diff --git a/client/src/components/DashboardLayout.tsx b/client/src/components/DashboardLayout.tsx
index 0bf7437..cf11424 100644
--- a/client/src/components/DashboardLayout.tsx
+++ b/client/src/components/DashboardLayout.tsx
@@ -1,15 +1,7 @@
 import { useAuth } from "@/_core/hooks/useAuth";
-import { Avatar, AvatarFallback } from "@/components/ui/avatar";
-import {
-  DropdownMenu,
-  DropdownMenuContent,
-  DropdownMenuItem,
-  DropdownMenuTrigger,
-} from "@/components/ui/dropdown-menu";
 import {
   Sidebar,
   SidebarContent,
-  SidebarFooter,
   SidebarHeader,
   SidebarInset,
   SidebarMenu,
@@ -21,7 +13,7 @@ import {
 } from "@/components/ui/sidebar";
 import { getLoginUrl } from "@/const";
 import { useIsMobile } from "@/hooks/useMobile";
-import { LayoutDashboard, LogOut, PanelLeft, Users } from "lucide-react";
+import { LayoutDashboard, PanelLeft, Users } from "lucide-react";
 import { CSSProperties, useEffect, useRef, useState } from "react";
 import { useLocation } from "wouter";
 import { DashboardLayoutSkeleton } from './DashboardLayoutSkeleton';
@@ -106,7 +98,6 @@ function DashboardLayoutContent({
   children,
   setSidebarWidth,
 }: DashboardLayoutContentProps) {
-  const { user, logout } = useAuth();
   const [location, setLocation] = useLocation();
   const { state, toggleSidebar } = useSidebar();
   const isCollapsed = state === "collapsed";
@@ -201,36 +192,6 @@ function DashboardLayoutContent({
             </SidebarMenu>
           </SidebarContent>
 
-          <SidebarFooter className="p-3">
-            <DropdownMenu>
-              <DropdownMenuTrigger asChild>
-                <button className="flex items-center gap-3 rounded-lg px-1 py-1 hover:bg-accent/50 transition-colors w-full text-left group-data-[collapsible=icon]:justify-center focus:outline-none focus-visible:ring-2 focus-visible:ring-ring">
-                  <Avatar className="h-9 w-9 border shrink-0">
-                    <AvatarFallback className="text-xs font-medium">
-                      {user?.name?.charAt(0).toUpperCase()}
-                    </AvatarFallback>
-                  </Avatar>
-                  <div className="flex-1 min-w-0 group-data-[collapsible=icon]:hidden">
-                    <p className="text-sm font-medium truncate leading-none">
-                      {user?.name || "-"}
-                    </p>
-                    <p className="text-xs text-muted-foreground truncate mt-1.5">
-                      {user?.email || "-"}
-                    </p>
-                  </div>
-                </button>
-              </DropdownMenuTrigger>
-              <DropdownMenuContent align="end" className="w-48">
-                <DropdownMenuItem
-                  onClick={logout}
-                  className="cursor-pointer text-destructive focus:text-destructive"
-                >
-                  <LogOut className="mr-2 h-4 w-4" />
-                  <span>Sign out</span>
-                </DropdownMenuItem>
-              </DropdownMenuContent>
-            </DropdownMenu>
-          </SidebarFooter>
         </Sidebar>
         <div
           className={`absolute top-0 right-0 w-1 h-full cursor-col-resize hover:bg-primary/20 transition-colors ${isCollapsed ? "hidden" : ""}`}
diff --git a/client/src/components/TaskManager.tsx b/client/src/components/TaskManager.tsx
index 020e9cc..0212db6 100644
--- a/client/src/components/TaskManager.tsx
+++ b/client/src/components/TaskManager.tsx
@@ -616,20 +616,31 @@ export default function TaskManager({
                 )}
               </div>
 
