主题功能同步：vivid 页脚补社交按钮排（含源码入口，居中）；classic 文章页补右栏目录（滚动高亮）与顶部阅读进度条——快发盒经核实两套 UI 均已存在，无需补

frontend/src/components/RightRail.vue

@@ -1,5 +1,5 @@
 <script setup>
-import { computed, onMounted, ref } from 'vue'
+import { computed, nextTick, onBeforeUnmount, onMounted, ref, watch } from 'vue'
 import { publicApi } from '../api'
 import { site } from '../site'
 import { socialIcon } from '../socialIcons'
@@ -8,6 +8,35 @@ import { relativeDate, stripTags, thumbURL } from '../utils'
 // vivid 是单栏布局，右栏整体不渲染（省掉 latest/tags 两次请求）。
 const isVivid = computed(() => site.ui_id === 'vivid')
 
+// 文章页目录（PostView 传入 headings；空数组时不渲染这张卡）。
+// 高亮跟随滚动：视口上方最近的那个标题算「当前」。
+const props = defineProps({
+  toc: { type: Array, default: () => [] }
+})
+const activeId = ref('')
+let tocObserver = null
+
+function watchToc() {
+  if (tocObserver) tocObserver.disconnect()
+  if (!props.toc.length) return
+  tocObserver = new IntersectionObserver(
+    (entries) => {
+      for (const e of entries) {
+        if (e.isIntersecting) activeId.value = e.target.id
+      }
+    },
+    { rootMargin: '0px 0px -65% 0px' }
+  )
+  nextTick(() => {
+    for (const t of props.toc) {
+      const el = document.getElementById(t.id)
+      if (el) tocObserver.observe(el)
+    }
+  })
+}
+watch(() => props.toc, watchToc, { deep: false })
+onBeforeUnmount(() => tocObserver && tocObserver.disconnect())
+
 // 项目源码仓库是固定入口（本站 git remote），不来自后台配置 —— 和版权一样
 // 固定渲染在自己的那排；后台填的社交账号单独一排，URL 撞车的去重。
 const PROJECT_REPO = 'https://git.gopher.ink/mirrors2/ONE'
@@ -62,6 +91,15 @@ onMounted(async () => {
 
 <template>
   <aside v-if="!isVivid" class="rail-right">
+    <section v-if="toc.length" class="card toc-card">
+      <p class="eyebrow">目录</p>
+      <ul class="toc-list">
+        <li v-for="t in toc" :key="t.id" :class="{ h3: t.level >= 3, on: activeId === t.id }">
+          <a :href="'#' + t.id" :class="{ on: activeId === t.id }">{{ t.text }}</a>
+        </li>
+      </ul>
+    </section>
+
     <section class="card">
       <p class="eyebrow">关于这里</p>
       <p class="bio">{{ site.author_bio || site.site_desc }}</p>
@@ -174,6 +212,24 @@ onMounted(async () => {
   color: var(--accent);
 }
 
+/* 文章目录：当前小节高亮，层级缩进 */
+.toc-list {
+  list-style: none;
+  margin: 8px 0 0;
+  padding: 0;
+  font-size: 13px;
+  line-height: 1.6;
+}
+.toc-list li {margin: 2px 0;
+  border-left: 2px solid transparent;
+  padding-left: 8px;}
+.toc-list li.h3 {padding-left: 20px;
+  font-size: 12.5px;}
+.toc-list li.on {border-left-color: var(--accent);}
+.toc-list a {color: var(--muted);
+  text-decoration: none;}
+.toc-list li.on a, .toc-list a:hover {color: var(--accent);}
+
 .list {
   list-style: none;
   margin: 8px 0 0;

frontend/src/styles.css

@@ -1451,3 +1451,14 @@ a.cm-name-a:hover {color: var(--accent);}
    比例存进 markdown 的 alt）。默认半透明让访客知道它在那儿。 */
 .admin-shell .image-resize-handle {opacity: 0.45;}
 .admin-shell .image-wrapper:hover .image-resize-handle {opacity: 1;}
+
+/* classic 文章页阅读进度条：视口顶部细线，vivid 的同款能力 */
+.reading-bar {position: fixed;
+  top: 0;
+  left: 0;
+  height: 2px;
+  width: 0;
+  background: var(--accent);
+  z-index: 60;
+  transition: width .1s linear;
+  pointer-events: none;}

frontend/src/ui/yohaku/YohakuFoot.vue

@@ -1,6 +1,12 @@
 <script setup>
 import { RouterLink } from 'vue-router'
 import { site } from '../../site'
+import { socialIcon } from '../../socialIcons'
+
+// 社交按钮与 classic 页脚同源：后台「社交链接」+ 固定源码仓库入口
+const PROJECT_REPO = 'https://git.gopher.ink/mirrors2/ONE'
+const social = (site.social_links || []).concat([{ label: '源码', url: PROJECT_REPO }])
+  .filter((s) => s && s.url)
 
