merge: integrate project settings plugin workspace

# Conflicts:
#	src/components/layout/MainLayout.tsx
#	src/pages/ProjectConfiguration/index.tsx

src/components/layout/Sidebar.tsx

@@ -12,7 +12,6 @@ import {
   FolderKanban,
   LogOut,
   Plus,
-  Puzzle,
   Settings as SettingsIcon,
   UserCircle2,
 } from 'lucide-react';
@@ -577,23 +576,6 @@ export function Sidebar({ workspaceLayout = false, sidebarPeekOpen = false, onSi
           <Plus className="h-4 w-4 shrink-0 text-brand" />
           {!sidebarCollapsed && '新建项目'}
         </button>
-        <div className="mt-3 grid gap-1">
-          <button
-            type="button"
-            data-testid="sidebar-nav-plugins"
-            aria-current={location.pathname === '/plugins' ? 'page' : undefined}
-            aria-label="插件"
-            onClick={() => navigate(activeProject ? '/plugins?scope=project' : '/plugins?scope=all')}
-            className={cn(
-              'motion-press flex min-h-10 w-full items-center gap-2 rounded-lg px-2 py-2 text-left text-sm font-medium transition-colors duration-100 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand/35',
-              location.pathname === '/plugins' ? 'bg-brand-selected text-foreground' : 'text-foreground hover:bg-surface-subtle',
-              sidebarCollapsed && 'justify-center px-0',
-            )}
-          >
-            <Puzzle className="h-4 w-4 shrink-0 text-brand" />
-            {!sidebarCollapsed ? <span>插件</span> : null}
-          </button>
-        </div>
         <div className="mt-3">
           <button
             type="button"