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/ui/textarea.tsx

@@ -1,22 +1,21 @@
-import * as React from "react"
+import * as React from 'react';
 
-import { cn } from "@/lib/utils"
+import { cn } from '@/lib/utils';
 
-const Textarea = React.forwardRef<
-  HTMLTextAreaElement,
-  React.ComponentProps<"textarea">
->(({ className, ...props }, ref) => {
-  return (
-    <textarea
-      className={cn(
-        "flex min-h-[60px] w-full rounded-md border border-input bg-transparent px-3 py-2 text-base shadow-sm placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
-        className
-      )}
-      ref={ref}
-      {...props}
-    />
-  )
-})
-Textarea.displayName = "Textarea"
+const Textarea = React.forwardRef<HTMLTextAreaElement, React.ComponentProps<'textarea'>>(
+  ({ className, ...props }, ref) => {
+    return (
+      <textarea
+        className={cn(
+          'flex min-h-[60px] w-full rounded-md border border-input bg-transparent px-3 py-2 text-base shadow-sm placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:cursor-not-allowed disabled:opacity-50 md:text-sm',
+          className
+        )}
+        ref={ref}
+        {...props}
+      />
+    );
+  }
+);
+Textarea.displayName = 'Textarea';
 
-export { Textarea }
+export { Textarea };