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/avatar.tsx

@@ -1,9 +1,9 @@
-"use client"
+'use client';
 
-import * as React from "react"
-import * as AvatarPrimitive from "@radix-ui/react-avatar"
+import * as React from 'react';
+import * as AvatarPrimitive from '@radix-ui/react-avatar';
 
-import { cn } from "@/lib/utils"
+import { cn } from '@/lib/utils';
 
 const Avatar = React.forwardRef<
   React.ElementRef<typeof AvatarPrimitive.Root>,
@@ -11,14 +11,11 @@ const Avatar = React.forwardRef<
 >(({ className, ...props }, ref) => (
   <AvatarPrimitive.Root
     ref={ref}
-    className={cn(
-      "relative flex h-10 w-10 shrink-0 overflow-hidden rounded-full",
-      className
-    )}
+    className={cn('relative flex h-10 w-10 shrink-0 overflow-hidden rounded-full', className)}
     {...props}
   />
-))
-Avatar.displayName = AvatarPrimitive.Root.displayName
+));
+Avatar.displayName = AvatarPrimitive.Root.displayName;
 
 const AvatarImage = React.forwardRef<
   React.ElementRef<typeof AvatarPrimitive.Image>,
@@ -26,11 +23,11 @@ const AvatarImage = React.forwardRef<
 >(({ className, ...props }, ref) => (
   <AvatarPrimitive.Image
     ref={ref}
-    className={cn("aspect-square h-full w-full", className)}
+    className={cn('aspect-square h-full w-full', className)}
     {...props}
   />
-))
-AvatarImage.displayName = AvatarPrimitive.Image.displayName
+));
+AvatarImage.displayName = AvatarPrimitive.Image.displayName;
 
 const AvatarFallback = React.forwardRef<
   React.ElementRef<typeof AvatarPrimitive.Fallback>,
@@ -39,12 +36,12 @@ const AvatarFallback = React.forwardRef<
   <AvatarPrimitive.Fallback
     ref={ref}
     className={cn(
-      "flex h-full w-full items-center justify-center rounded-full bg-muted",
+      'flex h-full w-full items-center justify-center rounded-full bg-muted',
       className
     )}
     {...props}
   />
-))
-AvatarFallback.displayName = AvatarPrimitive.Fallback.displayName
+));
+AvatarFallback.displayName = AvatarPrimitive.Fallback.displayName;
 
-export { Avatar, AvatarImage, AvatarFallback }
+export { Avatar, AvatarImage, AvatarFallback };