Add vase design: split SVG title/image/date into homepage sections

- Hero glass panel now shows Lina · rings · Marlin from vase artwork
  (side-by-side on landscape, stacked on portrait)
- Vase illustration used as ornamental divider above album grid
- Vase date used as footer closing line
- Homepage structure: intro text, ornament, albums divider, gallery, date

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

content/_index.md

@@ -2,6 +2,8 @@
 title: "Herzlich Willkommen"
 params:
   tagline: "Schön, dass ihr da seid."
+  albums_label: "Alben"
+  closing: "20. Juni 2026"
 ---
 
 Hier findet ihr die Erinnerungen an unseren besonderen Tag — festgehalten in Bildern, die für immer bleiben.