/claim #1162 /closes #1162

Add a date picker to the map to view site data and WMS overlays as of a selected past date.

The backend /sites endpoint now accepts an optional at parameter to return collectionData as of that timestamp, derived from time-series data. The frontend Home Map includes a date picker that updates site markers and passes the selected date as a TIME parameter to the WMS SST Anomaly layer. Sofar layers remain current as they do not support time parameters.

Demo video - Free Data Management Platform for Monitoring of Marine Ecosystems - Brave 2025-10-18 16-44-36.zip