[ISSUE-021] Inventory Mobile Interface

## Phase 4: Inventory Management (Week 6)

### Description
Create inventory list screen
Implement add ingredient form (name, quantity, unit, expiration date)
Create edit/delete functionality
Add expiration alerts and warnings
Implement ingredient categorization (produce, dairy, meat, etc.)

### Dependencies
- #006
- #020

### Can Work in Parallel With
- #020

Start by reviewing dependencies #006 and #020, then map the mobile interface needed for the inventory list and ingredient form. Done means users can add, edit, delete, categorize, and view expiration alerts for ingredients with name, quantity, unit, and expiration date.

Written by the indexing model from the issue text.