Create public demo page with free TTRPG resources and hourly reset

[hunter-read]

Summary

Create a public demo environment/page for the app using only free-to-redistribute TTRPG content.

Tasks

• Add demo books, maps, and tokens using only free resources
• Exclude any paid, licensed, or otherwise protected content
• Ensure books include proper metadata
• Tag demo content with:
  • books
  • maps
  • tokens
• Create a default demo user with GM credentials
• Disable settings API access for the demo user
• Automate demo reset every hour
  • Restore DB to default state
  • Ensure Docker setup supports reset workflow
• Organize demo data to clearly show folder structures in the app

Acceptance Criteria

• Demo contains only free redistributable resources
• Books have complete metadata
• Books/maps/tokens are tagged correctly
• Demo GM user exists by default
• Demo user cannot modify settings
• Demo resets automatically every hour
• Demo content clearly demonstrates folder organization