* fix(frontend): resolve invalid HTML nesting and tabnabbing vulnerabilities
Fix `<button>` inside `<a>` invalid HTML in artifact components and add
missing `noopener,noreferrer` to `window.open` calls to prevent reverse
tabnabbing.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix(frontend): address Copilot review on tabnabbing and double-tab-open
Remove redundant parent onClick on web_fetch ChainOfThoughtStep to
prevent opening two tabs on link click, and explicitly null out
window.opener after window.open() for defensive tabnabbing hardening.
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
* fix(frontend): add missing rel="noopener noreferrer" to target="_blank" links
Prevent tabnabbing attacks and referrer leakage by ensuring all
external links with target="_blank" include both noopener and
noreferrer in the rel attribute.
Made-with: Cursor
* style: fix code formatting
Add POST /api/skills/install endpoint to install .skill files from
thread's user-data directory. The endpoint extracts the ZIP archive,
validates SKILL.md frontmatter, and installs to skills/custom/.
Frontend Install buttons now call the API instead of downloading.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
yangzheli