Implement bottom navigation (Documents, Add, Safety)

[celticr]

Summary

Replace current navigation with new bottom navigation pattern.

Design Reference

See /client/src/new-ux-ui-images/Screenshot 2026-01-10 at 17.44.04.png

Requirements

• Fixed bottom navigation bar
• Three items: Documents | (+) Add | Safety
• Documents icon and label
• Circular (+) add button in center
• Safety shield icon and label

Acceptance Criteria

• Bottom nav component
• Documents tab active state
• Add button opens modal
• Safety tab opens safety panel

[celticr]

2026 Design Reference

Key elements: Bottom bar with Documents, (+) Add button, Safety

[celticr]

2026 Design Reference

Key elements: Bottom bar with Documents, (+) Add button, Safety