feat: Initialize frontend with React, Vite, and Tailwind CSS

- Set up main entry point for React application.
- Create About, Home, NotFound, Privacy, and Terms pages with SEO support.
- Implement API service for file uploads and task management.
- Add global styles using Tailwind CSS.
- Create utility functions for SEO and text processing.
- Configure Vite for development and production builds.
- Set up Nginx configuration for serving frontend and backend.
- Add scripts for cleanup of expired files and sitemap generation.
- Implement deployment script for production environment.

frontend/src/pages/TermsPage.tsx

@@ -0,0 +1,66 @@
+import { useTranslation } from 'react-i18next';
+import { Helmet } from 'react-helmet-async';
+
+export default function TermsPage() {
+  const { t } = useTranslation();
+
+  return (
+    <>
+      <Helmet>
+        <title>{t('common.terms')} — {t('common.appName')}</title>
+        <meta name="description" content="Terms of service for our online tools." />
+      </Helmet>
+
+      <div className="prose mx-auto max-w-2xl dark:prose-invert">
+        <h1>{t('common.terms')}</h1>
+        <p><em>Last updated: {new Date().toISOString().split('T')[0]}</em></p>
+
+        <h2>1. Acceptance of Terms</h2>
+        <p>
+          By accessing and using SaaS-PDF, you agree to be bound by these Terms of
+          Service. If you do not agree, please discontinue use immediately.
+        </p>
+
+        <h2>2. Service Description</h2>
+        <p>
+          SaaS-PDF provides free online tools for file conversion, compression,
+          and transformation. The service is provided &ldquo;as is&rdquo; without
+          warranties of any kind.
+        </p>
+
+        <h2>3. Acceptable Use</h2>
+        <ul>
+          <li>You may only upload files that you have the right to process.</li>
+          <li>You must not upload malicious, illegal, or copyrighted content without authorization.</li>
+          <li>Automated or excessive use of the service is prohibited.</li>
+        </ul>
+
+        <h2>4. File Handling</h2>
+        <ul>
+          <li>All uploaded and processed files are automatically deleted within 2 hours.</li>
+          <li>We are not responsible for any data loss during processing.</li>
+          <li>You are responsible for maintaining your own file backups.</li>
+        </ul>
+
+        <h2>5. Limitation of Liability</h2>
+        <p>
+          SaaS-PDF shall not be liable for any direct, indirect, incidental, or
+          consequential damages resulting from the use or inability to use the
+          service.
+        </p>
+
+        <h2>6. Changes to Terms</h2>
+        <p>
+          We reserve the right to modify these terms at any time. Continued use of
+          the service after changes constitutes acceptance of the updated terms.
+        </p>
+
+        <h2>7. Contact</h2>
+        <p>
+          Questions about these terms? Contact us at{' '}
+          <a href="mailto:support@example.com">support@example.com</a>.
+        </p>
+      </div>
+    </>
+  );
+}