frontend/src/pages/Login.tsx

/**
 * T108: Login page with HF OAuth
 */
import { BookOpen } from 'lucide-react';
import { Button } from '@/components/ui/button';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import { login } from '@/services/auth';

export function Login() {
  const handleLogin = () => {
    login();
  };

  const handleLocalDev = () => {
    // Set a dummy token for local development
    localStorage.setItem('auth_token', 'local-dev-token');
    window.location.href = '/';
  };

  return (
    <div className="min-h-screen flex items-center justify-center bg-background p-4">
      <Card className="w-full max-w-md">
        <CardHeader className="text-center space-y-2">
          <div className="flex justify-center mb-4">
            <div className="h-16 w-16 rounded-full bg-primary/10 flex items-center justify-center">
              <BookOpen className="h-8 w-8 text-primary" />
            </div>
          </div>
          <CardTitle className="text-3xl">Document Viewer</CardTitle>
          <CardDescription className="text-base">
            AI-powered documentation with wikilinks, search, and backlinks
          </CardDescription>
        </CardHeader>
        <CardContent className="space-y-4">
          <Button 
            className="w-full" 
            size="lg"
            onClick={handleLogin}
          >
            <svg className="w-5 h-5 mr-2" viewBox="0 0 24 24" fill="currentColor">
              <path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-1-13h2v6h-2zm0 8h2v2h-2z"/>
            </svg>
            Sign in with Hugging Face
          </Button>

          <div className="relative">
            <div className="absolute inset-0 flex items-center">
              <span className="w-full border-t" />
            </div>
            <div className="relative flex justify-center text-xs uppercase">
              <span className="bg-background px-2 text-muted-foreground">
                or use local development mode
              </span>
            </div>
          </div>

          <Button 
            variant="outline" 
            className="w-full" 
            size="lg"
            onClick={handleLocalDev}
          >
            Continue as Local Dev
          </Button>

          <p className="text-xs text-center text-muted-foreground mt-6">
            By signing in, you agree to our Terms of Service and Privacy Policy
          </p>
        </CardContent>
      </Card>
    </div>
  );
}