fix(web): isomorphic-dompurify → sanitize-html に変更 (Workers SSR 互換)

isomorphic-dompurify は jsdom に依存しており Cloudflare Workers の
SSR 環境で動作しない。DOM 不要な sanitize-html に切り替え。

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

Author: Sora4431

apps/web/package.json

@@ -18,8 +18,8 @@
   "dependencies": {
     "@googlemaps/js-api-loader": "^2.0.2",
     "@tabitabi/types": "workspace:*",
-    "isomorphic-dompurify": "^3.8.0",
-    "mapbox-gl": "^3.17.0"
+    "mapbox-gl": "^3.17.0",
+    "sanitize-html": "^2.17.2"
   },
   "devDependencies": {
     "@cloudflare/workers-types": "^4.20250110.0",

apps/web/src/lib/themes/standard-seasons/shared/utils/markdown.ts

@@ -1,5 +1,5 @@
 import { marked } from "marked";
-import DOMPurify from "isomorphic-dompurify";
+import sanitizeHtml from "sanitize-html";
 import { getMemoText } from "$lib/memo";
 
 marked.setOptions({
@@ -11,5 +11,5 @@ export function renderMarkdown(memoOrNotes: string | null | undefined): string {
   const text = getMemoText(memoOrNotes);
   if (!text) return '';
   const raw = marked.parse(text, { async: false }) as string;
-  return DOMPurify.sanitize(raw);
+  return sanitizeHtml(raw);
 }