefaultSection] =
+    useState<SettingsSection>("appearance");
+  const [notificationOpen, setNotificationOpen] = useState(false);
+  const [mounted, setMounted] = useState(false);
+  const navigate = useNavigate();
+  const { pathname } = useLocation();
+
+  useEffect(() => {
+    setMounted(true);
+  }, []);
+
+  const openSettings = (section: SettingsSection) => {
+    setSettingsDefaultSection(section);
+    setSettingsOpen(true);
+  };
+
+  const iconButtonClass = isDark
+    ? "rounded-lg p-2 text-slate-400 transition-all duration-300 ease-out hover:scale-105 hover:bg-slate-800/50 hover:text-white"
+    : "rounded-lg p-2 text-gray-500 transition-all duration-300 ease-out hover:scale-105 hover:bg-red-50 hover:text-red-600";
+  const panelClass = isDark
+    ? "ml-4 space-y-1 border-l border-blue-800/30 pl-4"
+    : "ml-4 space-y-1 border-l border-red-100 pl-4";
+  const labelClass = (compact: boolean, small = false) =>
+    `overflow-hidden whitespace-nowrap transition-all duration-300 ease-out ${
+      compact ? "max-w-0 opacity-0" : "max-w-[220px] opacity-100"
+    } ${small ? "text-xs" : "text-sm"} flex-1 font-medium`;
+  const menuButtonClass = (isActive: boolean, depth = 0) =>
+    `group relative flex w-full items-center rounded-[2px] py-2 text-left transition-all duration-300 ease-out theme-transition ${
+      collapsed && depth === 0 ? "justify-center px-2" : "gap-3 px-3"
+    } ${
+      isActive
+        ? isDark
+          ? "bg-blue-500/15 text-cyan-300 font-semibold"
+          : "bg-red-50 text-red-600 font-semibold"
+        : isDark
+          ? "text-slate-400 hover:bg-slate-800/50 hover:text-white"
+          : "text-gray-600 hover:bg-red-50 hover:text-red-600"
+    }`;
+  const footerButtonClass = menuButtonClass(false, 0);
+
+  const toggleExpanded = (id: string) => {
+    setExpandedIds((prev) => {
+      const next = new Set(prev);
+      if (next.has(id)) {
+        next.delete(id);
+      } else {
+        next.add(id);
+      }
+      return next;
+    });
+  };
+
+  const renderLeaf = (item: MenuItem, depth = 0) => {
+    const Icon = item.icon;
+    const isActive = !!item.path && pathname === item.path;
+
+    return (
+      <button
+        key={item.id}
+        type="button"
+        title={collapsed && depth === 0 ? item.label : undefined}
+        onClick={() => item.path && navigate(item.path)}
+        className={menuButtonClass(isActive, depth)}
+      >
+        {isActive && (
+          <span
+            className={`absolute left-0 inset-y-0 w-[3px] rounded-r ${
+              isDark ? "bg-cyan-300" : "bg-red-600"
+            }`}
+          />
+        )}
+        <Icon className={`${depth === 0 ? "h-[18px] w-[18px]" : "h-4 w-4"} flex-shrink-0 transition-transform duration-300 ease-out group-hover:scale-105`} />
+        {(!collapsed || depth > 0) && (
+          <span className={labelClass(false, depth > 0)}>
+            {item.label}
+          </span>
+        )}
+      </button>
+    );
+  };
+
+  const renderBranch = (item: MenuItem, depth = 0) => {
+    const expanded = expandedIds.has(item.id);
+    const isTopLevel = depth === 0;
+    const Icon = depth > 0 && item.icon === Folder && expanded ? FolderOpen : item.icon;
+
+    return (
+      <div key={item.id} className="space-y-1">
+        <button
+          type="button"
+          onClick={() => {
+            if (collapsed && isTopLevel) {
+              onToggleCollapsed();
+              return;
+            }
+            toggleExpanded(item.id);
+          }}
+          title={collapsed && isTopLevel ? item.label : undefined}
+          className={menuButtonClass(false, depth)}
+        >
+          <Icon
+            className={`${isTopLevel ? "h-[18px] w-[18px]" : "h-4 w-4"} flex-shrink-0 transition-transform duration-300 ease-out group-hover:scale-105 ${
+              expanded && depth > 0 ? "scale-105" : ""
+            }`}
+          />
+          {(!collapsed || !isTopLevel) && (
+            <span className={labelClass(false, depth > 0)}>
+              {item.label}
+            </span>
+          )}
+          {(!collapsed || !isTopLevel) && (
+            <ChevronRight
+              className={`h-4 w-4 transition-transform duration-300 ease-out ${expanded ? "rotate-90" : ""}`}
+            />
+          )}
+        </button>
+
+        {(!collapsed || !isTopLevel) && item.children && (
+          <div
+            className={`${panelClass} overflow-hidden transition-all duration-300 ease-out ${
+              expanded ? "max-h-[1200px] opacity-100" : "max-h-0 opacity-0"
+            }`}
+          >
+            {item.children.map((child) =>
