feat(nuldoc): improve error handling when a tag is undefined

1 files changed, 2 insertions, 3 deletions

diff --git a/nuldoc-src/pages/tag.ts b/nuldoc-src/pages/tag.ts
index cb60d21..f501cb3 100644
--- a/nuldoc-src/pages/tag.ts
+++ b/nuldoc-src/pages/tag.ts
@@ -3,7 +3,7 @@ import { globalHeader } from "../components/global_header.ts";
 import { pageLayout } from "../components/page_layout.ts";
 import { postPageEntry } from "../components/post_page_entry.ts";
 import { slidePageEntry } from "../components/slide_page_entry.ts";
-import { Config } from "../config.ts";
+import { Config, getTagLabel } from "../config.ts";
 import { el, text } from "../dom.ts";
 import { Page } from "../page.ts";
 import { getPostCreatedDate } from "./post.ts";
@@ -19,8 +19,7 @@ export async function generateTagPage(
   pages: TaggedPage[],
   config: Config,
 ): Promise<TagPage> {
-  const tagLabel =
-    (config.blog.tagLabels as { [key: string]: string })[tagSlug];
+  const tagLabel = getTagLabel(config, tagSlug);
   const pageTitle = `タグ「${tagLabel}」一覧`;
 
   const body = el(