feat: 可配置站点 URL 风格

- 新增 urlStyle 工具与测试：postPath/userPath/sitePagePath 统一生成链接
- 管理端新增 UrlStylePanel 设置面板，settings 服务与 handler 适配
- 全站路由链接与 JSON-LD/sitemap 切换为统一 URL 生成
- middleware 与相关组件适配

frontend/components/markdown/MdHideBlock.tsx

@@ -9,6 +9,8 @@ import { apiUnlockPost, apiUnlockPostPassword } from "@/lib/api";
 import { CSRF_COOKIE } from "@/lib/cookies";
 import { toast } from "@/lib/toast";
 import { hideKindLabel, type HideKind } from "@/lib/hideBlocks";
+import { postPath } from "@/lib/urlStyle";
+import { useUrlStyle } from "@/components/SiteBrandProvider";
 
 /** 若浏览器尚无 CSRF cookie，请求公开接口以触发后端签发 */
 async function ensureGuestCSRF() {
@@ -44,6 +46,7 @@ export default function MdHideBlock({
   children,
 }: MdHideBlockProps) {
   const router = useRouter();
+  const urlStyle = useUrlStyle();
   const pwdErrId = useId();
   const [busy, setBusy] = useState(false);
   const [pwd, setPwd] = useState("");
@@ -51,7 +54,9 @@ export default function MdHideBlock({
   const label = hideKindLabel(kind);
   const loginTo =
     loginHref ||
-    (postId ? `/login?redirect=${encodeURIComponent(`/post/${postId}`)}` : "/login");
+    (postId
+      ? `/login?redirect=${encodeURIComponent(postPath(urlStyle, postId))}`
+      : "/login");
 
   if (locked) {
     const unlockPoints = async () => {
@@ -145,7 +150,7 @@ export default function MdHideBlock({
             <Link
               href={
                 postId
-                  ? `/login?redirect=${encodeURIComponent(`/post/${postId}#comment-input`)}`
+                  ? `/login?redirect=${encodeURIComponent(`${postPath(urlStyle, postId)}#comment-input`)}`
                   : loginTo
               }
               className="btn btn-primary"