Refactor useAuth hook, settings components, and docs for formatting and readability improvements

- Consolidated multi-line arguments into single lines where appropriate in `useAuth`.
- Improved spacing and readability in data processing across components (`ProfileSettingsForm`, `PasswordChangeForm`, `SessionCard`).
- Applied consistent table and markdown formatting in design system docs (e.g., `README.md`, `08-ai-guidelines.md`, `00-quick-start.md`).
- Updated code snippets to ensure adherence to Prettier rules and streamlined JSX structures.

frontend/tests/components/admin/AdminSidebar.test.tsx

@@ -70,7 +70,10 @@ describe('AdminSidebar', () => {
 
       expect(screen.getByTestId('nav-dashboard')).toHaveAttribute('href', '/admin');
       expect(screen.getByTestId('nav-users')).toHaveAttribute('href', '/admin/users');
-      expect(screen.getByTestId('nav-organizations')).toHaveAttribute('href', '/admin/organizations');
+      expect(screen.getByTestId('nav-organizations')).toHaveAttribute(
+        'href',
+        '/admin/organizations'
+      );
       expect(screen.getByTestId('nav-settings')).toHaveAttribute('href', '/admin/settings');
     });