feat: migrate ESLint to v9 flat config

- Replace .eslintrc.json with eslint.config.mjs
- Simplify configuration using @antfu/eslint-config
- Add necessary ESLint plugin dependencies
- Disable overly strict style rules
- Set package.json type to module for ESM support
- Fix ESLint disable comment format

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/components/base/image-uploader/image-preview.tsx

@@ -2,7 +2,7 @@ import type { FC } from 'react'
 import { createPortal } from 'react-dom'
 import XClose from '@/app/components/base/icons/line/x-close'
 
-type ImagePreviewProps = {
+interface ImagePreviewProps {
   url: string
   onCancel: () => void
 }