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/home/FeatureGrid.tsx

@@ -95,7 +95,8 @@ export function FeatureGrid() {
           Comprehensive Features, No Assembly Required
         </h2>
         <p className="text-lg text-muted-foreground max-w-2xl mx-auto">
-          Everything you need to build production-grade web applications. Clone, customize, and ship.
+          Everything you need to build production-grade web applications. Clone, customize, and
+          ship.
         </p>
       </motion.div>