Inventory PWA System Implementation Plan

This document outlines the technical architecture for the unified Inventory System (FastAPI + PWA).

Proposed Architecture

Framework: Python + FastAPI
Database: SQLite (SQLAlchemy ORM)
Key Modules:
- Items / Interventions: Standard CRUD logic.
- Audit: Every payload that mutates data writes an immutable log row.
- AI-OCR: Endpoint integrating Google Gemini Vision API (via Google AI Studio key) for complex label extraction onboarding.

Framework: React + Next.js (or equivalent).
Offline Engine: Service Workers, IndexedDB local storage map.
Desktop Mode: Full width dashboard, management, and settings.
Mobile Mode (Browser / Add to Homescreen): Dedicated full-screen scanner using html5-qrcode.

Routine Scans (Check-ins/Outs): Client-side HTML5 barcode scanner. Cost: $0.
Label Scanning (New Item): Proxies a request to the Gemini API to parse the SFP label into JSON template fields.

Phase 1: Database & Backend Foundation - SQLite schemas, User management, and Python API structures.
Phase 2: Core Inventory API - Endpoints to Add/Remove items, offline sync-merge logic, Audit triggers.
Phase 3: The PWA Frontend - PWA manifest, offline capabilities, UI scaffolding for Desktop/Mobile.
Phase 4: Client-Side Scanning - Integration of local JS barcode reading for routine stock scanning.
Phase 5: Gemini AI Vision Integration - Server-side Gemini API integration and the text-mapping frontend view.