fix: use getTagSlug() for tag links to prevent empty tag pages

Tags containing both spaces and dashes (e.g. "Writings - 創作") produced
mismatched slugs: inline generation created "writings---創作" while
getTagSlug() collapsed dashes to "writings-創作", causing tag pages to
show no articles.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/commands/new-post.md

@@ -50,14 +50,19 @@ Ask the user if they want to preview with `npm run dev` before publishing.
 
 ## Step 5: Publish
 
-Execute the two-step deployment:
+**IMPORTANT**: The `.gitmodules` URL for `content/` points to GitHub. The CI/CD server clones the submodule from that URL, so the content submodule **must be pushed to GitHub first** before pushing the main repo. Otherwise the server will check out stale content and posts will disappear from the site.
+
+Execute the deployment in order:
 
 ```bash
-# 1. Commit and push content submodule
-git -C content add . && git -C content commit -m "Add new post: <title>" && git -C content push
+# 1. Commit content submodule
+git -C content add . && git -C content commit -m "Add new post: <title>"
 
-# 2. Update main repo submodule pointer and push (triggers CI/CD)
-git add content && git commit -m "Update content submodule" && git push
+# 2. Push content submodule to ALL remotes (GitHub first — CI/CD depends on it)
+git -C content push github main && git -C content push origin main
+
+# 3. Update main repo submodule pointer, commit, and push to both remotes
+git add content && git commit -m "Update content submodule" && git push origin main && git push github main
 ```
 
-Confirm both pushes succeeded. The CI/CD pipeline on git.gbanyan.net will handle deployment automatically (and crontab mirrors to gitea.gbanyan.net).
+Confirm all pushes succeeded. The CI/CD pipeline on git.gbanyan.net will handle deployment automatically (and crontab mirrors to gitea.gbanyan.net).

app/blog/[slug]/page.tsx

@@ -3,7 +3,7 @@ import Image from 'next/image';
 import { notFound } from 'next/navigation';
 import type { Metadata } from 'next';
 import { allPosts } from 'contentlayer2/generated';
-import { getPostBySlug, getRelatedPosts, getPostNeighbors } from '@/lib/posts';
+import { getPostBySlug, getRelatedPosts, getPostNeighbors, getTagSlug } from '@/lib/posts';
 import { siteConfig } from '@/lib/config';
 import { ReadingProgress } from '@/components/reading-progress';
 import { ScrollReveal } from '@/components/scroll-reveal';
@@ -217,9 +217,7 @@ export default async function BlogPostPage({ params }: Props) {
                     {post.tags.map((t) => (
                       <Link
                         key={t}
-                        href={`/tags/${encodeURIComponent(
-                          t.toLowerCase().replace(/\s+/g, '-')
-                        )}`}
+                        href={`/tags/${encodeURIComponent(getTagSlug(t))}`}
                         className="tag-chip rounded-full bg-accent-soft px-3 py-1 text-sm text-accent-textLight dark:bg-slate-800 dark:text-slate-100 dark:hover:bg-slate-700 dark:hover:text-white"
                       >
                         #{t}

app/pages/[slug]/page.tsx

@@ -3,7 +3,7 @@ import Image from 'next/image';
 import { notFound } from 'next/navigation';
 import type { Metadata } from 'next';
 import { allPages } from 'contentlayer2/generated';
-import { getPageBySlug } from '@/lib/posts';
+import { getPageBySlug, getTagSlug } from '@/lib/posts';
 import { siteConfig } from '@/lib/config';
 import { ReadingProgress } from '@/components/reading-progress';
 import { PostLayout } from '@/components/post-layout';
@@ -130,9 +130,7 @@ export default async function StaticPage({ params }: Props) {
                     {page.tags.map((t) => (
                       <Link
                         key={t}
-                        href={`/tags/${encodeURIComponent(
-                          t.toLowerCase().replace(/\s+/g, '-')
-                        )}`}
+                        href={`/tags/${encodeURIComponent(getTagSlug(t))}`}
                         className="tag-chip rounded-full bg-accent-soft px-3 py-1 text-sm text-accent-textLight dark:bg-slate-800 dark:text-slate-100"
                       >
                         #{t}

app/sitemap.ts

@@ -1,5 +1,6 @@
 import { MetadataRoute } from 'next';
 import { allPosts, allPages } from 'contentlayer2/generated';
+import { getTagSlug } from '@/lib/posts';
 
 export default function sitemap(): MetadataRoute.Sitemap {
   const siteUrl = process.env.NEXT_PUBLIC_SITE_URL || 'http://localhost:3000';
@@ -58,7 +59,7 @@ export default function sitemap(): MetadataRoute.Sitemap {
   );
 
   const tagPages = allTags.map((tag) => ({
-    url: `${siteUrl}/tags/${encodeURIComponent(tag.toLowerCase().replace(/\s+/g, '-'))}`,
+    url: `${siteUrl}/tags/${encodeURIComponent(getTagSlug(tag))}`,
     lastModified: new Date(),
     changeFrequency: 'weekly' as const,
     priority: 0.5,

next-env.d.ts

@@ -1,6 +1,6 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-import "./.next/dev/types/routes.d.ts";
+import "./.next/types/routes.d.ts";
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/app/api-reference/config/typescript for more information.