Floor navigation with up/down buttons

[AliiiBenn]

Description

Implement floor navigation for multi-level warehouses using up/down buttons.

Requirements

• Display current floor number
• "Up" button to go to floor above
• "Down" button to go to floor below
• Floor indicator in UI
• Support for up to 6 floors (dynamic)

User Flow

1. User views current floor
2. User clicks "Up" to see floor above
3. User clicks "Down" to see floor below
4. Grid updates to show selected floor

Priority

Medium - User experience

Notes

• Floor 0 is ground floor
• Empty floors can exist
• Floor data is stored with zone/product data