feat: sticky navy header, AJAX search overlay, nav consistency

- Replace transparent/absolute homepage header with sticky navy header
  globally (position:sticky on #masthead) — same navy look everywhere
- Remove transparent-header body_class logic; always set non-transparent
- Simplify homepage CSS: hero fills 100vh, no absolute header overlay
- Add magnifying glass search icon to primary nav menus (ES/EN/RO)
- Add full-screen AJAX search overlay with WP REST API live results,
  multilingual placeholders, ESC/Ctrl+K keyboard shortcuts
- Add ro_RO core + Yoast language packs to repo
- Install and configure Yoast SEO with meta for all 63 posts + 12 pages
- Add tags and ACRIB author to all posts
- CF7 redesign: 2-column layout, legal checkboxes, reference number badge

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

wp-content/languages/ro_RO-9c3519f4870fac83dc0dbf18cb6bd4c4.json

@@ -0,0 +1 @@
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