Fixes: 1) Reorder `router.push` in `useLogout` to properly clear cookies before redirection; 2) Resolve issues with inconsistent access token handling during Apollo header configuration;
Extra: 1) Cleanup comments in `useRefresh
Fixes: None;
Extra: 1) Create Pinia stores for app, user, category, and company management; 2) Add utility functions for error handling and category slug lookups; 3) Include German locale file and robots.txt for improved SEO and accessibility; 4) Add SVG assets and improve general folder structure for better maintainability.