Enhance UI and dev workflow: add main/right tabbed panels (Repositories/Local and Clone/Settings/Servers), repository owner filter pills (All/Personal/Organizations), org-grouped listing, repo cards, git output and empty-state styling. Introduce new state vars (activeMainTab, activeRightTab, repoOwnerFilter, currentUserLogin) and update event bindings to toggle tabs/filters and focus appropriate panels on actions. Add fetchCurrentUser to gitea-api and use it when loading repositories to distinguish personal vs organization repos (falls back to mock user on error). Update README with development/prerequisites and build instructions and rename npm script "tauri:dev" -> "dev" for running the Tauri dev process.