From 94d62f810a5748b6dececf7b78561a242e084da2 Mon Sep 17 00:00:00 2001
From: Elian Doran <contact@eliandoran.me>
Date: Thu, 23 Oct 2025 14:06:13 +0300
Subject: [PATCH] fix(share): heading and navigation not supporting CJK (closes
 #6430)

---
 apps/server/src/services/utils.ts               | 8 ++++++++
 apps/server/src/share/routes.ts                 | 5 +++--
 packages/share-theme/src/templates/page.ejs     | 1 -
 packages/share-theme/src/templates/toc_item.ejs | 1 -
 4 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/apps/server/src/services/utils.ts b/apps/server/src/services/utils.ts
index ca6b809bb..75d6b564c 100644
--- a/apps/server/src/services/utils.ts
+++ b/apps/server/src/services/utils.ts
@@ -497,6 +497,14 @@ export function formatSize(size: number | null | undefined) {
     }
 }
 
+export function slugify(text: string) {
+    return text
+        .normalize("NFKD") // handles accents like é → e
+        .toLowerCase()
+        .replace(/[^\p{Letter}\p{Number}]+/gu, "-") // keep Unicode letters/numbers
+        .replace(/(^-|-$)+/g, ""); // trim leading/trailing dashes
+}
+
 export default {
     compareVersions,
     crash,
diff --git a/apps/server/src/share/routes.ts b/apps/server/src/share/routes.ts
index 37162ea28..f8bce49b0 100644
--- a/apps/server/src/share/routes.ts
+++ b/apps/server/src/share/routes.ts
@@ -14,7 +14,7 @@ import log from "../services/log.js";
 import type SNote from "./shaca/entities/snote.js";
 import type SBranch from "./shaca/entities/sbranch.js";
 import type SAttachment from "./shaca/entities/sattachment.js";
-import utils, { isDev, safeExtractMessageAndStackFromError } from "../services/utils.js";
+import utils, { isDev, safeExtractMessageAndStackFromError, slugify } from "../services/utils.js";
 import options from "../services/options.js";
 import { t } from "i18next";
 import ejs from "ejs";
@@ -175,7 +175,8 @@ function register(router: Router) {
             appPath: isDev ? appPath : `../${appPath}`,
             showLoginInShareTheme,
             t,
-            isDev
+            isDev,
+            slugify
         };
         let useDefaultView = true;
 
diff --git a/packages/share-theme/src/templates/page.ejs b/packages/share-theme/src/templates/page.ejs
index cc96cc4ca..0a227a32c 100644
--- a/packages/share-theme/src/templates/page.ejs
+++ b/packages/share-theme/src/templates/page.ejs
@@ -90,7 +90,6 @@ const currentTheme = note.getLabel("shareTheme") === "light" ? "light" : "dark";
 const themeClass = currentTheme === "light" ? " theme-light" : " theme-dark";
 const headingRe = /(<h[1-6]>)(.+?)(<\/h[1-6]>)/g;
 const headingMatches = [...content.matchAll(headingRe)];
-const slugify = (text) => text.toLowerCase().replace(/[^\w]/g, "-");
 content = content.replaceAll(headingRe, (...match) => {
     match[0] = match[0].replace(match[3], `<a id="${slugify(match[2])}" class="toc-anchor" name="${slugify(match[2])}" href="#${slugify(match[2])}">#</a>${match[3]}`);
     return match[0];
diff --git a/packages/share-theme/src/templates/toc_item.ejs b/packages/share-theme/src/templates/toc_item.ejs
index b18b4a1a6..726ca4cca 100644
--- a/packages/share-theme/src/templates/toc_item.ejs
+++ b/packages/share-theme/src/templates/toc_item.ejs
@@ -1,5 +1,4 @@
 <%
-const slugify = (text) => text.toLowerCase().replace(/[^\w]/g, "-");
 const slug = slugify(entry.name);
 %>