- Add step-by-step progress indicator (Preparing → Helper → Image → Restart)
- Display elapsed time during upgrade (MM:SS format)
- Show version transition in header (v4.0.0-beta.454 → v4.0.0-beta.456)
- Add expandable changelog preview before upgrading
- Reduce reload delay from 5s to 3s with countdown timer
- Add "Reload Now" button to skip countdown
- Improve status messages with step-specific descriptions
- Add success state with clear indication when upgrade completes
- Create new upgrade-progress component for visual step tracking
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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