fix: order scenarios in CSV export by date DESC, id DESC (newest first within same day)

feat: add preview endpoint for loading scenarios without saving; prevent duplicate records on load

feat: modular frontend – scenario preview, CSV export, load from list, interactive charts

chore: include simulator URLs under /simulator/

feat: scenario storage and retrieval – save on calculate, list/detail endpoints, CSV export

Add README

Update Docker config (entrypoint.sh)

Update .gitignore (static)

Add entrypoint script

Update dashboard.html