feat: 移动端底部导航可配置与工作区导航、置顶后台等前端调整

frontend/components/home/WorkspaceNav.tsx

@@ -1,14 +1,14 @@
 "use client";
 
 import Link from "next/link";
-import { useSearchParams } from "next/navigation";
+import { usePathname, useSearchParams } from "next/navigation";
 import { useCallback, useEffect, useRef, useState, type ReactNode } from "react";
-import { Bookmark, Home, LayoutGrid, Menu, ShieldCheck } from "lucide-react";
+import { Bookmark, CodeXml, Home, LayoutGrid, Menu, ShieldCheck, Trophy } from "lucide-react";
 import type { BoardWithCount, User } from "@/lib/api";
 import { isStaff } from "@/lib/roles";
 import BoardIcon, { boardColor } from "@/components/BoardIcon";
 import { useUrlStyle } from "@/components/SiteBrandProvider";
-import { userPath } from "@/lib/urlStyle";
+import { leaderboardPath, snippetsPath, userPath } from "@/lib/urlStyle";
 import { RailDrawerPanel, useDrawerChrome } from "@/components/MobileRailDrawers";
 
 // 首页壳内板块切换：仅替换中栏帖子流，不离开工作台
@@ -26,9 +26,16 @@ export function WorkspaceNavPanel({
   user?: User | null;
 }) {
   const params = useSearchParams();
+  const pathname = usePathname();
   const urlStyle = useUrlStyle();
   const activeBoard = Number(params.get("board")) || 0;
   const showAdmin = !!user && isStaff(user.role);
+  const snipHref = snippetsPath(urlStyle);
+  const lbHref = leaderboardPath(urlStyle);
+  // 与 Header 高亮规则一致：覆盖标准路径与伪静态（/snippet-*.html、/rank.html 等）
+  const snippetsActive =
+    !!pathname && (pathname.startsWith("/snippets") || pathname.startsWith("/snippet-"));
+  const leaderboardActive = !!pathname && (pathname === lbHref || pathname.startsWith(`${lbHref}/`));
 
   return (
     <section className="j13-module flex max-h-[var(--rail-max-h)] flex-col overflow-hidden" aria-label="板块目录">
@@ -49,6 +56,37 @@ export function WorkspaceNavPanel({
           <span className="j13-bcard-name flex-1 truncate">全部讨论</span>
         </Link>
 
+        {/* 不进底栏的全局入口：仅移动端展示（首页 ☰ 导航抽屉是其在移动端的唯一路径），
+            桌面端由顶部导航承担，左栏不重复 */}
+        <Link
+          href={snipHref}
+          className="j13-bcard lg:hidden"
+          aria-current={snippetsActive ? "page" : undefined}
+        >
+          <span
+            className="j13-bcard-ico"
+            style={{ background: "var(--accent-soft)", color: "var(--accent)" }}
+            aria-hidden="true"
+          >
+            <CodeXml size={15} />
+          </span>
+          <span className="j13-bcard-name flex-1 truncate">代码片段</span>
+        </Link>
+        <Link
+          href={lbHref}
+          className="j13-bcard lg:hidden"
+          aria-current={leaderboardActive ? "page" : undefined}
+        >
+          <span
+            className="j13-bcard-ico"
+            style={{ background: "var(--accent-soft)", color: "var(--accent)" }}
+            aria-hidden="true"
+          >
+            <Trophy size={15} />
+          </span>
+          <span className="j13-bcard-name flex-1 truncate">排行榜</span>
+        </Link>
+
         {user ? (
           <Link href={`${userPath(urlStyle, user.id)}?tab=favorites`} className="j13-bcard">
             <span