fix(media): 详情页路径全量+prev/next 滤 hidden（op-artalk 车道指正）

- getStaticPaths 恢复只滤 draft：hidden 样张需出静态页（可访问不列出）
- prev/next 从 hidden 过滤后的导航数组取位：真实文章上下篇不链样张

验证: build 23 页；media-sample zh/en 双页产物在；/media/ 绝对引用 ✓；
      首页与 RSS 零 media-sample 泄漏

Spec: 2026-10-25_add-media-and-polish

Co-authored-by: GLM-5.3

src/pages/archives/[...slug].astro

@@ -7,13 +7,23 @@ import { trackOf } from '../../content.config';
 
 // URL = /archives/{slug}，slug 即文件名，与 Halo 旧结构 1:1（不可改）
 export async function getStaticPaths() {
-  const posts = (await getCollection('posts', ({ data }) => !data.draft && !data.tags.includes('hidden'))).sort(
+  // 路径用全量（hidden 样张也要出静态页）；prev/next 导航滤 hidden
+  // （真实文章的上下篇不链向样张——op-artalk 车道连带提醒的实现）
+  const all = (await getCollection('posts', ({ data }) => !data.draft)).sort(
     (a, b) => b.data.pubDate.getTime() - a.data.pubDate.getTime(),
   );
-  return posts.map((entry, i) => ({
+  const nav = all.filter(({ data }) => !data.tags.includes('hidden'));
+  return all.map((entry) => {
+    const i = nav.findIndex((e) => e.id === entry.id);
+    return {
       params: { slug: entry.id },
-    props: { entry, prev: posts[i + 1] ?? null, next: posts[i - 1] ?? null },
+      props: {
-  }));
+        entry,
+        prev: i >= 0 ? (nav[i + 1] ?? null) : null,
+        next: i > 0 ? (nav[i - 1] ?? null) : null,
+      },
+    };
+  });
 }
 
 interface Props {

src/pages/en/archives/[...slug].astro

@@ -8,14 +8,24 @@ import AiTranslatedBadge from '../../../components/AiTranslatedBadge.astro';
 import { t } from '../../../i18n/ui';
 
 export async function getStaticPaths() {
-  const zh = (await getCollection('posts', ({ data }) => !data.draft && !data.tags.includes('hidden'))).sort(
+  // 路径全量（hidden 样张出页）；prev/next 滤 hidden（同 zh 轨修正）
+  const all = (await getCollection('posts', ({ data }) => !data.draft)).sort(
     (a, b) => b.data.pubDate.getTime() - a.data.pubDate.getTime(),
   );
+  const nav = all.filter(({ data }) => !data.tags.includes('hidden'));
   const en = new Map((await getCollection('postsEn')).map((e) => [e.id, e]));
-  return zh.map((entry, i) => ({
+  return all.map((entry) => {
+    const i = nav.findIndex((e) => e.id === entry.id);
+    return {
       params: { slug: entry.id },
-    props: { entry, enEntry: en.get(entry.id) ?? null, prev: zh[i + 1] ?? null, next: zh[i - 1] ?? null },
+      props: {
-  }));
+        entry,
+        enEntry: en.get(entry.id) ?? null,
+        prev: i >= 0 ? (nav[i + 1] ?? null) : null,
+        next: i > 0 ? (nav[i - 1] ?? null) : null,
+      },
+    };
+  });
 }
 
 interface Props {