 // 余白页脚。对应设计稿的 <footer class="foot">。
 //
@@ -21,6 +27,20 @@ const links = [
 <template>
   <footer class="foot">
     <div class="quote">What&rsquo;s left unsaid holds the most weight.</div>
+    <div v-if="social.length" class="foot-social">
+      <a
+        v-for="s in social"
+        :key="s.label + s.url"
+        :href="s.url"
+        :title="s.label"
+        :aria-label="s.label"
+        :target="s.url.startsWith('http') ? '_blank' : undefined"
+        :rel="s.url.startsWith('http') ? 'noopener' : undefined"
+      >
+        <svg v-if="socialIcon(s.url)" viewBox="0 0 24 24" aria-hidden="true"><path :d="socialIcon(s.url)" /></svg>
+        <span v-else>{{ s.label }}</span>
+      </a>
+    </div>
     <div>{{ site.footer_note }}<template v-if="site.icp"> · {{ site.icp }}</template></div>
     <div class="foot-nav">
       <template v-for="(l, i) in links" :key="l.to">

frontend/src/ui/yohaku/chrome.css

@@ -169,6 +169,15 @@ html[data-ui='vivid'] .foot {max-width:1100px;margin:40px auto 0;padding:28px 28
   border-top:1px solid var(--line);
   text-align:center;color:var(--muted);font-size:12.5px;line-height:2;}
 html[data-ui='vivid'] .foot a {color:var(--accent);font-weight:600;transition:opacity .25s}
+/* 页脚社交排：图标居中一行，与 classic 页脚同步 */
+html[data-ui='vivid'] .foot-social {display:flex;justify-content:center;align-items:center;
+  gap:18px;margin:14px 0 18px;}
+html[data-ui='vivid'] .foot-social a {color:var(--soft);font-weight:400;
+  display:inline-flex;align-items:center;justify-content:center;
+  width:30px;height:30px;border-radius:8px;transition:color .25s,background .25s;}
+html[data-ui='vivid'] .foot-social a:hover {color:var(--accent);background:var(--accent-soft);}
+html[data-ui='vivid'] .foot-social svg {width:17px;height:17px;fill:currentColor;}
+html[data-ui='vivid'] .foot-social span {font-size:12px;}
 @media (hover: hover) and (pointer: fine) {
   html[data-ui='vivid'] .foot a:hover {opacity:.75}
 }

frontend/src/views/PostView.vue

@@ -1,5 +1,5 @@
 <script setup>
-import { computed, onMounted, ref, watch } from 'vue'
+import { computed, onBeforeUnmount, onMounted, ref, watch } from 'vue'
 import { useRoute } from 'vue-router'
 import LeftNav from '../components/LeftNav.vue'
 import RightRail from '../components/RightRail.vue'
@@ -33,6 +33,14 @@ function withHeadingIds(html) {
 const contentHtml = ref('')
 const headings = ref([])
 
+// 顶部阅读进度条（classic）：滚动过正文才算数，短文太短不显示
+const progress = ref(0)
+function onScroll() {
+  const doc = document.documentElement
+  const total = doc.scrollHeight - window.innerHeight
+  progress.value = total > 300 ? Math.min(100, (window.scrollY / total) * 100) : 0
+}
+
 async function load() {
   loading.value = true
   error.value = ''
@@ -52,7 +60,11 @@ async function load() {
   }
 }
 
-onMounted(load)
+onMounted(() => {
+  load()
+  window.addEventListener('scroll', onScroll, { passive: true })
+})
+onBeforeUnmount(() => window.removeEventListener('scroll', onScroll))
 watch(() => route.params.slug, load)
 
 const isShort = computed(() => post.value && post.value.kind === 'short')
@@ -71,6 +83,8 @@ const initial = computed(() => (site.author_name || 'O').trim().slice(0, 1).toUp
   />
 
   <div v-else class="shell">
+    <!-- 阅读进度：贴在视口顶部的细线 -->
+    <div class="reading-bar" :style="{ width: progress + '%' }" aria-hidden="true"></div>
     <div class="layout">
       <!-- LeftNav / RightRail 之前 import 了却没渲染，导致整页掉进 236px 的左列。
            补上，和 HomeView 的三栏一致。 -->
@@ -146,7 +160,7 @@ const initial = computed(() => (site.author_name || 'O').trim().slice(0, 1).toUp
         <!-- 评论区（和 vivid 共用同一个组件，见 components/comments/） -->
         <CommentSection v-if="post" :post-id="post.id" />
       </main>
-      <RightRail />
+      <RightRail :toc="isShort ? [] : headings" />
     </div>
   </div>
 </template>