Canvas Notebook 2026.10.3.1

Added

• Added an offline collaboration recovery operator with immutable evidence, exact document fingerprints, verified backup and restore requirements, and resumable recovery journals.

Fixed

• Hardened PostgreSQL recovery evidence decoding and preservation of document identity, history, shares, and newer edits during recovery.
• Kept readable document content visible beside recovery actions on desktop and mobile when collaboration is quarantined.
• Recovered mailbox setup after interrupted session checks and coalesced redundant notification refreshes.
• Allowed a valid stored license certificate to recover from an outdated environment certificate and preserved scoped provider configuration.
• Improved live document reads, agent file navigation, and orderly test and server shutdown.

Security

• Updated the pinned pypdf runtime to 6.19.0 to address PDF parser denial-of-service vulnerabilities.

Verification

• Production build and focused lint checks.
• Selected UI and E2E scope: 91 passed, two optional Email Tour cases skipped; 19 subsequent editor and recovery checks passed after the final UI correction. Review and proposal workflows are outside this acceptance scope.
• Standalone raw PostgreSQL dry-run and recovery operator integration checks.
• npm run verify:release