Implement 3-step account creation flow with progress indicator

[celticr]

Summary

Redesign account creation as a 3-step wizard with visual progress indicator.

Design Reference

See /client/src/new-ux-ui-images/Screenshot 2026-01-10 at 17.40.58.png through 17.41.59.png

Steps

1. Choose safe name + upload image for password
2. Save key image (download) + optional recovery email
3. Confirm key image works (re-upload to verify)

Requirements

• Progress indicator showing steps 1-2-3
• Back/Exit navigation
• Clear warnings about key image handling
• Key fingerprint display for verification
• Recovery email option (optional)

Acceptance Criteria

• 3-step wizard flow
• Progress indicator UI
• Step 1: Name + image upload
• Step 2: Download key + recovery email option
• Step 3: Verify key image works
• Warnings about not editing/cropping key image

[celticr]

2026 Design Reference

Step 1:

Step 2:

Step 2 (recovery expanded):

Step 3: