first

frontend/src/components/FileUpload.tsx

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+import { useCallback } from 'react'
+import { useDropzone } from 'react-dropzone'
+import { useTranslation } from 'react-i18next'
+import { cn } from '@/lib/utils'
+import { Card } from '@/components/ui/card'
+
+interface FileUploadProps {
+  onFilesSelected: (files: File[]) => void
+  accept?: Record<string, string[]>
+  maxSize?: number
+  maxFiles?: number
+  disabled?: boolean
+}
+
+export default function FileUpload({
+  onFilesSelected,
+  accept = {
+    'image/*': ['.png', '.jpg', '.jpeg'],
+    'application/pdf': ['.pdf'],
+    'application/vnd.openxmlformats-officedocument.wordprocessingml.document': ['.docx'],
+    'application/msword': ['.doc'],
+    'application/vnd.openxmlformats-officedocument.presentationml.presentation': ['.pptx'],
+    'application/vnd.ms-powerpoint': ['.ppt'],
+  },
+  maxSize = 50 * 1024 * 1024, // 50MB
+  maxFiles = 100,
+  disabled = false,
+}: FileUploadProps) {
+  const { t } = useTranslation()
+
+  const onDrop = useCallback(
+    (acceptedFiles: File[]) => {
+      if (acceptedFiles.length > 0) {
+        onFilesSelected(acceptedFiles)
+      }
+    },
+    [onFilesSelected]
+  )
+
+  const { getRootProps, getInputProps, isDragActive, isDragReject, fileRejections } = useDropzone({
+    onDrop,
+    accept,
+    maxSize,
+    maxFiles,
+    disabled,
+  })
+
+  return (
+    <div>
+      <Card
+        {...getRootProps()}
+        className={cn(
+          'border-2 border-dashed transition-colors cursor-pointer hover:border-primary/50',
+          {
+            'border-primary bg-primary/5': isDragActive && !isDragReject,
+            'border-destructive bg-destructive/5': isDragReject,
+            'opacity-50 cursor-not-allowed': disabled,
+          }
+        )}
+      >
+        <div className="p-12 text-center">
+          <input {...getInputProps()} />
+
+          <div className="mb-4">
+            <svg
+              className="mx-auto h-12 w-12 text-muted-foreground"
+              stroke="currentColor"
+              fill="none"
+              viewBox="0 0 48 48"
+              aria-hidden="true"
+            >
+              <path
+                d="M28 8H12a4 4 0 00-4 4v20m32-12v8m0 0v8a4 4 0 01-4 4H12a4 4 0 01-4-4v-4m32-4l-3.172-3.172a4 4 0 00-5.656 0L28 28M8 32l9.172-9.172a4 4 0 015.656 0L28 28m0 0l4 4m4-24h8m-4-4v8m-12 4h.02"
+                strokeWidth={2}
+                strokeLinecap="round"
+                strokeLinejoin="round"
+              />
+            </svg>
+          </div>
+
+          <div className="space-y-2">
+            {isDragActive ? (
+              <p className="text-lg font-medium text-primary">
+                {isDragReject ? t('upload.invalidFiles') : t('upload.dropFilesHere')}
+              </p>
+            ) : (
+              <>
+                <p className="text-lg font-medium text-foreground">
+                  {t('upload.dragAndDrop')}
+                </p>
+                <p className="text-sm text-muted-foreground">{t('upload.supportedFormats')}</p>
+                <p className="text-sm text-muted-foreground">{t('upload.maxFileSize')}</p>
+              </>
+            )}
+          </div>
+        </div>
+      </Card>
+
+      {fileRejections.length > 0 && (
+        <div className="mt-4 p-4 bg-destructive/10 border border-destructive rounded-md">
+          <p className="text-sm font-medium text-destructive mb-2">
+            {t('errors.uploadFailed')}
+          </p>
+          <ul className="text-sm text-destructive space-y-1">
+            {fileRejections.map(({ file, errors }) => (
+              <li key={file.name}>
+                {file.name}:{' '}
+                {errors.map((e) => {
+                  if (e.code === 'file-too-large') return t('errors.fileTooBig')
+                  if (e.code === 'file-invalid-type') return t('errors.unsupportedFormat')
+                  return e.message
+                })}
+              </li>
+            ))}
+          </ul>
+        </div>
+      )}
+    </div>
+  )
+}

frontend/src/components/Layout.tsx

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+import { Outlet, NavLink } from 'react-router-dom'
+import { useTranslation } from 'react-i18next'
+import { useAuthStore } from '@/store/authStore'
+import { apiClient } from '@/services/api'
+
+export default function Layout() {
+  const { t } = useTranslation()
+  const logout = useAuthStore((state) => state.logout)
+
+  const handleLogout = () => {
+    apiClient.logout()
+    logout()
+  }
+
+  const navLinks = [
+    { to: '/upload', label: t('nav.upload') },
+    { to: '/processing', label: t('nav.processing') },
+    { to: '/results', label: t('nav.results') },
+    { to: '/export', label: t('nav.export') },
+    { to: '/settings', label: t('nav.settings') },
+  ]
+
+  return (
+    <div className="min-h-screen bg-background">
+      {/* Header */}
+      <header className="border-b bg-card">
+        <div className="container mx-auto px-4 py-4 flex items-center justify-between">
+          <div>
+            <h1 className="text-2xl font-bold text-foreground">{t('app.title')}</h1>
+            <p className="text-sm text-muted-foreground">{t('app.subtitle')}</p>
+          </div>
+          <button
+            onClick={handleLogout}
+            className="px-4 py-2 text-sm font-medium text-foreground hover:text-primary transition-colors"
+          >
+            {t('nav.logout')}
+          </button>
+        </div>
+      </header>
+
+      {/* Navigation */}
+      <nav className="border-b bg-card">
+        <div className="container mx-auto px-4">
+          <ul className="flex space-x-1">
+            {navLinks.map((link) => (
+              <li key={link.to}>
+                <NavLink
+                  to={link.to}
+                  className={({ isActive }) =>
+                    `block px-4 py-3 text-sm font-medium transition-colors ${
+                      isActive
+                        ? 'text-primary border-b-2 border-primary'
+                        : 'text-muted-foreground hover:text-foreground'
+                    }`
+                  }
+                >
+                  {link.label}
+                </NavLink>
+              </li>
+            ))}
+          </ul>
+        </div>
+      </nav>
+
+      {/* Main Content */}
+      <main className="container mx-auto px-4 py-8">
+        <Outlet />
+      </main>
+    </div>
+  )
+}

frontend/src/components/MarkdownPreview.tsx

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+import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
+
+interface MarkdownPreviewProps {
+  title?: string
+  content: string
+  className?: string
+}
+
+export default function MarkdownPreview({ title, content, className }: MarkdownPreviewProps) {
+  return (
+    <Card className={className}>
+      {title && (
+        <CardHeader>
+          <CardTitle>{title}</CardTitle>
+        </CardHeader>
+      )}
+      <CardContent>
+        <div className="prose prose-sm max-w-none dark:prose-invert">
+          <pre className="whitespace-pre-wrap break-words bg-muted p-4 rounded-md overflow-auto max-h-[600px]">
+            {content}
+          </pre>
+        </div>
+      </CardContent>
+    </Card>
+  )
+}

frontend/src/components/ResultsTable.tsx

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+import { useTranslation } from 'react-i18next'
+import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from '@/components/ui/table'
+import { Badge } from '@/components/ui/badge'
+import { Button } from '@/components/ui/button'
+import type { FileResult } from '@/types/api'
+
+interface ResultsTableProps {
+  files: FileResult[]
+  onViewResult?: (fileId: number) => void
+  onDownloadPDF?: (fileId: number) => void
+}
+
+export default function ResultsTable({ files, onViewResult, onDownloadPDF }: ResultsTableProps) {
+  const { t } = useTranslation()
+
+  const getStatusBadge = (status: FileResult['status']) => {
+    switch (status) {
+      case 'completed':
+        return <Badge variant="success">{t('processing.completed')}</Badge>
+      case 'processing':
+        return <Badge variant="default">{t('processing.processing')}</Badge>
+      case 'failed':
+        return <Badge variant="destructive">{t('processing.failed')}</Badge>
+      default:
+        return <Badge variant="secondary">{t('processing.pending')}</Badge>
+    }
+  }
+
+  const formatTime = (seconds?: number) => {
+    if (!seconds) return 'N/A'
+    return `${seconds.toFixed(2)}s`
+  }
+
+  return (
+    <div className="rounded-md border">
+      <Table>
+        <TableHeader>
+          <TableRow>
+            <TableHead>{t('results.filename')}</TableHead>
+            <TableHead>{t('results.status')}</TableHead>
+            <TableHead>{t('results.processingTime')}</TableHead>
+            <TableHead className="text-right">{t('results.actions')}</TableHead>
+          </TableRow>
+        </TableHeader>
+        <TableBody>
+          {files.length === 0 ? (
+            <TableRow>
+              <TableCell colSpan={4} className="text-center text-muted-foreground">
+                {t('results.noResults')}
+              </TableCell>
+            </TableRow>
+          ) : (
+            files.map((file) => (
+              <TableRow key={file.id}>
+                <TableCell className="font-medium">{file.filename}</TableCell>
+                <TableCell>{getStatusBadge(file.status)}</TableCell>
+                <TableCell>{formatTime(file.processing_time)}</TableCell>
+                <TableCell className="text-right">
+                  <div className="flex justify-end gap-2">
+                    {file.status === 'completed' && (
+                      <>
+                        <Button
+                          variant="outline"
+                          size="sm"
+                          onClick={() => onViewResult?.(file.id)}
+                        >
+                          {t('results.viewMarkdown')}
+                        </Button>
+                        <Button
+                          variant="outline"
+                          size="sm"
+                          onClick={() => onDownloadPDF?.(file.id)}
+                        >
+                          {t('results.downloadPDF')}
+                        </Button>
+                      </>
+                    )}
+                    {file.status === 'failed' && file.error && (
+                      <span className="text-sm text-destructive">{file.error}</span>
+                    )}
+                  </div>
+                </TableCell>
+              </TableRow>
+            ))
+          )}
+        </TableBody>
+      </Table>
+    </div>
+  )
+}

frontend/src/components/ui/badge.tsx

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+import * as React from 'react'
+import { cn } from '@/lib/utils'
+
+export interface BadgeProps extends React.HTMLAttributes<HTMLDivElement> {
+  variant?: 'default' | 'secondary' | 'destructive' | 'outline' | 'success'
+}
+
+function Badge({ className, variant = 'default', ...props }: BadgeProps) {
+  return (
+    <div
+      className={cn(
+        'inline-flex items-center rounded-full border px-2.5 py-0.5 text-xs font-semibold transition-colors focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2',
+        {
+          'border-transparent bg-primary text-primary-foreground hover:bg-primary/80':
+            variant === 'default',
+          'border-transparent bg-secondary text-secondary-foreground hover:bg-secondary/80':
+            variant === 'secondary',
+          'border-transparent bg-destructive text-destructive-foreground hover:bg-destructive/80':
+            variant === 'destructive',
+          'border-transparent bg-green-500 text-white hover:bg-green-600': variant === 'success',
+          'text-foreground': variant === 'outline',
+        },
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Badge }

frontend/src/components/ui/button.tsx

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+import * as React from 'react'
+import { cn } from '@/lib/utils'
+
+export interface ButtonProps extends React.ButtonHTMLAttributes<HTMLButtonElement> {
+  variant?: 'default' | 'destructive' | 'outline' | 'secondary' | 'ghost' | 'link'
+  size?: 'default' | 'sm' | 'lg' | 'icon'
+}
+
+const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
+  ({ className, variant = 'default', size = 'default', ...props }, ref) => {
+    return (
+      <button
+        className={cn(
+          'inline-flex items-center justify-center rounded-md text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:opacity-50 disabled:pointer-events-none ring-offset-background',
+          {
+            'bg-primary text-primary-foreground hover:bg-primary/90': variant === 'default',
+            'bg-destructive text-destructive-foreground hover:bg-destructive/90':
+              variant === 'destructive',
+            'border border-input hover:bg-accent hover:text-accent-foreground':
+              variant === 'outline',
+            'bg-secondary text-secondary-foreground hover:bg-secondary/80':
+              variant === 'secondary',
+            'hover:bg-accent hover:text-accent-foreground': variant === 'ghost',
+            'underline-offset-4 hover:underline text-primary': variant === 'link',
+          },
+          {
+            'h-10 py-2 px-4': size === 'default',
+            'h-9 px-3 rounded-md': size === 'sm',
+            'h-11 px-8 rounded-md': size === 'lg',
+            'h-10 w-10': size === 'icon',
+          },
+          className
+        )}
+        ref={ref}
+        {...props}
+      />
+    )
+  }
+)
+Button.displayName = 'Button'
+
+export { Button }

frontend/src/components/ui/card.tsx

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+import * as React from 'react'
+import { cn } from '@/lib/utils'
+
+const Card = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
+  ({ className, ...props }, ref) => (
+    <div
+      ref={ref}
+      className={cn('rounded-lg border bg-card text-card-foreground shadow-sm', className)}
+      {...props}
+    />
+  )
+)
+Card.displayName = 'Card'
+
+const CardHeader = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
+  ({ className, ...props }, ref) => (
+    <div ref={ref} className={cn('flex flex-col space-y-1.5 p-6', className)} {...props} />
+  )
+)
+CardHeader.displayName = 'CardHeader'
+
+const CardTitle = React.forwardRef<HTMLParagraphElement, React.HTMLAttributes<HTMLHeadingElement>>(
+  ({ className, ...props }, ref) => (
+    <h3
+      ref={ref}
+      className={cn('text-2xl font-semibold leading-none tracking-tight', className)}
+      {...props}
+    />
+  )
+)
+CardTitle.displayName = 'CardTitle'
+
+const CardDescription = React.forwardRef<
+  HTMLParagraphElement,
+  React.HTMLAttributes<HTMLParagraphElement>
+>(({ className, ...props }, ref) => (
+  <p ref={ref} className={cn('text-sm text-muted-foreground', className)} {...props} />
+))
+CardDescription.displayName = 'CardDescription'
+
+const CardContent = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
+  ({ className, ...props }, ref) => (
+    <div ref={ref} className={cn('p-6 pt-0', className)} {...props} />
+  )
+)
+CardContent.displayName = 'CardContent'
+
+const CardFooter = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
+  ({ className, ...props }, ref) => (
+    <div ref={ref} className={cn('flex items-center p-6 pt-0', className)} {...props} />
+  )
+)
+CardFooter.displayName = 'CardFooter'
+
+export { Card, CardHeader, CardFooter, CardTitle, CardDescription, CardContent }

frontend/src/components/ui/progress.tsx

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+import * as React from 'react'
+import { cn } from '@/lib/utils'
+
+export interface ProgressProps extends React.HTMLAttributes<HTMLDivElement> {
+  value?: number
+  max?: number
+}
+
+const Progress = React.forwardRef<HTMLDivElement, ProgressProps>(
+  ({ className, value = 0, max = 100, ...props }, ref) => {
+    const percentage = Math.min(Math.max((value / max) * 100, 0), 100)
+
+    return (
+      <div
+        ref={ref}
+        className={cn('relative h-4 w-full overflow-hidden rounded-full bg-secondary', className)}
+        {...props}
+      >
+        <div
+          className="h-full w-full flex-1 bg-primary transition-all duration-300 ease-in-out"
+          style={{ transform: `translateX(-${100 - percentage}%)` }}
+        />
+      </div>
+    )
+  }
+)
+Progress.displayName = 'Progress'
+
+export { Progress }

frontend/src/components/ui/table.tsx

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+import * as React from 'react'
+import { cn } from '@/lib/utils'
+
+const Table = React.forwardRef<HTMLTableElement, React.HTMLAttributes<HTMLTableElement>>(
+  ({ className, ...props }, ref) => (
+    <div className="w-full overflow-auto">
+      <table ref={ref} className={cn('w-full caption-bottom text-sm', className)} {...props} />
+    </div>
+  )
+)
+Table.displayName = 'Table'
+
+const TableHeader = React.forwardRef<
+  HTMLTableSectionElement,
+  React.HTMLAttributes<HTMLTableSectionElement>
+>(({ className, ...props }, ref) => (
+  <thead ref={ref} className={cn('[&_tr]:border-b', className)} {...props} />
+))
+TableHeader.displayName = 'TableHeader'
+
+const TableBody = React.forwardRef<
+  HTMLTableSectionElement,
+  React.HTMLAttributes<HTMLTableSectionElement>
+>(({ className, ...props }, ref) => (
+  <tbody ref={ref} className={cn('[&_tr:last-child]:border-0', className)} {...props} />
+))
+TableBody.displayName = 'TableBody'
+
+const TableRow = React.forwardRef<HTMLTableRowElement, React.HTMLAttributes<HTMLTableRowElement>>(
+  ({ className, ...props }, ref) => (
+    <tr
+      ref={ref}
+      className={cn(
+        'border-b transition-colors hover:bg-muted/50 data-[state=selected]:bg-muted',
+        className
+      )}
+      {...props}
+    />
+  )
+)
+TableRow.displayName = 'TableRow'
+
+const TableHead = React.forwardRef<
+  HTMLTableCellElement,
+  React.ThHTMLAttributes<HTMLTableCellElement>
+>(({ className, ...props }, ref) => (
+  <th
+    ref={ref}
+    className={cn(
+      'h-12 px-4 text-left align-middle font-medium text-muted-foreground [&:has([role=checkbox])]:pr-0',
+      className
+    )}
+    {...props}
+  />
+))
+TableHead.displayName = 'TableHead'
+
+const TableCell = React.forwardRef<
+  HTMLTableCellElement,
+  React.TdHTMLAttributes<HTMLTableCellElement>
+>(({ className, ...props }, ref) => (
+  <td
+    ref={ref}
+    className={cn('p-4 align-middle [&:has([role=checkbox])]:pr-0', className)}
+    {...props}
+  />
+))
+TableCell.displayName = 'TableCell'
+
+export { Table, TableHeader, TableBody, TableRow, TableHead, TableCell }

frontend/src/components/ui/toast.tsx

@@ -0,0 +1,116 @@
+import * as React from 'react'
+import { cn } from '@/lib/utils'
+
+export type ToastProps = {
+  id: string
+  title?: string
+  description?: string
+  variant?: 'default' | 'destructive' | 'success'
+  duration?: number
+}
+
+type ToastContextType = {
+  toasts: ToastProps[]
+  toast: (props: Omit<ToastProps, 'id'>) => void
+  dismiss: (id: string) => void
+}
+
+const ToastContext = React.createContext<ToastContextType | undefined>(undefined)
+
+export function ToastProvider({ children }: { children: React.ReactNode }) {
+  const [toasts, setToasts] = React.useState<ToastProps[]>([])
+
+  const toast = React.useCallback((props: Omit<ToastProps, 'id'>) => {
+    const id = Math.random().toString(36).substr(2, 9)
+    const duration = props.duration ?? 3000
+
+    setToasts((prev) => [...prev, { ...props, id }])
+
+    if (duration > 0) {
+      setTimeout(() => {
+        setToasts((prev) => prev.filter((t) => t.id !== id))
+      }, duration)
+    }
+  }, [])
+
+  const dismiss = React.useCallback((id: string) => {
+    setToasts((prev) => prev.filter((t) => t.id !== id))
+  }, [])
+
+  return (
+    <ToastContext.Provider value={{ toasts, toast, dismiss }}>
+      {children}
+      <ToastViewport toasts={toasts} dismiss={dismiss} />
+    </ToastContext.Provider>
+  )
+}
+
+export function useToast() {
+  const context = React.useContext(ToastContext)
+  if (!context) {
+    throw new Error('useToast must be used within ToastProvider')
+  }
+  return context
+}
+
+function ToastViewport({
+  toasts,
+  dismiss,
+}: {
+  toasts: ToastProps[]
+  dismiss: (id: string) => void
+}) {
+  return (
+    <div className="fixed top-0 right-0 z-50 w-full max-w-md p-4 space-y-4 pointer-events-none">
+      {toasts.map((toast) => (
+        <Toast key={toast.id} {...toast} onDismiss={() => dismiss(toast.id)} />
+      ))}
+    </div>
+  )
+}
+
+function Toast({
+  title,
+  description,
+  variant = 'default',
+  onDismiss,
+}: ToastProps & { onDismiss: () => void }) {
+  return (
+    <div
+      className={cn(
+        'pointer-events-auto w-full rounded-lg border p-4 shadow-lg transition-all',
+        'bg-background text-foreground',
+        {
+          'border-destructive': variant === 'destructive',
+          'border-green-500': variant === 'success',
+        }
+      )}
+    >
+      <div className="flex items-start gap-3">
+        <div className="flex-1 space-y-1">
+          {title && <div className="text-sm font-semibold">{title}</div>}
+          {description && <div className="text-sm text-muted-foreground">{description}</div>}
+        </div>
+        <button
+          onClick={onDismiss}
+          className="text-foreground/50 hover:text-foreground transition-colors"
+        >
+          <svg
+            xmlns="http://www.w3.org/2000/svg"
+            width="16"
+            height="16"
+            viewBox="0 0 24 24"
+            fill="none"
+            stroke="currentColor"
+            strokeWidth="2"
+            strokeLinecap="round"
+            strokeLinejoin="round"
+          >
+            <line x1="18" y1="6" x2="6" y2="18"></line>
+            <line x1="6" y1="6" x2="18" y2="18"></line>
+          </svg>
+        </button>
+      </div>
+    </div>
+  )
+}