Bug Fixes - Fixed language settings not persisting correctly after selection.

Bug Fixes - Fixed language settings not persisting correctly after selection.

- Create CycleAverageService for consistent moving average calculation - Update battery cycles chart to use dynamic trend lines - Optimize tooltip performance with O(1) lookup using pre-calculated maps - Add trend values to tooltips for both charts - Add localization for "Trend" label in English and Dutch - Extract data processing to lifecycle methods for better performance - Add comprehensive unit tests for CycleAverageService - Ensure consistency between gains and battery cycles chart implementations

- Implemented **Offline Caching** for core data (user profile, plant list, plant status, and report data), allowing the app to function with the last known data when no internet connection is available. - Smoothed out charge graph by resorting to the previous data point when a data point is missing. - Fixed layout overflow issues in Reports charts on smaller screens. - Improved time-span selector to be responsive on compact displays. - Resolved display problems in Charge and Gain report views.

Updated backend URL

Fixed a bug in the monthly gain aggregation chart

Corrected a visualisation bug in the Gains screen.

- new Charge report page showing prices and state of charge into two separate panels - new Gains report page showing cumulative gains and allowing to select the aggregation period (day, month, year, all) - added version number in the Account page - several bug fixes and performance improvements

Small fixes to the chart visualization for small screens.

Fixed a bug in the last update widget.

Fixed numerous minor bugs and started rolling out the new look and feel.

* Fixed a bug in the Status page which shows the wrong value of the state of charge * Fixed a bug in the Report page > Gains table at the bottom where wrong values of energy were shown * Improved description of graphs on the Report page.

Added information on daily gain.