Add a day/night greyline (terminator) overlay to the dashboard map.
- New assets/js/leaflet/L.Terminator.js: a Leaflet polygon plugin that computes the solar terminator for a given time and exposes L.terminator().
- Load the terminator script in the footer and register a Greyline overlay layer with start/stop interval updates (refreshes every minute). Updates are managed when the overlay is added/removed or when the map unloads to avoid orphaned timers.
- Expose the greyline as a toggleable overlay in the map layer control and add markers to a dedicated markersLayer overlay (instead of adding them directly to the map).
- Add a user preference checkbox to application/views/user/edit.php (Enable Dashboard Map Greyline Layer) and wire saving/reading of the dashboard_map_greyline option in application/controllers/User.php and application/controllers/Dashboard.php. Default behavior is enabled when not set.
This change lets users enable/disable the visual day/night terminator on the dashboard map and ensures proper lifecycle handling for updates and marker layering.
Add per-user/logbook file caching for dashboard statistics (15min TTL) and update Dashboard controller to use cached qso, countries, VUCC and QSL queries. Introduce clear_dashboard_cache() in Logbook_model and call it on QSO create/update/delete to invalidate affected users' cache entries. Add migration (249) to create composite indexes (idx_dxcc_stats, idx_vucc_gridsquare, idx_vucc_grids) to improve dashboard query performance, and bump migration_version to 249. Also include generated cache files under application/cache for current stats.
Added error checks when fetching DXpedition data in Workabledxcc_model and updated Dashboard controller to only sort valid records. The upcoming_dxccs view now displays a warning message if an error occurs, improving user feedback and robustness.
Replaced multiple individual queries in Dashboard controller with consolidated methods for setup counts and country statistics. Added getAllSetupCounts to Setup_model and get_countries_statistics_consolidated to Logbook_model to improve performance and reduce database load.
Refactored Dashboard controller to load common models in the constructor and optimize dashboard options processing using associative arrays for faster lookups. Replaced DXCC entity counting logic with a new get_total_dxcc_count() method in the Dxcc model to avoid loading all records, improving performance.
Replaced multiple individual queries for QSO statistics in Dashboard controller with a single consolidated query in Logbook_model. This improves performance by reducing database calls when fetching today's, total, monthly, and yearly QSO counts.
Removed extra login session check and migration check as its called by auto load this speeds up page load time and reduces SQL queries down to 44 for the page which is still too many
