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/src/components/docs/CodeBlock.tsx

@@ -74,7 +74,9 @@ function extractTextFromChildren(children: React.ReactNode): string {
   }
 
   if (children && typeof children === 'object' && 'props' in children) {
-    return extractTextFromChildren((children as { props: { children: React.ReactNode } }).props.children);
+    return extractTextFromChildren(
+      (children as { props: { children: React.ReactNode } }).props.children
+    );
   }
 
   return '';