GHSA-wwp2-x4rj-j8rm

### Summary Rich text cell content rendered via `v-html` without sanitization, enabling stored XSS. ### Details Rich text in `TextArea.vue` was parsed by markdown-it with `html: true` and injected via `v-html` without DOMPurify. A user with Editor role can inject arbitrary HTML that executes for all viewers. ### Impact Stored XSS — malicious scripts execute for any user viewing the cell. ### Credit This issue was discovered by an AI agent developed by the GitHub Security Lab and reviewed by GHSL team members [@p-](https://github.com/p-) (Peter Stockli) and [@m-y-mo](https://github.com/m-y-mo) (Man Yue Mo).