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/settings/ProfileSettingsForm.test.tsx

@@ -65,11 +65,7 @@ describe('ProfileSettingsForm', () => {
   });
 
   const renderWithProvider = (component: React.ReactElement) => {
-    return render(
-      <QueryClientProvider client={queryClient}>
-        {component}
-      </QueryClientProvider>
-    );
+    return render(<QueryClientProvider client={queryClient}>{component}</QueryClientProvider>);
   };
 
   describe('Rendering', () => {