Create task task-022

backlog/tasks/task-022 - Board-Version-History-&-Change-Visualization.md

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+---
+id: task-022
+title: Board Version History & Change Visualization
+status: To Do
+assignee: []
+created_date: '2025-12-04 12:59'
+labels:
+  - feature
+  - collaboration
+  - R2
+  - tldraw
+dependencies: []
+priority: high
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+Implement R2 backup version browsing/restoration and visual change highlighting for multi-user collaboration:
+
+1. **Version History Tool**: UI element to browse and restore board backups from R2
+   - List available backup versions (by date)
+   - Preview backup contents before restore
+   - One-click restore to previous version
+   - Confirmation dialog to prevent accidental overwrites
+
+2. **Change Visualization**: Visual indicators for recent changes by other users
+   - Yellow glow around newly created objects (until viewed/acknowledged)
+   - Grey glow around recently deleted objects (shown as ghosts until seen)
+   - User attribution for changes (who made what change)
+   - "Mark all as seen" functionality
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+<!-- AC:BEGIN -->
+- [ ] #1 Version history panel shows available backup dates
+- [ ] #2 Can preview a backup before restoring
+- [ ] #3 Can restore a board to a previous version
+- [ ] #4 New objects from other users show yellow glow
+- [ ] #5 Deleted objects show grey ghost glow until acknowledged
+- [ ] #6 Changes can be marked as 'seen'
+<!-- AC:END -->