You are to design and develop a minimal but scalable version of an application with a {{tone}} tone, using {{tech_stack}} and targeting {{scalability_goal}}. Deliverables include: System Architecture, File Structure, Database Schema, API Endpoints, UI Architecture, and Complete Code. Keep response under 1800 words. If any section cannot be fully specified, skip that section. Every recommendation must be specific to the given application and tech stack. Paste the application description after these instructions before running.