Sossoldi

* NEW Feature: Subcategory feature - Users can now create and manage subcategories within main categories. * NEW Feature: Drag & drop sorting for categories and accounts - Users can easily reorder categories and accounts using drag & drop * Fixed: Persist last used value for balance blurring - The application now remembers the user’s balance blurring preference instead of always blurring by default * Fixed: Dark theme startup flicker * Refactor: Improved budgets and recurring transactions