feat: 友链/书库/移动端导航/排行榜等多模块功能

新增模块：
- 友链（friendlink）后端处理 + 前端管理页与友链板
- 书库（library）：导入、章节、封面、阅读页、横竖版自适应 AdaptiveCoverSlot
- 顶栏导航（header_nav）配置与 MobileTabBar/MobileRailDrawers 移动端抽屉
- 排行榜 service 测试、站点页面测试、时间线发布（timeline_release）

其它改动：
- 后端 handlers/services 全量小幅调整
- 前端组件、库函数、URL/品牌/站点 URL 工具更新
- Lightbox 图片、MdEntries 条目卡、coverColor 派生色相等前端能力

frontend/components/home/CommunityPanels.tsx

@@ -26,13 +26,13 @@ import type {
   SidebarPageItem,
   PublicAdItem,
   PublicSponsorItem,
+  FriendLink,
 } from "@/lib/api";
 import Avatar from "@/components/Avatar";
 import { AdText } from "@/components/AdText";
 import { getPublicSettingsCached } from "@/lib/serverData";
 import { announcementPath, postPath, userPath, pagePath } from "@/lib/urlStyle";
 import { PulseCheckin } from "./CheckinCard";
-import { FRIEND_LINKS } from "@/lib/friendLinks";
 import { formatCompact, formatShortDate } from "@/lib/format";
 import { pageGlyph } from "@/lib/pageGlyph";
 import { AboutSiteHeader } from "@/components/site-doc";
@@ -396,38 +396,53 @@ export async function ActiveUsers({ users, allowComments }: { users: ActiveUser[
 
 /* ---------- 友情链接 ---------- */
 
-export function FriendLinks() {
-  if (FRIEND_LINKS.length === 0) return null;
+export function FriendLinks({ links }: { links: FriendLink[] }) {
+  // 块显隐由侧栏布局配置控制；列表为空时仍渲染（保留「申请」入口），仅展示占位提示
   return (
     <section className="j13-module" aria-label="友情链接">
       <p className="j13-module-title mb-3">
         <Link2 size={15} style={{ color: "var(--accent)" }} /> 友情链接
-        <Link
-          href="/compose"
-          className="meta ml-auto text-[12px] font-normal transition-colors hover:text-[var(--accent)]"
-        >
-          申请
-        </Link>
+        <span className="ml-auto inline-flex items-center gap-3 text-[12px] font-normal">
+          <Link href="/links" className="meta transition-colors hover:text-[var(--accent)]">
+            全部
+          </Link>
+          <Link
+            href="/links#apply"
+            className="meta transition-colors hover:text-[var(--accent)]"
+          >
+            申请
+          </Link>
+        </span>
       </p>
-      <div className="flex flex-wrap gap-2">
-        {FRIEND_LINKS.map((l) =>
-          l.href.startsWith("http") ? (
+      {links.length === 0 ? (
+        <p className="meta text-[12.5px]">暂无友链，欢迎申请</p>
+      ) : (
+        <div className="flex flex-wrap gap-2">
+          {links.map((l) => (
             <a
-              key={l.name}
-              href={l.href}
+              key={l.id}
+              href={l.url}
               target="_blank"
               rel="noopener noreferrer"
-              className="j13-chip"
+              className="j13-chip inline-flex items-center gap-1.5"
+              title={l.description || l.name}
             >
+              {l.logo_url ? (
+                // eslint-disable-next-line @next/next/no-img-element
+                <img
+                  src={l.logo_url}
+                  alt=""
+                  width={14}
+                  height={14}
+                  className="object-contain"
+                  style={{ width: 14, height: 14 }}
+                />
+              ) : null}
               {l.name}
             </a>
-          ) : (
-            <span key={l.name} className="j13-chip" data-tip="友链待配置">
-              {l.name}
-            </span>
-          )
-        )}
-      </div>
+          ))}
+        </div>
+      )}
     </section>
   );
 }
@@ -452,6 +467,7 @@ type PanelsProps = {
   sponsors?: PublicSponsorItem[];
   sponsorsPanelTitle?: string;
   sponsorsEnabled?: boolean;
+  friendLinks?: FriendLink[];
 };
 
 export function AdsPanel({
@@ -615,6 +631,7 @@ function CommunityPanelsBody({
   sponsors = [],
   sponsorsPanelTitle = "赞助商",
   sponsorsEnabled = true,
+  friendLinks = [],
 }: PanelsProps) {
   return (
     <>
@@ -625,7 +642,7 @@ function CommunityPanelsBody({
       <HotRanking posts={hot} allowComments={allowComments} />
       <NewUsers users={newUsers} />
       <ActiveUsers users={activeUsers} allowComments={allowComments} />
-      <FriendLinks />
+      <FriendLinks links={friendLinks} />
       <AboutSite
         pages={sidebarPages}
         siteDescription={siteDescription}