01 — Architecture Overview

Backend: Laravel 12 (PHP 8.3), API-first.
Super Admin: Filament 4 web panel (platform operations only).
Tenant Admin: Separate React/Vite PWA, store-ready (Android TWA, iOS Capacitor). See ADR-0006.
Guest PWA: React/Vite, anonymous session for attendees.
Storage: S3-compatible object storage, signed URLs, CDN in front.
Queues: Redis + Horizon for media processing and async jobs.
DB: Single database, row-level multi-tenancy using tenant_id and policies.

Components

API (/api/v1) with OAuth2 PKCE for tenant apps; session auth for Super Admin.
Media pipeline: upload -> scan -> transform (EXIF/orientation/sizes) -> store -> CDN.
Notifications: Web Push (VAPID); Capacitor push for iOS wrapper when needed.
Observability: request ID, structured logs, audit trails for admin actions.