diff --git a/components/ai-cad/ai-cad-workbench.tsx b/components/ai-cad/ai-cad-workbench.tsx
index 3f9b5cbfa..9d3d54da7 100644
--- a/components/ai-cad/ai-cad-workbench.tsx
+++ b/components/ai-cad/ai-cad-workbench.tsx
@@ -7,7 +7,6 @@ import {
   BrainCircuit,
   CheckCircle2,
   ChevronDown,
-  ChevronLeft,
   ChevronRight,
   Copy,
   Download,
@@ -16,6 +15,7 @@ import {
   GitBranch,
   Grid3X3,
   History,
+  House,
   Loader2,
   MousePointer2,
   Orbit,
@@ -4128,60 +4128,18 @@ export function AiCadWorkbench() {
 
   return (
     <div className="flex h-svh flex-col overflow-hidden bg-[#f8f7f3] text-[#201c16]">
-      <div className="border-[#e6e0d3] border-b bg-white">
-        <div className="flex min-h-14 flex-wrap items-center gap-3 px-3 py-2">
-          <a
-            className="inline-flex h-10 items-center gap-2 rounded-[10px] border border-[#e2dccf] bg-white px-3 text-[#423d33] text-[13px] transition-all duration-150 ease-out hover:bg-[#faf7ef]"
-            href="/"
-          >
-            <ChevronLeft className="h-4 w-4" />
-            返回首页
-          </a>
-          <div className="flex h-10 items-center gap-2 rounded-[10px] border border-[#e2dccf] bg-white px-3">
-            <div className="flex h-8 w-10 items-center justify-center rounded-md bg-[#42ef95] font-semibold text-[#0f2318] text-[11px]">
-              AI
-            </div>
-            <span className="font-medium text-[#201c16] text-[14px]">
-              AI-CAD Studio
-            </span>
-          </div>
-          <button
-            className="flex h-10 min-w-[240px] flex-1 items-center gap-2 rounded-[10px] border border-[#e2dccf] bg-white px-4 text-left text-[#3e392f]"
-            onClick={() => setActiveLeftPanelView("project")}
-            type="button"
-          >
-            <span className="truncate">
-              {normalizedWorkspaceName} / main.kcl
-            </span>
-            <ChevronDown className="ml-auto h-4 w-4 text-[#827b6d]" />
-          </button>
-          <div className="flex h-10 w-10 items-center justify-center rounded-full bg-[#8b572a] text-sm text-white">
-            AI
-          </div>
-        </div>
-
-        {(workspaceSyncError || workspaceOperationError) && (
-          <div className="border-[#e6e0d3] border-t px-3 py-2">
-            <div className="flex flex-wrap gap-3 text-sm leading-6">
-              {workspaceSyncError ? (
-                <p className="text-rose-700">
-                  云端同步提示：{workspaceSyncError}
-                </p>
-              ) : null}
-              {workspaceOperationError ? (
-                <p className="text-amber-700">
-                  工作台提示：{workspaceOperationError}
-                </p>
-              ) : null}
-            </div>
-          </div>
-        )}
-      </div>
-
       <div className="min-h-0 flex-1 overflow-hidden">
         <div className="flex h-full min-h-0">
           <div className="flex w-14 shrink-0 flex-col items-center justify-between border-[#e6e0d3] border-r bg-white px-1.5 py-3">
             <div className="flex flex-col items-center gap-2">
+              <a
+                className="flex h-10 w-10 items-center justify-center rounded-md border border-[#e4dece] bg-white text-[#6f695d] transition-all duration-150 ease-out hover:bg-[#faf7ef] hover:text-[#221f18]"
+                href="/"
+                title="返回首页"
+              >
+                <House className="h-4 w-4" />
+                <span className="sr-only">返回首页</span>
+              </a>
               <AiCadRailButton
                 active={
                   !isHistoryPanelCollapsed && activeLeftPanelView === "project"
@@ -4517,6 +4475,23 @@ export function AiCadWorkbench() {
               </div>
             </div>
 
+            {(workspaceSyncError || workspaceOperationError) && (
+              <div className="border-[#e6e0d3] border-b bg-[#fffaf0] px-4 py-2">
+                <div className="flex flex-wrap gap-3 text-xs leading-5">
+                  {workspaceSyncError ? (
+                    <p className="text-rose-700">
+                      云端同步提示：{workspaceSyncError}
+                    </p>
+                  ) : null}
+                  {workspaceOperationError ? (
+                    <p className="text-amber-700">
+                      工作台提示：{workspaceOperationError}
+                    </p>
+                  ) : null}
+                </div>
+              </div>
+            )}
+
             <div className="min-h-0 flex-1 overflow-hidden bg-white">
               <PanelGroup
                 autoSaveId={`ai-cad-panel-layout:${panelDirection}`}