Canvas Notebook 2026.6.29.1

Highlights

• Adds a mobile Markdown editor toolbar with localized compact controls and shared toolbar state.
• Improves editor loading feedback, Marp workspace requests, and mobile Markdown control spacing.
• Fixes Node 24 Next.js startup compatibility and duplicate Canvas Agent Chat user messages.
• Hardens CodeQL-covered security paths for Studio imports, email HTML conversion, link previews, browser runtime access, plugin/skill manifests, and safe paths.
• Normalizes Control Plane release webhook handling so image builds are not failed by webhook notification errors.

Verification

• npm run test:startup-runtime
• npm run build
• GitHub Actions Build and Push on main before release prep: 28403214482
• GitHub Actions Build and Push on release commit before tag: 28403656181
• GitHub Actions Build and Push on v2026.6.29.1: 28404066271