Replace manifesto bar with compact context bar + add privacy page

- layout.php: replace large manifesto section (eyebrow/title/sub/4 stats) with
  a slim dbn-context-bar strip linking to why-ours, pricing, MCP, and privacy
- i18n.php: add context_bar_* + footer_privacy_link + privacy_page_title keys
  to all 4 language blocks (en, no, uk, pl)
- dbn-tools-redesign.css: add .dbn-context-bar styles with mobile wrap
- privacy.php: new standalone page in 4 languages covering in-memory processing,
  metadata-only logging, My Case opt-in storage, EU data locations, and HTTPS transport
- footer.php: add Privacy link to first footer column

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

includes/footer.php

@@ -28,6 +28,7 @@ function _ft(string $key, string $lang): string {
         <a href="https://dobetternorge.no/library.php"><?= _ft('footer_legal_lib', $_footerLang) ?></a>
         <a href="/pricing.php"><?= _ft('pricing_nav_link', $_footerLang) ?></a>
         <a href="/why-ours.php"><?= _ft('why_ours_trust_link', $_footerLang) ?></a>
+        <a href="/privacy.php"><?= _ft('footer_privacy_link', $_footerLang) ?></a>
         <a href="mailto:support@dobetternorge.no"><?= _ft('footer_report', $_footerLang) ?></a>
       </div>
       <div class="lt-footer__link-col">