refactor: migrate to monorepo structure with Docker, PocketBase, and e2e tests

- Reorganize into apps/, packages/, docs/, e2e/, pocketbase/ directories
- Add Dockerfiles for web, worker, and PocketBase services
- Add docker-compose.yml for local orchestration
- Add turbo.json for monorepo task management
- Add Playwright e2e test infrastructure
- Add PocketBase backend with migrations
- Remove Vite/Next.js/ESLint/PostCSS config files
- Update package.json with workspace dependencies
- Add .env.example and .dockerignore

apps/web/components/ui/avatar.tsx

@@ -0,0 +1,47 @@
+'use client';
+
+import * as React from 'react';
+import * as AvatarPrimitive from '@radix-ui/react-avatar';
+
+import { cn } from '@/lib/utils';
+
+const Avatar = React.forwardRef<
+  React.ComponentRef<typeof AvatarPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof AvatarPrimitive.Root>
+>(({ className, ...props }, ref) => (
+  <AvatarPrimitive.Root
+    ref={ref}
+    className={cn('relative flex h-10 w-10 shrink-0 overflow-hidden rounded-full', className)}
+    {...props}
+  />
+));
+Avatar.displayName = AvatarPrimitive.Root.displayName;
+
+const AvatarImage = React.forwardRef<
+  React.ComponentRef<typeof AvatarPrimitive.Image>,
+  React.ComponentPropsWithoutRef<typeof AvatarPrimitive.Image>
+>(({ className, ...props }, ref) => (
+  <AvatarPrimitive.Image
+    ref={ref}
+    className={cn('aspect-square h-full w-full', className)}
+    {...props}
+  />
+));
+AvatarImage.displayName = AvatarPrimitive.Image.displayName;
+
+const AvatarFallback = React.forwardRef<
+  React.ComponentRef<typeof AvatarPrimitive.Fallback>,
+  React.ComponentPropsWithoutRef<typeof AvatarPrimitive.Fallback>
+>(({ className, ...props }, ref) => (
+  <AvatarPrimitive.Fallback
+    ref={ref}
+    className={cn(
+      'flex h-full w-full items-center justify-center rounded-full bg-muted',
+      className
+    )}
+    {...props}
+  />
+));
+AvatarFallback.displayName = AvatarPrimitive.Fallback.displayName;
+
+export { Avatar, AvatarImage, AvatarFallback };