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/app/leaderboard/page.tsx

@@ -26,6 +26,7 @@ import {
 import { getMeCached, getPublicSettingsCached } from "@/lib/serverData";
 import { authCookieHeader } from "@/lib/cookies";
 import { requestCanonical } from "@/lib/canonicalMeta";
+import { userPath, leaderboardPath, type UrlStyle } from "@/lib/urlStyle";
 import Avatar from "@/components/Avatar";
 import LevelBadge from "@/components/LevelBadge";
 
@@ -55,12 +56,13 @@ function normMetric(v?: string): LeaderboardMetric {
 }
 
 /** 榜单链接：默认参数省略，保持 URL 干净 */
-function lbHref(period: LeaderboardPeriod, metric: LeaderboardMetric): string {
+function lbHref(urlStyle: UrlStyle, period: LeaderboardPeriod, metric: LeaderboardMetric): string {
   const q = new URLSearchParams();
   if (period !== "all") q.set("period", period);
   if (metric !== "all") q.set("metric", metric);
   const s = q.toString();
-  return s ? `/leaderboard?${s}` : "/leaderboard";
+  const base = leaderboardPath(urlStyle);
+  return s ? `${base}?${s}` : base;
 }
 
 /** 右侧分数标签：总榜-全部=累计积分，周/月-全部=贡献值，细分=对应指标名 */
@@ -75,7 +77,7 @@ export async function generateMetadata({ searchParams }: PageProps): Promise<Met
   return {
     title: "排行榜",
     description: settings.site_description,
-    ...(await requestCanonical("/leaderboard")),
+    ...(await requestCanonical(leaderboardPath(settings.url_style))),
   };
 }
 
@@ -116,17 +118,18 @@ function RankMedal({ place }: { place: 1 | 2 | 3 }) {
 }
 
 /** 领奖台卡片：渐变金属环头像 + 名字/等级 + 分数大数字 */
-function PodiumCard({ e, place, period, metric }: {
+function PodiumCard({ e, place, period, metric, urlStyle }: {
   e: LeaderboardEntry;
   place: 1 | 2 | 3;
   period: LeaderboardPeriod;
   metric: LeaderboardMetric;
+  urlStyle: UrlStyle;
 }) {
   const m = METAL[place];
   const first = place === 1;
   return (
     <Link
-      href={`/u/${e.id}`}
+      href={userPath(urlStyle, e.id)}
       className={`group relative flex flex-col items-center text-center rounded-[22px] transition-transform hover:-translate-y-0.5 ${
         first ? "pt-7 pb-6 px-3 sm:px-5" : "pt-6 pb-5 px-2 sm:px-4"
       }`}
@@ -185,14 +188,15 @@ function PodiumCard({ e, place, period, metric }: {
 }
 
 /** 4 名起的列表行 */
-function RankRow({ e, period, metric }: {
+function RankRow({ e, period, metric, urlStyle }: {
   e: LeaderboardEntry;
   period: LeaderboardPeriod;
   metric: LeaderboardMetric;
+  urlStyle: UrlStyle;
 }) {
   return (
     <Link
-      href={`/u/${e.id}`}
+      href={userPath(urlStyle, e.id)}
       className="group flex items-center gap-3 sm:gap-4 px-4 sm:px-5 py-3.5 transition-colors hover:bg-[var(--panel-2)]"
       style={{ borderTop: "1px solid var(--line)" }}
     >
@@ -419,6 +423,7 @@ export default async function LeaderboardPage({ searchParams }: PageProps) {
   const metric = normMetric(sp.metric);
   const cookie = authCookieHeader(await cookies());
   const settings = await getPublicSettingsCached();
+  const urlStyle = settings.url_style;
   const [meUser] = await Promise.all([getMeCached(cookie || undefined)]);
   const authed = !!meUser;
 
@@ -506,7 +511,7 @@ export default async function LeaderboardPage({ searchParams }: PageProps) {
             {PERIODS.map((p) => (
               <Link
                 key={p.key}
-                href={lbHref(p.key, metric)}
+                href={lbHref(urlStyle, p.key, metric)}
                 className="px-5 sm:px-6 py-2 rounded-full text-[14px] font-semibold transition-colors"
                 style={
                   period === p.key
@@ -529,7 +534,7 @@ export default async function LeaderboardPage({ searchParams }: PageProps) {
               return (
                 <Link
                   key={m.key}
-                  href={lbHref(period, m.key)}
+                  href={lbHref(urlStyle, period, m.key)}
                   className="px-3 py-1.5 rounded-full text-[12.5px] font-medium transition-colors"
                   style={
                     active
@@ -571,15 +576,15 @@ export default async function LeaderboardPage({ searchParams }: PageProps) {
           <>
             {/* 领奖台：DOM 顺序 2-1-3，冠军居中放大 */}
             <div className="mt-7 grid grid-cols-3 gap-2.5 sm:gap-4 items-start">
-              {podium[1] && <PodiumCard e={podium[1]} place={2} period={period} metric={metric} />}
-              {podium[0] && <PodiumCard e={podium[0]} place={1} period={period} metric={metric} />}
-              {podium[2] && <PodiumCard e={podium[2]} place={3} period={period} metric={metric} />}
+              {podium[1] && <PodiumCard e={podium[1]} place={2} period={period} metric={metric} urlStyle={urlStyle} />}
+              {podium[0] && <PodiumCard e={podium[0]} place={1} period={period} metric={metric} urlStyle={urlStyle} />}
+              {podium[2] && <PodiumCard e={podium[2]} place={3} period={period} metric={metric} urlStyle={urlStyle} />}
             </div>
 
             {rest.length > 0 && (
               <div className="panel overflow-hidden mt-4">
                 {rest.map((e) => (
-                  <RankRow key={e.id} e={e} period={period} metric={metric} />
+                  <RankRow key={e.id} e={e} period={period} metric={metric} urlStyle={urlStyle} />
                 ))}
               </div>
             )}