canvas-website/backlog/tasks/task-048 - Version-History-&-CryptID-Registration-Enhancements.md

id	title	status	assignee	created_date	updated_date	labels	dependencies	priority
task-048	Version History & CryptID Registration Enhancements	Done		2025-12-10 22:22	2025-12-10 22:22	feature auth history		high

Description

Add version history feature with diff visualization and enhance CryptID registration flow with email backup

Implementation Notes

Implementation Summary

Email Service (SendGrid → Resend)

• Updated worker/types.ts to use RESEND_API_KEY
• Updated worker/cryptidAuth.ts sendEmail() to use Resend API

CryptID Registration Flow

• Multi-step registration: welcome → username → email → success
• Detailed explainer about passwordless authentication
• Email backup for multi-device access
• Added email field to Session type

Version History Feature

Backend API Endpoints:

• GET /room/:roomId/history - Get version history
• GET /room/:roomId/snapshot/:hash - Get snapshot at version
• POST /room/:roomId/diff - Compute diff between versions
• POST /room/:roomId/revert - Revert to a version

Frontend Components:

• VersionHistoryPanel.tsx - Timeline with diff visualization
• useVersionHistory.ts - React hook for programmatic access
• GREEN highlighting for added shapes
• RED highlighting for removed shapes
• PURPLE highlighting for modified shapes

Other Fixes

• Network graph connect/trust buttons now work
• CryptID dropdown integration buttons improved
• Obsidian vault connection modal added

Pushed to dev branch: commit 195cc7f