initial: split from gov-agreg — vreau.digital standalone platform

Moved from gov-agreg/src/pages/achizitii/* to root (drop prefix).
- 22 pages migrated, 127 files total
- All internal links: /achizitii/X → /X (176 occurrences fixed)
- AchizitiiLayout subnav rewritten: /X paths, top-right link to vreaudigital.ro hub
- BaseLayout new (vreau.digital branding, OG tags, site URL)
- astro.config.mjs: site https://vreau.digital, server output (was static)
- docker-compose: port 5096 (vreaudigital is 5095), container vreau-digital
- deploy.sh: paths /opt/vreau-digital, log /var/log/vreau-digital-deploy.log

Backend shared with gov-agreg:
- PostgreSQL satra (same schemas: seap, firms, anaf, anre, ...)
- Photon, Martin tiles
- Infisical /vreaudigital path (DATABASE_URL etc. shared)

build: PASS (npx astro check 0 errors, npm run build 5s vite + 10s server)

public/favicon.svg

@@ -0,0 +1,14 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32" fill="none">
+  <defs>
+    <linearGradient id="g" x1="0" y1="0" x2="32" y2="32" gradientUnits="userSpaceOnUse">
+      <stop offset="0%" stop-color="#1E3A5F"/>
+      <stop offset="100%" stop-color="#2563EB"/>
+    </linearGradient>
+  </defs>
+  <!-- Door shape with V cut -->
+  <rect x="4" y="2" width="24" height="28" rx="3" fill="url(#g)"/>
+  <!-- V cut in top-right -->
+  <polygon points="18,2 28,2 28,14" fill="#FAFBFC"/>
+  <!-- Door handle -->
+  <circle cx="12" cy="18" r="1.5" fill="#F59E0B"/>
+</svg>