Fixes: 1) Replace `ElNotification` with `useNotification` across all components and composables; 2) Add missing semicolons, consistent formatting, and type annotations in multiple files; 3) Resolve non-reactive elements in wishlist and cart state management;
Extra: 1) Update i18n translations with new strings for promocodes, balance, authentication, and profile settings; 2) Refactor SCSS styles including variable additions and component-specific tweaks; 3) Remove redundant queries, unused imports, and `storePage.ts` file for cleanup.
