fix: Switching language error on tabbed pages, add 404 page

src/components/MainHeader.astro

@@ -19,7 +19,7 @@ const marginBottom = {
 ---
 
 <header class="mb-10.625 lg:fixed">
-  <h1 class={`${marginBottom} text-8 c-primary font-bold font-title lg:text-9 w-75%`}>
+  <h1 class={`${marginBottom} text-8 c-primary font-bold font-title lg:text-9 w-75% lg:w-full`}>
     <!-- Fix text cropping issues during view transition on ios by adding a div tag -->
     <div
       class="box-content inline-block pr-1.25"

src/components/Widgets/LanguageSwitcher.astro

@@ -1,6 +1,6 @@
 ---
 import { getNextLangUrl, getPostNextLangUrl } from '@/i18n/path'
-import { isPostPage } from '@/utils/page'
+import { isPostPage, isTagPage } from '@/utils/page'
 
 interface Props {
   supportedLangs: string[]
@@ -9,10 +9,15 @@ interface Props {
 const { supportedLangs } = Astro.props
 const currentPath = Astro.url.pathname
 const isPost = isPostPage(currentPath)
+const isTag = isTagPage(currentPath)
 
-const nextUrl = isPost
-  ? getPostNextLangUrl(currentPath, supportedLangs)
-  : getNextLangUrl(currentPath)
+// 检查是否应使用受限的语言列表
+const useFilteredLangs = isPost || (isTag && supportedLangs.length > 0)
+
+// 根据页面类型选择合适的语言切换方式
+const nextUrl = useFilteredLangs
+  ? getPostNextLangUrl(currentPath, supportedLangs) // 只在有内容的语言间切换
+  : getNextLangUrl(currentPath) // 在所有语言间切换
 ---
 
 <a

src/pages/404.astro

@@ -0,0 +1,8 @@
+---
+import Layout from '@/layouts/Layout.astro'
+---
+
+<Layout>
+  <div class="uno-decorative-line"></div>
+    <h1 class="mt-10 text-8 font-title">404</h1>
+</Layout>

src/pages/[...tags_tag].astro

@@ -5,8 +5,6 @@ import Layout from '@/layouts/Layout.astro'
 import { getAllTags, getPostsByTag } from '@/utils/content'
 
 export async function getStaticPaths() {
-  const tags = await getAllTags()
-
   // 定义路径数组的类型
   type PathItem = {
     params: { tags_tag: string }
@@ -16,7 +14,8 @@ export async function getStaticPaths() {
   const paths: PathItem[] = []
 
   // 默认语言的标签页面 (没有语言前缀)
-  tags.forEach((tag: string) => {
+  const defaultTags = await getAllTags(defaultLocale)
+  defaultTags.forEach((tag: string) => {
     paths.push({
       params: { tags_tag: `tags/${tag}` },
       props: { tag, lang: defaultLocale },
@@ -24,16 +23,17 @@ export async function getStaticPaths() {
   })
 
   // 更多语言的标签页面 (有语言前缀)
-  allLocales.forEach((lang: string) => {
+  for (const lang of allLocales) {
     if (lang !== defaultLocale) {
-      tags.forEach((tag: string) => {
+      const langTags = await getAllTags(lang)
+      langTags.forEach((tag: string) => {
         paths.push({
           params: { tags_tag: `${lang}/tags/${tag}` },
           props: { tag, lang },
         })
       })
     }
-  })
+  }
 
   return paths
 }
@@ -42,6 +42,16 @@ const { tag, lang } = Astro.props
 const posts = await getPostsByTag(tag, lang)
 const allTags = await getAllTags(lang)
 
+// 获取当前标签在每种语言下是否有文章
+const tagSupportedLangs = await Promise.all(
+  allLocales.map(async (locale) => {
+    const postsInLang = await getPostsByTag(tag, locale)
+    return postsInLang.length > 0 ? locale : null
+  }),
+)
+// 过滤出支持当前标签的语言列表
+const supportedLangs = tagSupportedLangs.filter(Boolean) as string[]
+
 // 构建标签链接
 function getTagUrl(tagName: string): string {
   return lang === defaultLocale
@@ -50,7 +60,7 @@ function getTagUrl(tagName: string): string {
 }
 ---
 
-<Layout>
+<Layout supportedLangs={supportedLangs}>
   <div class="uno-decorative-line"></div>
   <div class="uno-tags-wrapper">
     {allTags.map(tagName => (