+              child.children ? renderBranch(child, depth + 1) : renderLeaf(child, depth + 1),
+            )}
+          </div>
+        )}
+      </div>
+    );
+  };
+
+  return (
+    <>
+      <SettingsDialog
+        open={settingsOpen}
+        onOpenChange={setSettingsOpen}
+        defaultSection={settingsDefaultSection}
+      />
+      <NotificationDialog
+        open={notificationOpen}
+        onOpenChange={setNotificationOpen}
+      />
+      <aside
+        className={`fixed left-0 top-16 z-40 flex h-[calc(100vh-4rem)] flex-col overflow-hidden shadow-sm theme-transition transition-all duration-300 ${
+          isDark
+            ? "border-r border-blue-800/30 bg-slate-900"
+            : "border-r border-red-100 bg-white"
+        } ${collapsed ? "w-16" : "w-64"}`}
+      >
+      <button
+        type="button"
+        onClick={onToggleCollapsed}
+        title={collapsed ? "展开侧边栏" : "收起侧边栏"}
+        className={`absolute -right-3 top-6 z-50 flex h-6 w-6 items-center justify-center rounded-full shadow-md theme-transition ${
+          isDark
+            ? "bg-slate-700 text-slate-300 hover:bg-slate-600"
+            : "bg-white text-gray-500 hover:bg-red-50 hover:text-red-600 border border-red-100"
+        }`}
+      >
+        {collapsed ? <ChevronRight className="h-3 w-3" /> : <ChevronLeft className="h-3 w-3" />}
+      </button>
+
+      <nav className={`flex-1 overflow-y-auto ${collapsed ? "p-2" : "p-4"} space-y-2 transition-all duration-300 ease-out`}>
+        {visibleMenuItems.map((item) =>
+          item.children ? renderBranch(item) : renderLeaf(item),
+        )}
+      </nav>
+
+      <div
+        className={`mt-auto shrink-0 theme-transition ${
+          isDark ? "border-t border-blue-800/30" : "border-t border-red-100"
+        } ${collapsed ? "p-2" : "p-4"}`}
+      >
+        {mounted ? (
+          <DropdownMenu>
+            <DropdownMenuTrigger asChild>
+              <button
+                type="button"
+                title={collapsed ? t.workspace.settingsAndMore : undefined}
+                className={footerButtonClass}
+              >
+                <Settings className="h-5 w-5 flex-shrink-0" />
+                {!collapsed && (
+                  <>
+                    <span className={labelClass(false)}>
+                      {t.workspace.settingsAndMore}
+                    </span>
+                    <ChevronsUpDown className="h-4 w-4 flex-shrink-0" />
+                  </>
+                )}
+              </button>
+            </DropdownMenuTrigger>
+            <DropdownMenuContent
+              align={collapsed ? "start" : "end"}
+              side={collapsed ? "right" : "top"}
+              sideOffset={4}
+              className="min-w-56 rounded-lg"
+            >
+              <DropdownMenuItem onClick={() => setNotificationOpen(true)}>
+                <Bell className="size-4" />
+                {t.notifications.title}
+                {unreadCount > 0 && (
+                  <span
+                    className={`ml-auto flex h-4 min-w-4 items-center justify-center rounded-full px-1 text-[10px] font-medium leading-none text-white ${
+                      isDark ? "bg-cyan-500" : "bg-red-500"
+                    }`}
+                  >
+                    {unreadCount > 99 ? "99+" : unreadCount}
+                  </span>
+                )}
+              </DropdownMenuItem>
+              <DropdownMenuItem onClick={() => openSettings("tools")}>
+                <Wrench className="size-4" />
+                {t.settings.sections.tools}
+              </DropdownMenuItem>
+              <DropdownMenuItem onClick={() => openSettings("account")}>
+                <User className="size-4" />
+                个人信息
+              </DropdownMenuItem>
+            </DropdownMenuContent>
+          </DropdownMenu>
+        ) : (
+          <button
+            type="button"
+            className={`${footerButtonClass} pointer-events-none`}
+          >
+            <Settings className="h-5 w-5 flex-shrink-0" />
+            {!collapsed && (
+              <span className={labelClass(false)}>
+                {t.workspace.settingsAndMore}
+              </span>
+            )}
+          </button>
+        )}
+      </div>
+
+      <div
+        className={`pointer-events-none absolute right-0 top-0 h-32 w-32 rounded-full blur-3xl theme-transition ${
+          isDark ? "bg-blue-500/10" : "bg-red-500/5"
+        }`}
+      />
+      <div
+        className={`pointer-events-none absolute bottom-20 right-0 h-24 w-24 rounded-full blur-3xl theme-transition ${
+          isDark ? "bg-cyan-400/5" : "bg-red-400/5"
+        }`}
+      />
+    </aside>
+    </>
+  );
+}