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/types/api.d.ts

@@ -1,7 +1,7 @@
 declare namespace API {
-    interface ErrorResponse {
-        detail: string;
-    }
+  interface ErrorResponse {
+    detail: string;
+  }
 
-    // Add more types as you develop your API
-}
+  // Add more types as you develop your API
+}