fix: group sidebar navigation separately from personal projects

src/components/layout/Sidebar.tsx

@@ -409,6 +409,7 @@ export function Sidebar({
       {!isProjectConfigPage && <div
         className={cn(
           'bg-transparent px-3 text-foreground',
+          workspaceLayout && 'classroom-sidebar-header',
           isPaintingModule && !sidebarCollapsed ? 'pb-2 pt-10' : 'py-2',
           sidebarCollapsed && 'px-2',
         )}
@@ -430,6 +431,7 @@ export function Sidebar({
               className="no-drag motion-press flex h-8 w-8 shrink-0 items-center justify-center rounded-md text-muted-foreground hover:bg-surface-subtle hover:text-foreground"
             ><PanelLeftClose className="h-4 w-4" /></button>}
           </div>}
+          {workspaceLayout && <CommunityLink variant="sidebar" collapsed={sidebarCollapsed} />}
           {!workspaceLayout && <ModuleSwitcher sidebarCollapsed={sidebarCollapsed} compact={!sidebarCollapsed} />}
         </div>
       </div>}
@@ -452,7 +454,7 @@ export function Sidebar({
           <Plus className="h-4 w-4 shrink-0 text-brand" />
           {!sidebarCollapsed && '新建项目'}
         </button>
-        <CommunityLink variant="sidebar" collapsed={sidebarCollapsed} />
+        {!workspaceLayout && <CommunityLink variant="sidebar" collapsed={sidebarCollapsed} />}
         <div className="classroom-projects mt-3">
           <button
             type="button"