公开页补齐自引用 Canonical 与按类型的结构化数据，图片补上说明文字。

后台设置和内容编辑改成可导航布局；部署用访客 origin 生成 Canonical，避免落到容器地址。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/components/home/WorkspaceNav.tsx

@@ -2,8 +2,9 @@
 
 import Link from "next/link";
 import { useSearchParams } from "next/navigation";
-import { PenSquare, Home, LayoutGrid } from "lucide-react";
+import { PenSquare, Home, LayoutGrid, ShieldCheck } from "lucide-react";
 import type { BoardWithCount, User } from "@/lib/api";
+import { isStaff } from "@/lib/roles";
 
 // 首页壳内板块切换：仅替换中栏帖子流，不离开工作台
 function boardHref(id: number) {
@@ -11,9 +12,10 @@ function boardHref(id: number) {
 }
 
 // 桌面左栏：整块模块，与右栏 j13-module 对齐
-export function WorkspaceNav({ boards }: { boards: BoardWithCount[]; user?: User | null }) {
+export function WorkspaceNav({ boards, user }: { boards: BoardWithCount[]; user?: User | null }) {
   const params = useSearchParams();
   const activeBoard = Number(params.get("board")) || 0;
+  const showAdmin = !!user && isStaff(user.role);
 
   return (
     // sticky 必须挂在 flex 子项上：父级 items-start 会把内层缩成内容高，失去粘滞行程
@@ -68,6 +70,21 @@ export function WorkspaceNav({ boards }: { boards: BoardWithCount[]; user?: User
             </Link>
           ))}
         </div>
+
+        {showAdmin ? (
+          <div className="shrink-0 mt-1.5 pt-1.5" style={{ borderTop: "1px solid var(--line)" }}>
+            <Link href="/admin" className="j13-bcard">
+              <span
+                className="j13-bcard-ico"
+                style={{ background: "var(--accent-soft)", color: "var(--accent)" }}
+                aria-hidden="true"
+              >
+                <ShieldCheck size={15} />
+              </span>
+              <span className="j13-bcard-name flex-1 truncate">管理面板</span>
+            </Link>
+          </div>
+        ) : null}
       </section>
     </nav>
   );