fix: move Code return navigation into the chat sidebar

src/components/layout/Sidebar.tsx

@@ -133,6 +133,7 @@ export function Sidebar({
   const isProgrammingModule = activeModule === 'programming';
   const isPaintingModule = activeModule === 'painting';
   const isRobotModule = activeModule === 'robot';
+  const isProjectConfigPage = location.pathname === '/project-config' || location.pathname.startsWith('/project-config/');
   const visibleProjects = projects;
   const selectedProjectFolderName = getFolderName(newProjectSelectedPath);
   const accountName = userProfile?.displayName?.trim() || getAuthUserDisplayName(authUser) || '未登录用户';
@@ -403,7 +404,7 @@ export function Sidebar({
       )}
     >
       {workspaceLayout && !sidebarPinnedCollapsed && <ClassroomSidebarResizer />}
-      <div
+      {!isProjectConfigPage && <div
         className={cn(
           'bg-transparent px-3 text-foreground',
           isPaintingModule && !sidebarCollapsed ? 'pb-2 pt-10' : 'py-2',
@@ -411,12 +412,13 @@ export function Sidebar({
         )}
       >
         <div className="min-w-0 w-full">
-          {workspaceLayout ? <button type="button" aria-label="返回首页" title="返回首页" onClick={() => navigate('/module-select')} className="classroom-brand flex w-full items-center gap-2 rounded-lg text-left">
+          {workspaceLayout && <button type="button" aria-label="返回首页" title="返回首页" onClick={() => navigate('/module-select')} className="classroom-brand flex w-full items-center gap-2 rounded-lg text-left">
             <span className="classroom-brand-mark"><img src={classroomMark} alt="" className="h-7 w-7" /></span>
             <span className="min-w-0"><span className="block text-base font-semibold tracking-tight">麦洛</span><span className="classroom-brand-caption">把脑洞变成作品</span></span>
-          </button> : <ModuleSwitcher sidebarCollapsed={sidebarCollapsed} compact={!sidebarCollapsed} />}
+          </button>}
+          <ModuleSwitcher sidebarCollapsed={sidebarCollapsed} compact={!sidebarCollapsed} />
         </div>
-      </div>
+      </div>}
 
       <div className="classroom-sidebar-content min-h-0 flex-1 overflow-auto px-2 py-2">
         {isPaintingModule ? (