SIMPLE v2.0

REMOVED:
- separate oppl.ai exporter
- separate broker.oppl.io importer
- package signing secret
- import API key
- ZIP exports
- manual password hashing
- copied PHP application per client
- multi-server configuration

ADDED:
- one setup page
- one administrator password
- one client-creation form
- direct local copying of exact run JSON and source text
- automatic long secret client URL
- automatic client password generation
- shared client interface over isolated frozen vaults

The live/current complex demo is not changed.