-              <button
-                className="industrial-btn industrial-btn-primary w-full py-1 text-[10px] flex items-center justify-center gap-1"
-                disabled={activeTaskId == null || selectedModelPcFileIds.size === 0 || linkPcFilesFromModel.isPending}
-                onClick={() => {
-                  if (activeTaskId == null || selectedModelPcFileIds.size === 0) return;
-                  linkPcFilesFromModel.mutate({
-                    taskId: activeTaskId,
-                    modelPointcloudFileIds: Array.from(selectedModelPcFileIds),
-                  });
-                }}
-              >
-                <Plus className="w-3 h-3" />
-                添加到当前任务{selectedModelPcFileIds.size > 0 ? ` (${selectedModelPcFileIds.size})` : ''}
-              </button>
+              <div className="flex items-center gap-1">
+                <button
+                  className="industrial-btn industrial-btn-primary flex-1 min-w-0 py-1 text-[10px] flex items-center justify-center gap-1"
+                  disabled={activeTaskId == null || selectedModelPcFileIds.size === 0 || linkPcFilesFromModel.isPending}
+                  onClick={() => {
+                    if (activeTaskId == null || selectedModelPcFileIds.size === 0) return;
+                    linkPcFilesFromModel.mutate({
+                      taskId: activeTaskId,
+                      modelPointcloudFileIds: Array.from(selectedModelPcFileIds),
+                    });
+                  }}
+                >
+                  <Plus className="w-3 h-3" />
+                  添加到当前任务{selectedModelPcFileIds.size > 0 ? ` (${selectedModelPcFileIds.size})` : ''}
+                </button>
+                <button
+                  type="button"
+                  className="industrial-btn w-7 flex-shrink-0 px-0 py-1 text-[10px] flex items-center justify-center bg-red-900/55 border-red-500/60 text-red-100 hover:bg-red-800/70 hover:border-red-400"
+                  title="关闭车型点云库"
+                  aria-label="关闭车型点云库"
+                  onClick={() => setPcLibraryOpen(false)}
+                >
+                  <X className="w-3 h-3 flex-shrink-0" />
+                </button>
+              </div>
             </div>
           )}
 
@@ -848,20 +859,31 @@ export default function TaskManager({
                 )}
               </div>
 
-              <button
-                className="industrial-btn industrial-btn-primary w-full py-1 text-[10px] flex items-center justify-center gap-1"
-                disabled={activeTaskId == null || selectedModelCadFileIds.size === 0 || linkCadFilesFromModel.isPending}
-                onClick={() => {
-                  if (activeTaskId == null || selectedModelCadFileIds.size === 0) return;
-                  linkCadFilesFromModel.mutate({
-                    taskId: activeTaskId,
-                    modelCadFileIds: Array.from(selectedModelCadFileIds),
-                  });
-                }}
-              >
-                <Plus className="w-3 h-3" />
-                添加到当前任务{selectedModelCadFileIds.size > 0 ? ` (${selectedModelCadFileIds.size})` : ''}
-              </button>
+              <div className="flex items-center gap-1">
+                <button
+                  className="industrial-btn industrial-btn-primary flex-1 min-w-0 py-1 text-[10px] flex items-center justify-center gap-1"
+                  disabled={activeTaskId == null || selectedModelCadFileIds.size === 0 || linkCadFilesFromModel.isPending}
+                  onClick={() => {
+                    if (activeTaskId == null || selectedModelCadFileIds.size === 0) return;
+                    linkCadFilesFromModel.mutate({
+                      taskId: activeTaskId,
+                      modelCadFileIds: Array.from(selectedModelCadFileIds),
+                    });
+                  }}
+                >
+                  <Plus className="w-3 h-3" />
+                  添加到当前任务{selectedModelCadFileIds.size > 0 ? ` (${selectedModelCadFileIds.size})` : ''}
+                </button>
+                <button
+                  type="button"
+                  className="industrial-btn w-7 flex-shrink-0 px-0 py-1 text-[10px] flex items-center justify-center bg-red-900/55 border-red-500/60 text-red-100 hover:bg-red-800/70 hover:border-red-400"
+                  title="关闭车型 CAD 库"
+                  aria-label="关闭车型 CAD 库"
+                  onClick={() => setCadLibraryOpen(false)}
+                >
+                  <X className="w-3 h-3 flex-shrink-0" />
+                </button>
+              </div>
             </div>
           )}